Human Resource and Management Essay Example for Free

Human Resource and Management Essay It is widely accepted that functions involving management include planning goals of the organization, organizing its employees so that efficiency can be achieved, leading involves employee motivation and influence, whereas control function makes sure that all other functions help bring success to the organization . Another viewpoint is that there is a fifth function which is staffing. Staffing involves the HRM department making sure that the appropriate people with valuable skills are placed on jobs (Bartol, 2004). Human resource department has become more important today as it is integrated and much more strategically involved. The HRM department sees it very important in order to be successful as an organization much effort should be put on recruitment of employees, then they should be motivated to perform their task, and trained to execute their responsibilities effectively. To built an efficient work force and maintain it on that level the HRM needs to influence employee behaviour when they seem off track. The few ways in which they can do is by organizing which includes job design/redesign, remuneration and benefits, training and development, and performance management. Job Design Job design is method which involves organizing employee tasks and giving them responsibilities. It also focuses on changing duties of employees so that job satisfaction is gained, which therefore increases efficiency. It focuses on the content of job and effect it has on employee motivation and effectiveness. If job satisfaction is achieved productivity can also be achieved, some people prefer jobs which they feel comfortable at, identifying what makes a good job for the employee can be helpful in improving performance, this can make difference on cost resulting from absenteeism and low turnover. The job fit matches characteristic of people with characteristic of jobs. A person not fitting a job can be disastrous for the company and the employee. By re-designing the job the person/job fit can be may be improved, this can affect employee motivation as the job becomes favourable for employee, catering to their need of job-related satisfaction, for example a person who does not likes to talk much may find it awkward and frustrating at a bank teller job because there he may have to interact with people all day long (Keaton, 2001). Read more:Â  Areas of Human Resources Management Business The ways to re-design a job includes job enlargement and job enrichment, this involves reducing the problems faced by the employee on job. Broadening the scope of the job by expanding the tasks to be performed may reduce the monotonous job experience, as their would be new tasks for the employee to perform, this may help influence behaviour as the employee may achieve job satisfaction and also feel more important as a part of the organization. Job enrichment deals with the employee given more responsibility then before, by adding planning, controlling and evaluating to his job function. Job enrichment may include giving the employee the entire job rather then a part of work, expanding the assignment so that the employee can learn from new tasks, moreover developing new areas of expertise. It may also include giving the employee more autonomy so that he can organize work according to his will, along with giving feedback to higher officials. The more these characteristics are in the job the more motivating it becomes. For the employees motivational value comes from job enrichment due to the feeling of employees that work is now more meaningful, due to the fact that they are more responsible for outcomes. These changes therefore satisfy the employees need for growth, work motivation, work satisfaction, and work effectiveness (Schuler, 2008). Remuneration and Benefits The HR department has also the responsibility of setting employee remuneration, which is the financial payment to employees for their work. This can be used in influencing employee behaviour, it is necessary for the organization to reward employees fairly. If the employee feels he hasn’t been rewarded well he will be de-motivated. Organizations work towards keeping their skilled employee the time, they do not want to lose employee who have worked with them and are good at what they do, also for motivating employees to be more effective and efficient at work HR department tries to best set the wages inline with the expectance of the employees. Well paid employees feel more satisfied with work and are also more willing to give something extra to the organization, in long term this can increase employee commitment and built a trusted relationship between employee and employer. The other option which the HR department uses in influencing behaviour is the benefit system. Employee benefits are does part of the process that reward in addition to cash pay. These benefits may include insurance, medical, pension schemes, a company car or loan, and paid holidays. These benefits care for personal security and needs (Armstrong, 2000). The aim of employee benefits is to contribute to a competitive reward package, also to provide tax-efficient method of remuneration. This is also to provide for the employees need and also for their request for financial help, thus demonstrating that they are part of a caring organization so in turn they can be motivated to carry out work. This also increases the commitment of employee to the organization. The benefit strategy should be directed at the goal of achieving objectives of the business by ensuring it has high quality, committed people in their ranks. A flexible benefit plan helps employee choose between two or more benefits. An employee will be more motivated if he has a say in his benefit package, this way employee can gain better appreciation for the value of benefit he is be being rewarded. Benefits can also be aligned with work, such as giving paid holidays, this can be helpful in achieving short term targets of organization (Robert, 2008). The HR department has therefore the responsibility to work out the best reward system so that employees can benefit and feel satisfied with their work effort (Armstrong, 2000). Training and Development Training and developing employees so that they can deliver their best to the organization is one of the main functions of HR department. The HR department has to continuously work towards perfecting their work force, training them so that they can adapt to the changing business environment. HR department uses training and development to bring about a permanent change in the employees behaviour. Training is defined as helping employee do their current or future work better, where as development involves acquisition of knowledge, skills, personal development, and the right attitude so that the employee is prepared for future opportunities (Bacal, 1998). Training is used in altering the behaviour of the employee in a direction that will help achieve organizational goals. Training helps employees master their present skills or acquire new skill for the execution of another job. Learning is a part of training which brings about a permanent change in employee behaviour. Before training the personal analysis should be conducted so that it could be determined who requires training and their readiness for training. For training to be successful immediate reinforcement is needed so that appropriate behaviour is learned. The learner must be awarded in ways which satisfy needs, such as pay, promotion and recognition. Standards of performance should be set for the employee, as when these standards are met the employee gets a feeling of accomplishment. The training should be meaningful and should also give employee enough time to absorb. The employee should be encouraged to practise the behaviour again and again so that he could perfect his skills. This way a permanent change is brought about in the employee’s behaviour. There are different approaches to training, which includes on-job training and behavioural modelling. On-job training is that an employee is placed in a real work situation and is showed the job and tricks of the trade by a supervisor. This method widely uses the employee’s learning capability to understand and retain the task execution. The other method is behaviour modelling. This is used in increasing interpersonal skills by observing an experienced employee. These methods help bring about a favourable response from the employee. For this training and development procedure to be successful the HR department should ensure that training is linked to business objectives so that everyone is pointed in the same direction. The training should be focused on outcomes and not activities, also allowing employees enough time to adapt. Training should be motivating so that employee expectations could be met, of providing career pathways, increasing job satisfaction and also improving job security. Employee must be shown how to acquire new competencies and what are the benefits of gaining them The HR department should ensure that not only the organizations needs are respected but also the employees and what they want to achieve, so that positive change is brought about in behaviour. Performance Management and Appraisal The HR department knows how much it costs to acquire employees and retain them as a good working unit, they want to be sure that the outlay on staff is achieving an appropriate return. For this HR departments concentrates on performance management and appraisal, which is about creating relationships and ensuring effective communication within the organization. HR department cite as a process which ensures success for everyone, valuing the effort put in by the employees and also influencing and motivating them for their hard work, they feel it helps asses the employees so that they could be rewarded fairly. This is a communication process between employees and their supervisors, which helps built a clear understanding about the job function and what the employee is expected to do. How they can work together to build, improve or sustain employee’s positive conduct. It focuses on employee’s achievement on the preset objectives and how he can bring about a change in his behaviour so that necessary results can be achieved, with continued reviewing of performance against the plans the HR department ensures that objectives are met. The process of discussing work in progress, and how employees can enhance productivity with regular feedback can help determine where the employees stand, and also assess their accomplishments. Appraising an employees job makes them aware of how a task should be executed, also giving them a degree of empowerment which is the ability to make day-to-day decisions. It also helps employees on how to enhance performance, which in turn presents a chance to the employee to develop new skills and appropriate attitude towards work. If the employee understands his duties he can act more freely within the given framework. Performance appraisal is a part of performance management, it is a judgemental process of the performance of the employee on job. It is mainly done for the employees behaviour is moulded according to the companies determined objectives (Bacal, 1999). Performance appraisal brings about favourable attitude of the employee, in the form of commitment and motivation. This is why it important to appraise employees, its importance can be identified as a development to clarify why it is essential to have an effective training program (Banfield, 2008). It is also important for reward purpose as it identifies the deserving employee to receive a reward and who should be trained to achieve high efficiency. Employee motivation is the key behind his compliance to change and this appraisal system stimulates effort to perform better. Employees can be given a legally acceptable reason for promotion or reward and also in case of discharge or transfer so that the employee can’t feel of being treated unfairly. The basic compliance to change of behaviour for an employee comes with monetary incentives, therefore this system helps identify what to pay the employee. This system also encourages communication so that a sense of trust builds between the employee and supervisor, this can be beneficial for the organization as they can work towards carefully shaping the behaviour of the employee so that needs of the organization are catered for, as the employee will respect his supervisor’s decision and will work with commitment and desire. Conclusion The employees are the most important resource of any organization, their commitment and sincerity to the organizations objectives is much sought after. The HR department’s role in this is significant as it sets a benchmark of high standards for the organizations employees. Ensuring that change in behaviour they want is achieved in manner which is acceptable to the employee. The HR department first has to identify the lacking, if it’s concerned with the job they can use job design to influence employee behaviour as an inappropriate person/job fit can be de-motivating for the employee and costly for the organization. If they feel their employees value monetary benefits more they can alter their remuneration and benefit packages according to the need of the employee to generate a feeling of importance in the employee, thus motivating them to achieve organizational goals. The HR department can also analyse the skill level and competence of the employee so that any lacking can then be corrected by employing training and development methods, thus equipping their workforce with new skills and knowledge, readying them to face the challenging business environment. Lastly HR department can use performance management to mould the behaviour of employee according to the need of the organization. With a continuous judgmental system employee motivation and work efficiency can be measured, and then rewarded accordingly. A motivated workforce is the key to any achievement for the organization, so this is what organizations should continuously strive to achieve employing the discussed techniques to influence them.

