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COMPARATIVE STUDY BETWEEN OVERBALANCED AND UNDER BALANCED OIL DRILLING
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- Case No: 166943pw
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ABSRACT - [ Total Page(s): 1 ]The technique used worldwide while drilling is known as overbalanced drilling. Which is defined as the drilling process where the hydrostatic pressure used exceeds the formation pressure. This is done with the main purpose of “killing” the well. However, there are numerous problems that accompany overbalanced drilling. Such problems are differential pipe sticking, loss of circulation, formation damage and other problems. A relatively new technique was introduced, known as underbalanced drilling, where the well is being drilled with a hydrostatic pressure less than that of the formation. Co
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CHAPTER ONE - [ Total Page(s): 1 ]CHAPTER 1: INTRODUCTION1.1 Background study:The main purpose of drilling vertical or horizontal wells is to produce maximum recoverable oil at minimum cost. Traditionally, wells have been drilled overbalance with the hydrostatic pressure of the drilling fluid greater than the pressure in the formation. Unfortunately, drilled wells with overbalance are subject to formation damage with varying degree of severity, depending upon the drilling conditions. This is mainly due to the invasion of drilling fluids during drilling operations. The formation impairment or skin due to drilling fluid invasion ... Continue Reading
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ABSRACT - [ Total Page(s): 1 ]The technique used worldwide while drilling is known as overbalanced drilling. Which is defined as the drilling process where the hydrostatic pressure used exceeds the formation pressure. This is done with the main purpose of “killing” the well. However, there are numerous problems that accompany overbalanced drilling. Such problems are differential pipe sticking, loss of circulation, formation damage and other problems. A relatively new technique was introduced, known as underbalanced drilling, where the well is being drilled with a hydrostatic pressure less than that of the formation. Co
... Continue Reading
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