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has been cited by the following article:

• TITLE: Research on Pore Pressure-Depth Characteristics in Normal Pressure Reservoir, Bohai Sea Oilfield

  AUTHORS: Pengfei Mu, Qiongyuan Wu, Mingzhe Cui, Geng Qian, Bo Zhang

  KEYWORDS: Bohai Basin, Normal Reservoir Pressure, Wireline Formation Tester, Pressure Coefficient, Inverse Proportion Function

  JOURNAL NAME: Journal of Geoscience and Environment Protection, Vol.10 No.4, April 20, 2022

  ABSTRACT: In normal pressure of reservoir, formation pressure and depth can not fully reflect the linear relationship between the formation pressure with depth, the change rule of reservoir measured formation pressure and often reduced pressure, understanding unclear cause fluid properties. By introducing basic principles of hydrostatics. The relationship between pressure coefficient and mathematical depth is discussed by mathematical induction analysis of measured pressure data of nearly 50 normal pressure reservoirs in Bohai Oilfield. The results show that the reservoir pressure data is linearly distributed with depth, and the pressure coefficient is inversely proportional to depth. When the depth becomes shallower, the pressure coefficient increases and approaches the reservoir level. As the depth increases, the pressure coefficient decreases and approaches the hydrostatic pressure coefficient infinitely. The study can more accurately analyze the reservoir pressure changes, which is helpful to study the oil and water distribution, reservoir connectivity and fluid properties of atmospheric pressure reservoirs.