Existentialism In A Country Doctor English Literature Essay

Existentialism In A Country Doctor English Literature Essay In A Country Doctor, several principles of existentialism are demonstrated via changes that takes place in doctor, the main character. Being an anti-existential character, the doctor has no control upon the situations that he is in. Even when he is given the opportunity to choose, he selects to fulfill the expectation his community has upon him then doing what he truly feels needs to be accomplished. However, a gradual transition takes place as he is faced with a number of absurd situations. Anxiety dominates him as things become unmanageable. Subsequently, notion of selfish human nature disgusts him which causes him to feel alienated from the entire community that he belongs to. Thus, plot and character development plays a major role in illustrating the existentialist point of view upon life as revealed in the story. Absurdity of events that occur to the main character causes him to feel helpless and insignificant. As mentioned previously, the doctor is an anti-existential character in the beginning of the story. Even when in position where he can decide upon what to do, he habitually does what the society expects of him. For instance, he abandons Rose in the hands of the groom whose sexual intent for her is obvious in order to save a patient. This demonstrates his tendency to primarily accomplish his responsibilities as a doctor no matter in what horrid problems he may find himself at the time. However, he grows tired of adhering to such obligation as series of strange events occur. A groom who is found in supposedly empty sty provides him with two horses in extremely good condition. And because the groom enables him to accomplish his duty as a doctor, the doctor loses his ability to prevent the groom from approaching Rose by making him accompany him on his journey. Despite his concern for Rose, the doctor has no choice but to leave her with the groom. This frustrates the main character to the extent where he cannot properly examine the patient. Further absurdities ensue as choir sings a song of his insignificance as a human being and people lay him in bed with the patient whose illness he cannot cure. And how is it that he happens to have a patient in such horrid weather right after his horse died? Endless continuation of the absurd events over which he has no control causes him to be upset. In the end, he finally makes a choice by running away- a shift toward existentialism. As shown, strange events that consist the plot reveals absurdity and the importance of having control of ones life. One of the characteristics of the main character that hints of existentialism is anxiety. The first indications of such disposition are the short sentences that consist the beginning of the story. This denotes his frustration at the difficult situation that he is in. Also, he feels powerless and dejected as revealed in the sentence but it was hopeless, I knew it, and stood there forlornly. Of course, who would lend a horse to such a journey? Even when he arrives at the patients house, his negative feelings do not disappear. He behaves passively as if he does not want to be there. For example, he permits the patient to take my fur coat from me, and he yields and drinks from the rum he has been given. Furthermore, he constantly worries about Rose and notices little details such as horses putting their heads in and out through the window. Due to such distractions clouding his mind, he is unable to check his patient properly. He first decides that the patient is fine as shown in the stat ement what I already knew, the boy was quite sound. As a matter of fact, the invalid is well beyond aids. And this is when he commences to question himself. Why is he doing this? What is the point of him trying so hard to have control over matters that keep on slipping through his fingers? Who is he doing this for? He realizes that he does not want to dwell in such situation and ends up running away. As indicated, the uncertainty, helplessness, and anxiety that is brought upon the main character by the absurd situation he faces illustrate existentialism. Development of sense of alienation in the main character further reveals existentialism. When the main character is in desperate need for the horses, no one helps him but the groom. However, this assistance is not offered to the doctor out of goodness of the grooms heart; the grooms true purpose lies in sexual approach to Rose. The main character is disgusted by the selfishness of human nature. Unfortunately, matters do not improve when he faces the patient and the community. The doctor thinks that despite the sacrifice he makes by choosing between Rose and the patient, people are feeling no gratitude for him. Due to such reason he comments that the whole district made my life a torment. He feels even more isolated when his thought reaches to the notion that he means nothing to the people but tools for saving their lives. This is when the doctor realizes that he does not have to be what other people expect him to be. As a result, he ceases adhering to his responsibilities and escapes . In this way, alienation manifests existentialism by assisting the main character in discovering perverse human nature and meaninglessness of life. In conclusion, absurdity, anxiety, and alienation accentuate upon the existentialist view of meaningless, desolate life in A Country Doctor. This is well demonstrated through the process of transformation of the main character from an anti-existential character to an existential character. Series of strange uncontrollable events that constitute the plot of the story triggers the main character to feel insignificant. Subsequently, two emotions that are strongly developed in the main character throughout the story denote the pointlessness of life. Anxiety caused by the continued absurd events induce the main character to pose questions upon whether it is worthwhile living as a being that other people desire him to be. Moreover, alienation that he feels from people who do not value him as a human being acts as a key factor that changes him into an existential character. Thus, A Country Doctor has a plot and development of the main character that emphasizes upon existentialism.

Abandoned Oil Wells End of Field Life

Abandoned Oil Wells End of Field Life ABSTRACT As petroleum, production continues to decline in many parts of the globe, more operators are seeing well abandonment as a reality. Drilled wells are plugged and abandoned for different reasons of which the typical and operational reason is that the well has reached its economic limit or when drilled it was found to be a dry hole. (refer). According to Ide, T., et al 2006, well bore is taken to be high fluid transmittal pathway. Even with the current procedure of sealing and abandonment, individual wells have the tendency to loose their integrity due to various factors, which include but not limited to poor cementation, poor or ineffective plugging, and increase in formation pressure after abandonment, corrosion of casing (refer). Safe and economical well abandonment are important to the industry from environmental and financial standpoints. Improper abandonment can require re-abandonment procedures to mitigate environmental contamination or to comply with updated regulations, causing an increased financial burden on the operator. 1. Introduction 1.1 BACKGROUND All wells drilled have a distinct life cycle with respect to its cost, duration, recovery, and value. Although these characteristics and attributes are specific to an individual drilled well, all producing wells pass through the same initial and final state, beginning with completion and ending with abandonment. After the drilling stage of a well and the target depth is reached, a decision to complete the well is made based on the reservoir attributes: is the well dry or is the hydrocarbon in place of economic value. Ultimately, every well becomes dormant because of reduced economic returns or technical problem. When a well stops producing, it either may be shut-in (SI), temporary abandoned (TA) or permanently abandoned (pa). With ageing fields fast approaching their economic limit, abandonment is becoming increasingly frequent and many operators have to modify their abandonment procedure to fit the Wellbore condition and make certain that abandoned wells remain permanently sealed and prevent commingling while balancing the environmental objectives of abandonment and cost of actual abandonment. Wells, which are not abandoned appropriately, can become a major hazard to the underground source of drinking water and possibly the aquatic environment [8] Shut in status (SI) When a well is shut-in it is still flowing but its Christmas tree, SV, wing valves are all closed. Usually a well is shut-in if there is a technical or operational problem, which is believed to be temporary. There is no maximum time for a well to remain in shut-in status as long as it is regularly maintained according to regulatory requirement and procedures. Temporary abandonment status (TA) A well is said to be temporarily abandoned when the wellhead is removed and the producing interval is isolated with a plug and the casing is plugged below the mud line. REASONS FOR ABANDONMENT There are various reasons why a well is abandoned, these are: END OF FIELD LIFE ABANDONMENT Drilled wells must at one point in time be abandoned. Before a well reaches the point at which it has to be abandoned it passes through various stages in its life cycle; it begins with the survey and exploitation of an area for signs on hydrocarbon [1]. This leads to a rewarding and exciting discovery of an accumulation of hydrocarbon deposit. This is followed by the acquired Data Processing stage and finally the drilling process. During drilling, the well is created by the use of drill bit and cased off at specific as drilling progresses. Another fulfilling target is reached when the first hydrocarbon is produced a process which unfortunately eventually proceeds the declining period where the rate of hydrocarbon production decreases. However, successful enhanced oil recovery techniques often than not make this stage rewarding financially as it extends the life of the well [1]. When all enhanced oil recovery technique has been employed, and the cost of producing the well is no longer economically viable, the next process is abandonment; a stage not so welcomed by most operators as it means the cessation of production. Dry hole Abandonment A drilled well is also abandoned when after drilling, the hole was found to be a dry hole. Though abandonment is meant to be a permanent termination, the effect is felt for many years more than that of the short producing life of the well. The main goal of any plugging and abandonment is to provide a permanent and effective isolation of fluids all along the subsurface formation in the different layers where they were enclosed prior to plugging, thereby preventing fluid migration and reduce environmental risks of contamination and prevent costly remedial jobs [1]. To achieve this several significant intervals of the well must be filled and tightly closed with a sealant material from bottom hole to the surface with special attention paid to the production interval [4] and zones of high differential pressure and temperature. The material used for plugging differ depending on what type of well is being abandoned, for oil and gas well the material used is normally cement based materials, for water well, cement based as well as bentonite can be used to isolate the different intervals[4][ PUT UNDER CEMENT PLUG CHARACTERISTICS UNDERE INTEGRITY OF ABANDONED WELLS. The integrity of the abandoned well can fail for very many reaso ns such as plug failure, poor slurry design etc. A cement plug can fail to set at the desired location as cement slurry often has the tendency to fall through the lighter drilling fluid below it [9]. Failure can also be as a result of downhole changes which may occur after the well has been abandoned [8]. Over the years, techniques for drilling and