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Detailed Analysis Of Pressure Drop In A Large Diameter Vertical Pipe
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CHAPTER ONE
INTRODUCTION
1.1 General introduction
Profitable production of oil and gas fields relies on accurate prediction of the multi-phase well
flow. The determination of flowing bottom-hole pressure (BHP) in oil wells is very important
to petroleum engineers. It helps in designing production tubing, determination of artificial lift
requirements and in many other production engineering aspects such as avoiding producing a
well
below its bubble point in the sand-face to maintain completion
stability around the wellbore (Ahmed, 2011). Well fluids above bubble
point pressure exist as a single phase as it is being produced from the
reservoir. However, as they navigate their way through the network of
interconnected pores in the reservoir to the wellbore, there is a
continuous reduction in pressure as overburden stress is gradually
reduced. This phenomenon leads to the liberation of the entrained gas.
As the single-phase fluid rises in the tubing, a critical point is
reached where some of the gases begin to come out of solution along the
length of the pipe. In other words, it changes from single-phase flow to
multi-phase flow.
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ABSRACT - [ Total Page(s): 1 ]With the ever increasing need to optimize production, the accurate understanding of the mechanics of multi-phase flow and its effect on the pressure drop along the oil-well flow string is becoming more pertinent. The efficient design of gas-lift pump, electric submersible pumps, separators, flow strings and other production equipment depends on the accurate prediction of the pressure drop along the flow pipe. Pressure is the energy of the reservoir/well and it is crucial to understand how a chan ... Continue reading---