completion of hydrocarbon wells have continued to evolve. This drive for new technology for hydrocarbon recovery is due to the need to maximize hydrocarbon recovery while protecting the environment [4]. The evolution of well abandonment techniques has been much slower than that of drilling and completion. This is because abandonment is considered a sunk cost [4]. Project Objective The objectives of this thesis is to review the factors which contribute to the overall integrity of abandoned wells. These include, well parameters, cement placement techniques, casing integrity. These play an important role in the design, construction and actual execution of the abandonment project. In the abandonment of wells, the factors that contribute to the integrity differ depending on the wells. This is because each well is a unique entity and hence has to have independent well abandonment design. PROJECT METHODOLOGY In this work I intend to talk about For instance, in a well where a fish is lost in hole the abandonment design has to taken into consideration remedial action or ways to set the cement plug as there may be no access to the bottom hole to set a bottom plug in the sump. Abandoned wells can be a cause of concern due to their potential to act as path for flow between formations, which under normal circumstance are isolated including underground sources of drinking water, of great concern are those abandonments with faulty plugs, compromised casing and those having cracks in the cement [7]. This work is aimed at highlighting the different factors which contribute to the integrity of an abandoned well. ( reorder and rewrite) Chapter 2 Literature review Well abandonment has come a long way since the first discovery of oil and gas, with the increasing awareness of the importance of environmental protection, the need to improve the processes of abandonment has now become a major concern for many operators, as abandoned wells are considered a possible conduit for fluid flow between different formations. According to C. H. Kelm et al, the objective of abandonment of a well must taken into consideration the need to do so in a best practices manner by examining the following fundamental aim of any abandonment process; The need to protect any hydrocarbon left in the pay zone of the formation drilled. The need to preserve and prevent contamination of freshwater zones (for onshore rigs) penetrated during the course of drilling the well. Avert of any contamination of the surface environment. For instance, in the case of vegetation, air pollution and marine environment. The need to abide by all regulatory requirements stated in during the abandonment. In the past years many papers has been published on areas ranging from alternative plugging technique, self healing and expandable cement, improved cement slurry design, placement technique with the aim to reduce the cost of abandonment and improve the abandonment. Abandoned well in an oil field are sealed using a plugging material according to regulatory requirements. A perfect example of a plugging material in the ideal sense according to D.G Calvert et al 1994 is one, which can be pumped down the drilled hole, has the ability to harden in a reasonable time, and bond with the walls of the drilled formation and casing in order to prevent fluid flow from one formation to another. While regulations vary from place to place, the general practice involves plugging the Wellbore with a Portland cement material specifically designed for the isolation purpose. In his review of plugging and abandonment techniques, D. G. Calvert et al, stated that the cement mixture used in oil and gas vary d epending on the type of hole is to be isolated. Very few papers has been published that focuses on the integrity of the actual well after abandonment. Liversidge, D. et al. in his work on permanent plug and abandonment solution for the Northsea he presented case histories of the Brent South field abandonment project done using both class G cement with an expandable agent system and flexible cement according to the current stringent regulation. Cement integrity preservation during well completion, production phases as well as during abandonment is of critical importance for long-term protection. In the past years numerous papers and texts in the area of cement sheath failure, improved flexible and expanding cement and related topics have been published, indicating the increasing need to improve well abandonment and reduce cost. Examples of works published include but not limited to (Bosma et al 2000), (Ravi et al. 2002), (Glessner et al., 2005), (Mainguy et al., 2007), (D. G calvert et al., 1994), (Locolier et al., 2006),( Liversidge et al., 2006). Although many papers have been written, very little work has been done to investigate the cement plug integrity after abandonment. The ascribed cause to this may be that permanent abandonment is considered a non-profit venture. Mainguy M. et al., 2007 carried out an analysis of the probability of failure of cement plugs when subjected to varying compressive and tensile load using an ideal reservoir model designed to suit changes in the downhole condition. In his study he identified that there is a greater tendency for the material used to seal zones for abandonment to fail in wells situated where there is instability in the pressure, temperature and stress state due to changes that occur downhole. He concluded that when the plug is subjected to maximum tensile stress it failed due to the low tensile strength of the conventional class G cement. Though he suggested the use of pre-stressed cement as they adapt more to changes downhole, his work did not cover the problem of rock-cement de-bonding which is a problem that greatly reduces the sealing capacity of cement. In the study done by R.C. Smith et al., 1984, on the successful method of setting cement plug, he investigated the ongoing failures of cement plug s due to the instability caused by the difference between the density of the cement and the drilling mud. In his work, he suggested the use of mud thickened with bentonite before spotting the cement so as to allow a greater density difference. With respect to the problem of controlling the direction of flow of the cement slurry a diverter placed at the end of the tubing to help divert the direction of flow and improve stability. Drilling fluid can also be used as a plugging material by adding a cementitous additive. The additive can either be fly ash of blast furnace slag which have the characteristics of a cement as they harden when the mixed with water. Cement is not naturally occurring but manmade and like any other manmade material, it is expected to age, wear-off, and, degrade overtime under different subsurface condition, which may differ from the time it was initially set [W. Zhou et. al 2005]. Plugging oil well is a common operation, which is increasing as mature field reach the end of their producing life. In general, plugging and abandonment of a well involves filling a certain length of casing or open hole with a volume of cement mixture designed for it in order to provide adequate sealing against upward migration of formation fluid. After the cement plug is place in the desired location it is left to harden over time. The placement of the cement plug is a major part of abandonment, as failure of this will cause commingling of fluids from different formation. The setting and spotting of cement plugs can be done in various ways depending on the wellbore condition and regulatory requirement. A review of the worldwide acceptable plugging procedure shows the a minimum of three cement plugs is required of which two are, the first plug is put in place by squeezing the cement plug through the perforation into the former producing zone in order to seal off any further influx of reservoir fluid into the Wellbore[2]. The second plug is usually set towards the middle of the Wellbore or near a protective casing shoe. Finally the third plug is set about200- 300ft below the mud line. In general, the length of a plug ranges from 100to 200ft depending on the regulatory requirements. Any additional plug set is dependent on the well bore condition. Although observations and studies show that cement plugs have the ability to perform as expected for up to several decades, uncertainty exists that the material can maintain its isolation integrity for several thousands of years. Recent study shows that abandoned wells in which CO2 was used in the enhanced oil recovery technique prior to abandonment have the potential to leak and allow CO2 migration notwithstanding the fact that the well has been properly abandoned [Scherer, G.W et al, 2005]. This is mainly due to corrosion and degradation of the casing and cement. This degradation and corrosion occurs when carbonic acid formed from the dissolution of CO2 in brine attacks the cement and casing [Scherer, G.W et al, 2005] a process, which is dependent on the temperature of the formation, cement composition, brine and the rock mechanics and composition. Potential leakage of reservoir fluids through degraded cement plugs is hence of primary concern. Various work on inter-formational flow shows that there is still the possibility of flow between formations even with a successful plugging of different interval. This case can arise when the abandoned well is near an active well. Javandel et al developed the first analytical model; their model showed the possible of flow to an upper formation in response to a lower injection pressure build up in a lower formation. Striz and wiggings carried out further work by developing a coupled model to predict flow using a steady state approach to create a transient flow. This model can be used to developed abandoned fluid flow using available field data. In recent studies, statistics show that in the US one in every three well drilled for hydrocarbon is dry and have to be plugged and abandoned[D.G Calvert, et al 1994]. Wells are drilled for various reasons ranging from industrial, oil and gas, to municipal uses, but in the end these well have to be abandoned [D.G Calvert, et al 1994]. Some wells were abandoned before any regulation and guidelines were defined, these wells may have either been plugged improperly or not plugged at all and these now poses a threat to the quality of the groundwater. For the aim of regulating bodies to be achieved i.e. achieving underground water protect and hence environmental protect, the operating companies must understand that following the different regulatory requirement alone is not sufficient to guarantee a lasting protection of the environment [4]. It is sometimes difficult for operators to abide by the regulatory requirements as well as developing a plan which would both serve to seal off the reservoir and provide long-term protection of the environment while justifying the overall cost in general [4]. Currently there is a high rise in abandonment of ageing and mature field which either have reached their economic limit or are no longer producing (refer). Methods of ABANDONMENT The initial stage of a decommissioning process is the plugging and abandonment of the wells, during this stage, the tubing, casing strings, and, conductors are cut below the mud line and removed, zones are sealed with cement plug to isolate the flow path between the reservoir fluids and other zones as well as the surface. Zones not sealed with cement plug are filled with mud with fluid having the proper weight and consistency to prevent movement of other fluids into the wellbore. Most abandonments follow a general methodology that is adjusted to meet individual well requirements. As procedures can and do change significantly for each well, cement plug design should frequently be attuned to reach minimum wait-on-cement (WOC) times with varying downhole conditions. Near-wellbore geology should be assessed, and the wellbore and annuli properly cleaned to avoid microannuli and poor cement bonding. Traditional techniques include cement squeezes, gel squeezes, and mechanical plugs such as bridge plugs and packers. Cement and gel technologies are mainly used for behind casing repair, and mechanical options are usually confined to plugging the casing. In the general process of abandonment there as basic steps which are followed to ensure successful plug and abandonment program. This includes the planning process, wellbore equipment testing, designing, well geometry assessment. PA PLANNING The most essential decision after when to abandon a well [11] is how. Preparation is a key ingredient in plug and abandonment of a well. In order to abandon a well successfully careful planning and effective plugging and abandonment procedure is crucial to prevent gas or fluids from moving to the surface or to other subsurface formations. In addition to the environmental risks that come with poor seals, corrective plugging may be necessary, increasing the cost and difficulty of abandoning a well. However, operators and service companies have several options for obtaining complete, permanent abandonment. For every well, there is a variation as each well PA is unique and different. The techniques used to achieve this process are generally based on industry practice, research, and conformance with the relevant regulatory compliance requirement. The synthesis of practical knowledge, current technology and regulatory requirements results in the most effective wellbore plugging and abandonment possible. Wellbore equipment testing. A preliminary inspection and survey of the wellhead and wellbore condition is carried out to determine if the valves on the wellhead are in operable condition, if it is found not to be in operable condition they are hot-tapped. The wellbore is surveyed using a slickline unit to check for any obstructions in the well, to confirm measured depth and also to gauge the internal diameter of the tubing. After the survey and removal of the slickline, the annuli and tubing is filled with fluid using a well pump is installed at the wellhead to ascertain an injection rate into the perforations. The tubing and casing are also pressured up to check for integrity. Casing annuli are also pressure tested to check for communication problems between casing strings and to record the test pressure over a period of time. The integrity and reliability of the primary cement is assessed in order to ensure that the cement sheath is still providing isolation across the reservoir and the cap rock. A well control plan is designed to establish reservoir condition and subsequently the contingency responses to any event which may occur during the abandonment process. DESIGN OF A WELL ABANDONMENT PROGRAM Prior to plugging and abandoning a well, a review of the existing well design, record of past work, previous well performance and geologic and reservoir condition is carried out by the operator. The investigation of everything that may relate to the health and safety issues as well as regulatory requirements is also performed, after which the design of the abandonment program begins. The design is done based the existing wellbore and reservoir conditions depending on the findings from the review and investigation. This allows the operator to plan an abandonment program that will satisfy the goal of making the well safe from future resources. PA design needs to be integrated in the planning of the well, and should be considered in a single budget. There are many factors which must be put into consideration in order to design an effective abandonment program , such as, the reservoir status, the integrity of the primary cement, hole cleaning and cement placement technique, the temperatu re and pressure of the well, the type of fluid in the well, the age of the well, the status of the cap rock. Fluid Type Drilled wells produce fluids in liquid and gaseous form, wells which contain sour fluids i.e. sulphur rich would be expected to have accelerated corrosion rates and stress cracking depending on the age and wellbore construction, may impair the capacity to perform plug and abandonment, to mitigate this components which are corrosion resistant can be used. Reservoir status In the design of PA, it is necessary to consider the reservoir status concerning its stability, the current pressure and temperature, the pressure at the initial stages of well development and the permeability of the reservoir both horizontal and vertical. With the information, plug and abandonment is then designed to withstand the pressure of the well after finally reach equilibrium. Cap rock Status It is also necessary to take into consideration the cap rock status i.e. is it still impermeable, has production activities induced fracture or has weathering taken effect. Placing the Plugs After the design and planning of the abandonment program, calculations must be made to determine the amount of cement required and the number of wiper plugs needed to separate the cement plugs from the rest of the fluids. The use of wiper plugs enables the formation of a stable platform on which the cement can be set. A wiper plug is placed in the wellbore, and then a predetermined quantity of cement slurry is pumped on top of it. Because of its weight, the slurry becomes a driving force. The slurry falls to the bottom of the hole, pushing the wiper plug ahead of it and forcing existing air and produced fluids back into the formation. Another plug and perhaps a bit more cement finish the job. In most wells, where there is one permaeble zone, one plug and one volume of cement and the surface plug are all that is needed. In other wells, additional wiper plugs, additional cement slurry, and probably spacers of water or drilling fluid are used consecutively until all of the air and fluid is forced out into the formation, there is zilch pressure on the pipe, and it is apparent from the returns that the whole wellbore is appropriately sealed. The quantity and kind of spacer fluid that can be used is dependent on individual state regulations. The remaining casing at the top of the well is cut off 3 ft below ground level. Along with this general methodology, each region stipulates its own abandonment methods based on field conditions and local regulations as can be seen in the following examples. PA steps in Los Angeles Basin in as follows [12]: The abandonment program is prepared with the support of a qualified engineer. A schematic showing the current mechanical condition of the well is prepared. The geologic condition of the well, including the structure, faulting, and producing zones is assessed. The depth and position of cement plug that will cover the producing zones and any potable water zones if applicable is measured and verified. Choice of whether to use perforating or cavity shots is made. The casing is pressure tested after setting cement retainers. The different equipment required for the job is determined and assembled. Estimate of abandonment/re-abandonment costs is made. In contrast, the steps followed for the Hutton tension-leg platform (TLP) in the East Shetland Basin of the North Sea involved three phases [13]: Perform standalone wireline intervention. Perform drilling unit intervention to set the cement plugs after the first wireline plug has been set. Cut casing 10 ft below the seabed and recover casing stumps. Another abandonment performed in the North Sea followed a different procedure [14]: A permanent cement primary barrier placed immediately above the reservoir. A secondary barrier placed as a back-up to the first barrier. A third barrier then placed near the surface to isolate shallow water-bearing sands. Severed completion tubing and recover wellhead. In Western Canada, the traditional abandonment procedure of wells with casing vent flows included the following: The source of the casing vent flow is estimated or determined. If the source zone is shallower than the producing zone, the producing zone is abandoned. The source zone is perforated. Depending on the feed rate obtained at the estimated source depth, either a bradenhead or a retainer squeeze is performed. Retrievable tools are used as required. Typically, Class G cement with Calcium Chloride and some fluid-loss control is utilized. The slurry is placed and a static squeeze pressure of 7 MPa is attempted. As needed, cement is drilled out and perforations are tested for seal. Often, several attempts are made in order to obtain a static squeeze pressure of 7 Mpa on surface or mitigate the casing vent flow. Techniques for Abandonment The techniques used for plugging and abandonment of drilled well worldwide are generally based on industry practise. These techniques include; Rig Coil tubing unit Rigless abandonment COIL TUBING UNIT The flexibility of coiled tubing has recently been tailored to develop rigless abandonment [15,16]. This method, focuses on harmonizing all well services to accomplish utmost efficiency. Coiled-tubing unit [fig.] abandonment, like any other method, is more effective when appropriate cementing procedure is used from the kick-off of the well, from original zonal isolation with the primary cement sheath to plugging and abandonment. Early prevention of microannulus can help operators obtain a complete final seal. Five main criteria are recommended for optimal abandonment performance with coiled tubing: Mobility; All equipment should be mounted on wheels for increased mobility. Self-sufficiency; the service company provides nearly all activities. Dry location; Fluids are not drained on or near the wellsite. Single operation; the job is completed in one visit to the wellsite. Low mileage; Move time is reduced and transport optimized for maximum efficiency in unit and camp moves. In this abandonment technique geological consideration like the type and condition of the reservoir and caprock formations are take into account. Permanent seals typically must be made between producing zones and at impermeable caprock formations. The condition and configuration of cement, perforations, tubulars, and downhole equipment are also considered. In addition to providing complete, permanent seals, the use of coiled-tubing can help increase abandonment efficiency. This method can provide the following advantages: Increased tripping speeds Increased rig-move efficiency Precise placement of cement plugs; exact spotting of plugs at the interval of interest even in deep well as coil tubing can be reciprocated while pumping. Suitable for use on live wells; it is possible to run CTU for remedial cement squeeze in live well as the wellbore can be controlled using the BOP and stripper assembly. No need to pull production tubing; existing tubing and wellheads do not have to be removed to access the producing interval. Success using the coil tubing method has been recorded in Oman. REGULATORY REQUIREMENT FOR ABANDONMENT IN THE NORTHSEA AND USA In the early years on the oil and gas industry, many wells were drilled and some were found to be dry and subsequently were abandoned without much consideration given to the manner in which the wells were abandoned. Sometimes tree stumps were thrown in the well as a means to plug it [3], during this era the preservation of the groundwater, in general, the environment was not a major issue, and there was no defined regulation by the oil states or agencies. During the tail end of the 1930s different states and agencies in the US started establishing regulations, this defined requirement to ensure better well abandonment [D.G Calvert, et al 1994]. The number of regulation guiding well abandonment has risen along with the rising need to protect the environment in countries around the world. Today most countries have some form of regulation that addresses well abandonment requirement; though these regulations are not uniform and differ from country to country and body to body, they provide a minimum standard for operating companies. For instance for the state of California in the United States of America, the different governing bodies have their own regulations which are as follows; Minerals Management Services (MMS): The basic plugging requirements are found in 30 CFR 250.110 Subpart G. Department of Conservation, Division of Oil: Gas, and Geothermal Resources (DOC) The California Code of Regulations Title 14 Division 2, Chapter 4 beginning with Section 1745 focuses on the fundamental plugging requirements. California State Lands Commission (CSLC): The fundamental plugging requirements in the California Code of Regulations Title 2 Section 2128(q). Abandonment in the North Sea In the North Sea as in US, the regulations differ. The different countries that make up the North Sea have their different governing bodies and subsequently different regulation. The law in the UK, Norway, Denmark and Holland holds the last operator of a well accountable and responsible to pay for all the cost incurred in permanently abandoning the well. It also holds them accountable for any leakage and any clean up that may be required in the event of a leak. Abandonment programs in the Northsea are designed to meet the guidelines for abandonment issued by the operation association or government. For the UK sector of the north sea, abandonment guidelines is issued by the UKOOA, similarly for the Norwegian sector the guidelines are contained in the NORSOK/PTIL D-010 standard and for the Netherlands it is contained in the Dutch Mining Abandoned Oil Wells End of Field Life Abandoned Oil Wells End of Field Life ABSTRACT As petroleum, production continues to decline in many parts of the globe, more operators are seeing well abandonment as a reality. Drilled wells are plugged and abandoned for different reasons of which the typical and operational reason is that the well has reached its economic limit or when drilled it was found to be a dry hole. (refer). According to Ide, T., et al 2006, well bore is taken to be high fluid transmittal pathway. Even with the current procedure of sealing and abandonment, individual wells have the tendency to loose their integrity due to various factors, which include but not limited to poor cementation, poor or ineffective plugging, and increase in formation pressure after abandonment, corrosion of casing (refer). Safe and economical well abandonment are important to the industry from environmental and financial standpoints. Improper abandonment can require re-abandonment procedures to mitigate environmental contamination or to comply with updated regulations, causing an increased financial burden on the operator. 1. Introduction 1.1 BACKGROUND All wells drilled have a distinct life cycle with respect to its cost, duration, recovery, and value. Although these characteristics and attributes are specific to an individual drilled well, all producing wells pass through the same initial and final state, beginning with completion and ending with abandonment. After the drilling stage of a well and the target depth is reached, a decision to complete the well is made based on the reservoir attributes: is the well dry or is the hydrocarbon in place of economic value. Ultimately, every well becomes dormant because of reduced economic returns or technical problem. When a well stops producing, it either may be shut-in (SI), temporary abandoned (TA) or permanently abandoned (pa). With ageing fields fast approaching their economic limit, abandonment is becoming increasingly frequent and many operators have to modify their abandonment procedure to fit the Wellbore condition and make certain that abandoned wells remain permanently sealed and prevent commingling while balancing the environmental objectives of abandonment and cost of actual abandonment. Wells, which are not abandoned appropriately, can become a major hazard to the underground source of drinking water and possibly the aquatic environment [8] Shut in status (SI) When a well is shut-in it is still flowing but its Christmas tree, SV, wing valves are all closed. Usually a well is shut-in if there is a technical or operational problem, which is believed to be temporary. There is no maximum time for a well to remain in shut-in status as long as it is regularly maintained according to regulatory requirement and procedures. Temporary abandonment status (TA) A well is said to be temporarily abandoned when the wellhead is removed and the producing interval is isolated with a plug and the casing is plugged below the mud line. REASONS FOR ABANDONMENT There are various reasons why a well is abandoned, these are: END OF FIELD LIFE ABANDONMENT Drilled wells must at one point in time be abandoned. Before a well reaches the point at which it has to be abandoned it passes through various stages in its life cycle; it begins with the survey and exploitation of an area for signs on hydrocarbon [1]. This leads to a rewarding and exciting discovery of an accumulation of hydrocarbon deposit. This is followed by the acquired Data Processing stage and finally the drilling process. During drilling, the well is created by the use of drill bit and cased off at specific as drilling progresses. Another fulfilling target is reached when the first hydrocarbon is produced a process which unfortunately eventually proceeds the declining period where the rate of hydrocarbon production decreases. However, successful enhanced oil recovery techniques often than not make this stage rewarding financially as it extends the life of the well [1]. When all enhanced oil recovery technique has been employed, and the cost of producing the well is no longer economically viable, the next process is abandonment; a stage not so welcomed by most operators as it means the cessation of production. Dry hole Abandonment A drilled well is also abandoned when after drilling, the hole was found to be a dry hole. Though abandonment is meant to be a permanent termination, the effect is felt for many years more than that of the short producing life of the well. The main goal of any plugging and abandonment is to provide a permanent and effective isolation of fluids all along the subsurface formation in the different layers where they were enclosed prior to plugging, thereby preventing fluid migration and reduce environmental risks of contamination and prevent costly remedial jobs [1]. To achieve this several significant intervals of the well must be filled and tightly closed with a sealant material from bottom hole to the surface with special attention paid to the production interval [4] and zones of high differential pressure and temperature. The material used for plugging differ depending on what type of well is being abandoned, for oil and gas well the material used is normally cement based materials, for water well, cement based as well as bentonite can be used to isolate the different intervals[4][ PUT UNDER CEMENT PLUG CHARACTERISTICS UNDERE INTEGRITY OF ABANDONED WELLS. The integrity of the abandoned well can fail for very many reaso ns such as plug failure, poor slurry design etc. A cement plug can fail to set at the desired location as cement slurry often has the tendency to fall through the lighter drilling fluid below it [9]. Failure can also be as a result of downhole changes which may occur after the well has been abandoned [8]. Over the years, techniques for drilling and completion of hydrocarbon wells have continued to evolve. This drive for new technology for hydrocarbon recovery is due to the need to maximize hydrocarbon recovery while protecting the environment [4]. The evolution of well abandonment techniques has been much slower than that of drilling and completion. This is because abandonment is considered a sunk cost [4]. Project Objective The objectives of this thesis is to review the factors which contribute to the overall integrity of abandoned wells. These include, well parameters, cement placement techniques, casing integrity. These play an important role in the design, construction and actual execution of the abandonment project. In the abandonment of wells, the factors that contribute to the integrity differ depending on the wells. This is because each well is a unique entity and hence has to have independent well abandonment design. PROJECT METHODOLOGY In this work I intend to talk about For instance, in a well where a fish is lost in hole the abandonment design has to taken into consideration remedial action or ways to set the cement plug as there may be no access to the bottom hole to set a bottom plug in the sump. Abandoned wells can be a cause of concern due to their potential to act as path for flow between formations, which under normal circumstance are isolated including underground sources of drinking water, of great concern are those abandonments with faulty plugs, compromised casing and those having cracks in the cement [7]. This work is aimed at highlighting the different factors which contribute to the integrity of an abandoned well. ( reorder and rewrite) Chapter 2 Literature review Well abandonment has come a long way since the first discovery of oil and gas, with the increasing awareness of the importance of environmental protection, the need to improve the processes of abandonment has now become a major concern for many operators, as abandoned wells are considered a possible conduit for fluid flow between different formations. According to C. H. Kelm et al, the objective of abandonment of a well must taken into consideration the need to do so in a best practices manner by examining the following fundamental aim of any abandonment process; The need to protect any hydrocarbon left in the pay zone of the formation drilled. The need to preserve and prevent contamination of freshwater zones (for onshore rigs) penetrated during the course of drilling the well. Avert of any contamination of the surface environment. For instance, in the case of vegetation, air pollution and marine environment. The need to abide by all regulatory requirements stated in during the abandonment. In the past years many papers has been published on areas ranging from alternative plugging technique, self healing and expandable cement, improved cement slurry design, placement technique with the aim to reduce the cost of abandonment and improve the abandonment. Abandoned well in an oil field are sealed using a plugging material according to regulatory requirements. A perfect example of a plugging material in the ideal sense according to D.G Calvert et al 1994 is one, which can be pumped down the drilled hole, has the ability to harden in a reasonable time, and bond with the walls of the drilled formation and casing in order to prevent fluid flow from one formation to another. While regulations vary from place to place, the general practice involves plugging the Wellbore with a Portland cement material specifically designed for the isolation purpose. In his review of plugging and abandonment techniques, D. G. Calvert et al, stated that the cement mixture used in oil and gas vary d epending on the type of hole is to be isolated. Very few papers has been published that focuses on the integrity of the actual well after abandonment. Liversidge, D. et al. in his work on permanent plug and abandonment solution for the Northsea he presented case histories of the Brent South field abandonment project done using both class G cement with an expandable agent system and flexible cement according to the current stringent regulation. Cement integrity preservation during well completion, production phases as well as during abandonment is of critical importance for long-term protection. In the past years numerous papers and texts in the area of cement sheath failure, improved flexible and expanding cement and related topics have been published, indicating the increasing need to improve well abandonment and reduce cost. Examples of works published include but not limited to (Bosma et al 2000), (Ravi et al. 2002), (Glessner et al., 2005), (Mainguy et al., 2007), (D. G calvert et al., 1994), (Locolier et al., 2006),( Liversidge et al., 2006). Although many papers have been written, very little work has been done to investigate the cement plug integrity after abandonment. The ascribed cause to this may be that permanent abandonment is considered a non-profit venture. Mainguy M. et al., 2007 carried out an analysis of the probability of failure of cement plugs when subjected to varying compressive and tensile load using an ideal reservoir model designed to suit changes in the downhole condition. In his study he identified that there is a greater tendency for the material used to seal zones for abandonment to fail in wells situated where there is instability in the pressure, temperature and stress state due to changes that occur downhole. He concluded that when the plug is subjected to maximum tensile stress it failed due to the low tensile strength of the conventional class G cement. Though he suggested the use of pre-stressed cement as they adapt more to changes downhole, his work did not cover the problem of rock-cement de-bonding which is a problem that greatly reduces the sealing capacity of cement. In the study done by R.C. Smith et al., 1984, on the successful method of setting cement plug, he investigated the ongoing failures of cement plug s due to the instability caused by the difference between the density of the cement and the drilling mud. In his work, he suggested the use of mud thickened with bentonite before spotting the cement so as to allow a greater density difference. With respect to the problem of controlling the direction of flow of the cement slurry a diverter placed at the end of the tubing to help divert the direction of flow and improve stability. Drilling fluid can also be used as a plugging material by adding a cementitous additive. The additive can either be fly ash of blast furnace slag which have the characteristics of a cement as they harden when the mixed with water. Cement is not naturally occurring but manmade and like any other manmade material, it is expected to age, wear-off, and, degrade overtime under different subsurface condition, which may differ from the time it was initially set [W. Zhou et. al 2005]. Plugging oil well is a common operation, which is increasing as mature field reach the end of their producing life. In general, plugging and abandonment of a well involves filling a certain length of casing or open hole with a volume of cement mixture designed for it in order to provide adequate sealing against upward migration of formation fluid. After the cement plug is place in the desired location it is left to harden over time. The placement of the cement plug is a major part of abandonment, as failure of this will cause commingling of fluids from different formation. The setting and spotting of cement plugs can be done in various ways depending on the wellbore condition and regulatory requirement. A review of the worldwide acceptable plugging procedure shows the a minimum of three cement plugs is required of which two are, the first plug is put in place by squeezing the cement plug through the perforation into the former producing zone in order to seal off any further influx of reservoir fluid into the Wellbore[2]. The second plug is usually set towards the middle of the Wellbore or near a protective casing shoe. Finally the third plug is set about200- 300ft below the mud line. In general, the length of a plug ranges from 100to 200ft depending on the regulatory requirements. Any additional plug set is dependent on the well bore condition. Although observations and studies show that cement plugs have the ability to perform as expected for up to several decades, uncertainty exists that the material can maintain its isolation integrity for several thousands of years. Recent study shows that abandoned wells in which CO2 was used in the enhanced oil recovery technique prior to abandonment have the potential to leak and allow CO2 migration notwithstanding the fact that the well has been properly abandoned [Scherer, G.W et al, 2005]. This is mainly due to corrosion and degradation of the casing and cement. This degradation and corrosion occurs when carbonic acid formed from the dissolution of CO2 in brine attacks the cement and casing [Scherer, G.W et al, 2005] a process, which is dependent on the temperature of the formation, cement composition, brine and the rock mechanics and composition. Potential leakage of reservoir fluids through degraded cement plugs is hence of primary concern. Various work on inter-formational flow shows that there is still the possibility of flow between formations even with a successful plugging of different interval. This case can arise when the abandoned well is near an active well. Javandel et al developed the first analytical model; their model showed the possible of flow to an upper formation in response to a lower injection pressure build up in a lower formation. Striz and wiggings carried out further work by developing a coupled model to predict flow using a steady state approach to create a transient flow. This model can be used to developed abandoned fluid flow using available field data. In recent studies, statistics show that in the US one in every three well drilled for hydrocarbon is dry and have to be plugged and abandoned[D.G Calvert, et al 1994]. Wells are drilled for various reasons ranging from industrial, oil and gas, to municipal uses, but in the end these well have to be abandoned [D.G Calvert, et al 1994]. Some wells were abandoned before any regulation and guidelines were defined, these wells may have either been plugged improperly or not plugged at all and these now poses a threat to the quality of the groundwater. For the aim of regulating bodies to be achieved i.e. achieving underground water protect and hence environmental protect, the operating companies must understand that following the different regulatory requirement alone is not sufficient to guarantee a lasting protection of the environment [4]. It is sometimes difficult for operators to abide by the regulatory requirements as well as developing a plan which would both serve to seal off the reservoir and provide long-term protection of the environment while justifying the overall cost in general [4]. Currently there is a high rise in abandonment of ageing and mature field which either have reached their economic limit or are no longer producing (refer). Methods of ABANDONMENT The initial stage of a decommissioning process is the plugging and abandonment of the wells, during this stage, the tubing, casing strings, and, conductors are cut below the mud line and removed, zones are sealed with cement plug to isolate the flow path between the reservoir fluids and other zones as well as the surface. Zones not sealed with cement plug are filled with mud with fluid having the proper weight and consistency to prevent movement of other fluids into the wellbore. Most abandonments follow a general methodology that is adjusted to meet individual well requirements. As procedures can and do change significantly for each well, cement plug design should frequently be attuned to reach minimum wait-on-cement (WOC) times with varying downhole conditions. Near-wellbore geology should be assessed, and the wellbore and annuli properly cleaned to avoid microannuli and poor cement bonding. Traditional techniques include cement squeezes, gel squeezes, and mechanical plugs such as bridge plugs and packers. Cement and gel technologies are mainly used for behind casing repair, and mechanical options are usually confined to plugging the casing. In the general process of abandonment there as basic steps which are followed to ensure successful plug and abandonment program. This includes the planning process, wellbore equipment testing, designing, well geometry assessment. PA PLANNING The most essential decision after when to abandon a well [11] is how. Preparation is a key ingredient in plug and abandonment of a well. In order to abandon a well successfully careful planning and effective plugging and abandonment procedure is crucial to prevent gas or fluids from moving to the surface or to other subsurface formations. In addition to the environmental risks that come with poor seals, corrective plugging may be necessary, increasing the cost and difficulty of abandoning a well. However, operators and service companies have several options for obtaining complete, permanent abandonment. For every well, there is a variation as each well PA is unique and different. The techniques used to achieve this process are generally based on industry practice, research, and conformance with the relevant regulatory compliance requirement. The synthesis of practical knowledge, current technology and regulatory requirements results in the most effective wellbore plugging and abandonment possible. Wellbore equipment testing. A preliminary inspection and survey of the wellhead and wellbore condition is carried out to determine if the valves on the wellhead are in operable condition, if it is found not to be in operable condition they are hot-tapped. The wellbore is surveyed using a slickline unit to check for any obstructions in the well, to confirm measured depth and also to gauge the internal diameter of the tubing. After the survey and removal of the slickline, the annuli and tubing is filled with fluid using a well pump is installed at the wellhead to ascertain an injection rate into the perforations. The tubing and casing are also pressured up to check for integrity. Casing annuli are also pressure tested to check for communication problems between casing strings and to record the test pressure over a period of time. The integrity and reliability of the primary cement is assessed in order to ensure that the cement sheath is still providing isolation across the reservoir and the cap rock. A well control plan is designed to establish reservoir condition and subsequently the contingency responses to any event which may occur during the abandonment process. DESIGN OF A WELL ABANDONMENT PROGRAM Prior to plugging and abandoning a well, a review of the existing well design, record of past work, previous well performance and geologic and reservoir condition is carried out by the operator. The investigation of everything that may relate to the health and safety issues as well as regulatory requirements is also performed, after which the design of the abandonment program begins. The design is done based the existing wellbore and reservoir conditions depending on the findings from the review and investigation. This allows the operator to plan an abandonment program that will satisfy the goal of making the well safe from future resources. PA design needs to be integrated in the planning of the well, and should be considered in a single budget. There are many factors which must be put into consideration in order to design an effective abandonment program , such as, the reservoir status, the integrity of the primary cement, hole cleaning and cement placement technique, the temperatu re and pressure of the well, the type of fluid in the well, the age of the well, the status of the cap rock. Fluid Type Drilled wells produce fluids in liquid and gaseous form, wells which contain sour fluids i.e. sulphur rich would be expected to have accelerated corrosion rates and stress cracking depending on the age and wellbore construction, may impair the capacity to perform plug and abandonment, to mitigate this components which are corrosion resistant can be used. Reservoir status In the design of PA, it is necessary to consider the reservoir status concerning its stability, the current pressure and temperature, the pressure at the initial stages of well development and the permeability of the reservoir both horizontal and vertical. With the information, plug and abandonment is then designed to withstand the pressure of the well after finally reach equilibrium. Cap rock Status It is also necessary to take into consideration the cap rock status i.e. is it still impermeable, has production activities induced fracture or has weathering taken effect. Placing the Plugs After the design and planning of the abandonment program, calculations must be made to determine the amount of cement required and the number of wiper plugs needed to separate the cement plugs from the rest of the fluids. The use of wiper plugs enables the formation of a stable platform on which the cement can be set. A wiper plug is placed in the wellbore, and then a predetermined quantity of cement slurry is pumped on top of it. Because of its weight, the slurry becomes a driving force. The slurry falls to the bottom of the hole, pushing the wiper plug ahead of it and forcing existing air and produced fluids back into the formation. Another plug and perhaps a bit more cement finish the job. In most wells, where there is one permaeble zone, one plug and one volume of cement and the surface plug are all that is needed. In other wells, additional wiper plugs, additional cement slurry, and probably spacers of water or drilling fluid are used consecutively until all of the air and fluid is forced out into the formation, there is zilch pressure on the pipe, and it is apparent from the returns that the whole wellbore is appropriately sealed. The quantity and kind of spacer fluid that can be used is dependent on individual state regulations. The remaining casing at the top of the well is cut off 3 ft below ground level. Along with this general methodology, each region stipulates its own abandonment methods based on field conditions and local regulations as can be seen in the following examples. PA steps in Los Angeles Basin in as follows [12]: The abandonment program is prepared with the support of a qualified engineer. A schematic showing the current mechanical condition of the well is prepared. The geologic condition of the well, including the structure, faulting, and producing zones is assessed. The depth and position of cement plug that will cover the producing zones and any potable water zones if applicable is measured and verified. Choice of whether to use perforating or cavity shots is made. The casing is pressure tested after setting cement retainers. The different equipment required for the job is determined and assembled. Estimate of abandonment/re-abandonment costs is made. In contrast, the steps followed for the Hutton tension-leg platform (TLP) in the East Shetland Basin of the North Sea involved three phases [13]: Perform standalone wireline intervention. Perform drilling unit intervention to set the cement plugs after the first wireline plug has been set. Cut casing 10 ft below the seabed and recover casing stumps. Another abandonment performed in the North Sea followed a different procedure [14]: A permanent cement primary barrier placed immediately above the reservoir. A secondary barrier placed as a back-up to the first barrier. A third barrier then placed near the surface to isolate shallow water-bearing sands. Severed completion tubing and recover wellhead. In Western Canada, the traditional abandonment procedure of wells with casing vent flows included the following: The source of the casing vent flow is estimated or determined. If the source zone is shallower than the producing zone, the producing zone is abandoned. The source zone is perforated. Depending on the feed rate obtained at the estimated source depth, either a bradenhead or a retainer squeeze is performed. Retrievable tools are used as required. Typically, Class G cement with Calcium Chloride and some fluid-loss control is utilized. The slurry is placed and a static squeeze pressure of 7 MPa is attempted. As needed, cement is drilled out and perforations are tested for seal. Often, several attempts are made in order to obtain a static squeeze pressure of 7 Mpa on surface or mitigate the casing vent flow. Techniques for Abandonment The techniques used for plugging and abandonment of drilled well worldwide are generally based on industry practise. These techniques include; Rig Coil tubing unit Rigless abandonment COIL TUBING UNIT The flexibility of coiled tubing has recently been tailored to develop rigless abandonment [15,16]. This method, focuses on harmonizing all well services to accomplish utmost efficiency. Coiled-tubing unit [fig.] abandonment, like any other method, is more effective when appropriate cementing procedure is used from the kick-off of the well, from original zonal isolation with the primary cement sheath to plugging and abandonment. Early prevention of microannulus can help operators obtain a complete final seal. Five main criteria are recommended for optimal abandonment performance with coiled tubing: Mobility; All equipment should be mounted on wheels for increased mobility. Self-sufficiency; the service company provides nearly all activities. Dry location; Fluids are not drained on or near the wellsite. Single operation; the job is completed in one visit to the wellsite. Low mileage; Move time is reduced and transport optimized for maximum efficiency in unit and camp moves. In this abandonment technique geological consideration like the type and condition of the reservoir and caprock formations are take into account. Permanent seals typically must be made between producing zones and at impermeable caprock formations. The condition and configuration of cement, perforations, tubulars, and downhole equipment are also considered. In addition to providing complete, permanent seals, the use of coiled-tubing can help increase abandonment efficiency. This method can provide the following advantages: Increased tripping speeds Increased rig-move efficiency Precise placement of cement plugs; exact spotting of plugs at the interval of interest even in deep well as coil tubing can be reciprocated while pumping. Suitable for use on live wells; it is possible to run CTU for remedial cement squeeze in live well as the wellbore can be controlled using the BOP and stripper assembly. No need to pull production tubing; existing tubing and wellheads do not have to be removed to access the producing interval. Success using the coil tubing method has been recorded in Oman. REGULATORY REQUIREMENT FOR ABANDONMENT IN THE NORTHSEA AND USA In the early years on the oil and gas industry, many wells were drilled and some were found to be dry and subsequently were abandoned without much consideration given to the manner in which the wells were abandoned. Sometimes tree stumps were thrown in the well as a means to plug it [3], during this era the preservation of the groundwater, in general, the environment was not a major issue, and there was no defined regulation by the oil states or agencies. During the tail end of the 1930s different states and agencies in the US started establishing regulations, this defined requirement to ensure better well abandonment [D.G Calvert, et al 1994]. The number of regulation guiding well abandonment has risen along with the rising need to protect the environment in countries around the world. Today most countries have some form of regulation that addresses well abandonment requirement; though these regulations are not uniform and differ from country to country and body to body, they provide a minimum standard for operating companies. For instance for the state of California in the United States of America, the different governing bodies have their own regulations which are as follows; Minerals Management Services (MMS): The basic plugging requirements are found in 30 CFR 250.110 Subpart G. Department of Conservation, Division of Oil: Gas, and Geothermal Resources (DOC) The California Code of Regulations Title 14 Division 2, Chapter 4 beginning with Section 1745 focuses on the fundamental plugging requirements. California State Lands Commission (CSLC): The fundamental plugging requirements in the California Code of Regulations Title 2 Section 2128(q). Abandonment in the North Sea In the North Sea as in US, the regulations differ. The different countries that make up the North Sea have their different governing bodies and subsequently different regulation. The law in the UK, Norway, Denmark and Holland holds the last operator of a well accountable and responsible to pay for all the cost incurred in permanently abandoning the well. It also holds them accountable for any leakage and any clean up that may be required in the event of a leak. Abandonment programs in the Northsea are designed to meet the guidelines for abandonment issued by the operation association or government. For the UK sector of the north sea, abandonment guidelines is issued by the UKOOA, similarly for the Norwegian sector the guidelines are contained in the NORSOK/PTIL D-010 standard and for the Netherlands it is contained in the Dutch Mining

My Philosophy of Teaching :: Philosophy of Education

Philosophy of Education As a young girl, I would come home from school and pretend to be a teacher. I would sit my younger cousins at small tables and ask them to complete various assignments, such as reading a book or writing the alphabet. We even had lunch in our pretend cafeteria, the dining room, and then we would venture outside for recess. Being a teacher has almost always been a goal of mine. I went through a phase in junior high school where I wanted to become a doctor in order to receive their large salary. One class of biology is all it took for me to realize that my weak stomach could not handle being a doctor. Once, I wanted to become a lawyer for the very same reason; however, after hearing exactly what classes were needed, I quickly changed my mind. I want to become a teacher because of the rewarding experiences, the interacting with young children, and the gaining of new knowledge. With teaching comes many rewarding experiences. Seeing a child’s face light up when they see that they have received a big â€Å"A+† on their assignment can brighten up anyone’s day. During my senior year in high school, I participated in the School to Work Program which allowed me to mentor a first grade teacher for at least three hours a week. At first, I thought that I would sit in the back of the room and watch her teach; but I was wrong. I was basically her teaching assistant for those few hours. She gave me a list of students and had me take one student at a time to have them read a short story or complete a worksheet. The worksheets included math problems, spelling words, and writing. Helping the students with skills that adults take for granted was very rewarding for me. Seeing a child smile because of something I did or said made me so happy. During my last week of mentoring, I was allowed to plan the class’s end of the year party. After all of the planning and a little bit of stress, seeing how much fun the students were having made it all worth it. I know that future teaching will have both pleasant experiences and not so pleasant experiences.

Epic of Gilgamesh :: essays research papers

The Change in Gilgamesh   Ã‚  Ã‚  Ã‚  Ã‚  Ever since the beginning of time, man has learned to mature by trials and tribulations. In the beginning of The Epic of Gilgamesh, the protagonist Gilgamesh appears to be an arrogant person who only cares about himself. He abuses all his powers and takes advantage of people with his physical abilities. Basically in the beginning he thinks that no one on earth is better than him. However, just like all epic poems, the protagonist encounters many challenges that make him a better person. So as the story progresses Gilgamesh slowly starts to change his personality. Various events help transform this tyrant to a humble person.   Ã‚  Ã‚  Ã‚  Ã‚  In the beginning of the book, Gilgamesh appears to be selfish. Gilgamesh’s â€Å"arrogance has no bounds by day or night† (62). Even though he is created by the Gods to be perfect, he misuses his powers and gifts for his own earthly pleasure. He has sexual intercourse with all the virgins of his city even if they are already engaged. Through all Gilgamesh’s imperfections and faults, he learns to change his amoral personality. The friendship of Enkidu helped to change his ways, for only Enkidu, who â€Å"is the strongest of wild creatures,† (66) is a match for Gilgamesh. Through this companionship with Enkidu, Gilgamesh starts to realize his incapabilities and need for his friend. When they fight Humbaba, they both give moral support to each other when the other is scared. Another event that changes Gilgamesh’s character is the death of Enkidu. When Enkidu dies, Gilgamesh goes through the suffering of losing a loved one. Gilgamesh experiences a pain, which no worldly pleasure can ease. By this experience Gilgamesh starts to understand his vulnerability toward death and pain. Losing his best friend causes Gilgamesh to be melancholic. At this point Gilgamesh is humbled by the fact that even he could not escape the wrath of death. Gilgamesh goes from this arrogant king to a lonely grieving person with fear of death in his heart.

Islam in Bed with Europe in “My Son the Fanatic” Essay

My Son the Fanatic is a film that addresses the cultural conflict of both Islamic integration in into Europe and English culture, as well as the relationship that arises between a father and his Muslim son when the child grows up to become an Islamic fundamentalist. (Udayan Prasad, 1997, England; screenplay by Hanif Kureishi) A Pakistani cab driver in a Northern English town has an affair with a prostitute and chauffeurs her and her colleagues to make extra money. When his son becomes an Islamic fundamentalist and joins in an effort to clean up vice in the town, the family’s loyalties and beliefs are tested. This film completely tests the conflict that exists with Islam encountering the European world through migrations and cultural development. Kureishi reveals the core conflict of the reality of English sexual revolution of the 60’s encountering Islamic sexual regression of the present era. In the New York Time’s article â€Å"My Beautiful London†, author Rachel Donadio, notes, â€Å"One of the most revealing insights into Britain’s recent social history comes early in â€Å"My Son the Fanatic,† Hanif Kureishi’s tender and darkly prescient 1997 film. It’s morning in an unnamed city in northern England, and Parvez, a secular Pakistani immigrant taxi driver brilliantly portrayed by Om Puri, watches Farid, his increasingly devout college-age son, sell his electric guitar. † The essence of this cultural conflict between Islamic and Western English culture can be seen in both in how the filmmaker and the central character, the taxi driver Parvez and his son Farid, are raised. They are both brought up by mullahs and nuns alike which reveals the complex nature of multicultural issues a Muslim immigrant might encounter living in Europe. The potential for plot development is endless as the director notes â€Å"You can’t ask people to give up their religion; that would be absurd,† he wrote in The Guardian. But hard-line views might modify â€Å"as they come into contact with other ideas. † That was the essence of â€Å"effective multiculturalism†: not a superficial exchange of festivals and foods driven by liberal guilt, but something else entirely — an encounter with human desires in all their complexity. Higson poses the question in his article â€Å"The Limiting Imagination of National Cinema,† â€Å"When is a cinema ‘national’? , asks Susan Hayward (1993: 1). As if in answer, Crofts delineates several different types of ‘national’ cinema that have emerged in different historical circumstances (1993, 1998). They have performed quite distinct functions in relation to the state (Higson, p63). Hanif Kureishi’s work â€Å"My Son the Fanatic† fits this description exactly. The Film is historical and has an effect on multicultralism through its relevance and relation to England and the happenings of the ‘state. ’ In also being historical, â€Å"My son the Fanatic is also a product of National Cinema†, as â€Å"Proclamations of national cinema are thus in part one form of internal cultural colonialism: it is, of course, the function of institutions—and in this case national cinemas—to pull together diverse and contradictory discourses, to articulate a contradictory unity, to play a part in the hegemonic process of achieving consensus, and containing difference and contradiction Higson p. 139). Islamic law is formally composed of literal translations of Arab tribal customs and ancient Muslim traditions as well as the Koran, and quotes from the Islamic prophet Muhammad as well as his predecessors. â€Å"When you get down to it, there are two types of people in Kureishi’s work: those running toward sex and those running away from it (p. 6)† In the film Parvez’s son Farid notes that he is seeking â€Å"Belief, purity, belonging to the past,† and then he notes â€Å"I won’t bring up my children in this country. † This represents the classh between what is now his fundamentalist beliefs through devotion to Islam and the clash European cultures poses on those beliefs. Farid sees no way both ways of life can exist together. Likewise, Parvez represents the embodiment of a westernized Muslim, so much so that he can’t identitfy with son. In the film this conversation boils up into a conflict in which Parvez begins to beat his son repeatedly, until his son shouts to him â€Å"who’s the fanatic now? † A major motif of the film that Kureishi mentions in his interview, is the concept of old Sharia law and the ancient traditions of the past being re-imposed on a post-sexual revolution present. Kurishi points this intergenerational drama out as ironic when he says, It perplexed me that young people, brought up in secular Britain, would turn to a form of belief that denied them the pleasures of the society in which they lived,(Donp. 7 he goes on to pinpoint that exact issue that faces the relationship for shared for young people concerning Islam and western culture to date when he says, â€Å"the West, the Nietzschean project, has been to drive out religion and to produce a secular society in which men and women make their own values because morality is gone. Then suddenly radical religion returns from the Third World. How can you not laugh at that? How can you not find that a deep historical irony? † This irony Kureishi speaks of is the main theme of the film. In Richard Dyer’s essay The White Man’s Muscle, he talks about stereotypes that have been enforced connecting as far back as the Greek era, and that now dominate film and television basically promoting the superiority of white masculinity. Body hair is animalistic; hair ¬lessness connotes striving above nature. The climax of Gli amori di Ercole has Hercules fighting a giant ape, who has previously behaved in a King Kong-ish way towards Hercules’s beloved Dejanira, stroking her hair and when she screams making as if to rape her; close-ups contrast Hercules’s smooth, hairless muscles with the hairy limbs of this racist archetype. (Dyer) Here Dyer points out how the uppermost essence of masculinity is equated with shaven white muscle, through its very contrast to that of hair apes, who are historically associated with blackness. He acknowledges the racist aspects of this archetype, but also gives notice to the private boys’ club-like tradition that has formed from this prejudice. This mentality demonstrates the epitome of the world in which A state agency for assessing public religious schools had given a top rating to a Muslim school that was advocating a return to the Caliphate; the interior minister at the time, Jack Straw, came under fire for suggesting that it might be difficult for a community-relations functionary to meet with constituents who wear a full veil; an Indian woman living in England was lured back to India and murdered in an honor killing; the archbishop of Canterbury said he thought England might consider making some accommodation for Shariah, or Islamic law. What, I wondered, did Kureishi make of all this? (,p. 7) â€Å"There aren’t any answers to these questions,† he replied. â€Å"They’re just questions that everybody has to engage in and think about. What is it like to make a multicultural society? How far do you go in multiculturalism? Do you have parts of the country under Shariah law, for instance? What would that mean? How does that work? You have to take this stuff seriously. † (p. 7) In sum, â€Å"My Son the Fanatic† is potent with cultural complexity and relevance. The film speaks volumes about current issues facing the Western world today as well as those being posed by, and imposed upon the Middle East. One can’t see this film and overlook the tension brewing between the two cultures of the Muslim world and the Christian European environment in which it finds itself. The film does an excellent job of providing authentic interpretation for a conflict that is undyingly relevant and prevailingly influential in today’s socioeconomic and political climate. Work Cited Bordwell & Thompson â€Å"Film History† 2004 Donadio, Rachel â€Å"My Beautiful London† New York Times August 8, 2008 Dyer, Richard â€Å"The White Man’s Muscles† in White London Higson, & Fowler, Catherine. â€Å"The European Cinema Reader† London New York Ptacek, J. , & Dodge, K. Coping Strategies and Relationship Satisfaction in Couples. The Society for Personality and Social Psychology, 21(1), (1995). 76-84. Savran, David. (1998). â€Å"Taking It Like a Man: White Masculinity, Masochism, and Contemporary American Culture. † 380 pp.

Goodner Brothers Case Study

Q1. Define SWOT analysis with appropriate examples using external resources (200 words) SWOT Analysis, technique credited to Albert Humphrey, is strategic planning method used to evaluate Strengths, Weaknesses, Opportunities and Threats involved in business ventures. 1 It involves 1) Specifying objective 2) Identifying internal and external factors favorable and unfavorable to achieve objective 1 Example – Healthcare Software Company selling high value products 2 Strengths : Internal Characterisitcs of Business that give it an advantage 1 †¢ Highly experienced team, well established, reputable company †¢ High Percentage of Sales from Exports †¢ Knowledge of Advanced technology †¢ Very efficient Processes †¢ Top class service Weaknesses : Internal Characteristics that place it at disadvantage 1 †¢ Customers slow to Upgrade †¢ Complicated Products – need lots of Customisation †¢ Products innovative and market needs to be educated †¢ Technology emphasis within company rather than Marketing emphasis Opporutnities : External chances to impove performance 1 New competitors entering markets †¢ Government spending cut backs †¢ Technology changing fast Theats : External elements that could cause trouble 1 †¢ Population ageing †¢ Environmental issues increasing profile †¢ Healthcare costs rises rapidly †¢ Increased Safety and Risk awareness in healthcare Possible Strategy 2 Invest in marketing skills and knowledge to find new markets for specialist technical knowledge Increase export market to give buffer to Local Government initiatives in healthcare Add more value to customers outbidding new competitors. Emphasis in sales materials to offset new competitors entering market. http://en. wikipedia. org/wiki/SWOT_analysis & http://www. managementstudyguide. com/swot-analysis. htm Copyright  © 2008 – 2012 managementstudyguide. com. All rights reserved. (1) |http://www. rapid-business-intelligence-success. com/sample-swot- analysis. html  © Copyright Syd Stewart 2008 (2)| | |