普通稠油油藏渗流特征实验研究——以新疆油田九4区齐古组油藏为例

doi:10.11743/ogg20120217

Abstract

Abstract:

Heavy oil reservoirs feature in high viscosity,non-Darcy flow,and the existence of start-up pressure.According to the percolation characteristics of heavy oil reservoir,a reasonable method for measuring the start-up pressure was designed.The start-up pressure gradient of oil phase and the relationships between velocity and pressure gradient under irreducible water saturation was studied through various percolation experiments at different viscosity,permeability and temperatures conditions with the natural cores from Xinjiang oilfield.The experimental formulas of start-up pressure gradient,velocity-differential pressure curve parameters,mud logging-derived permeability,and fluid viscosity were established through experimental data regression.These experiments indicate that the start-up pressure of heavy oil reservoir can be determined rapidly and accurately with the expe-rimental method.The influences of oil viscosity on start-up pressure gradient are greater than that of reservoir physical properties.The start-up pressure gradient and velocity-pressure curve parameters are well correlated with the ratio of mud logging-derived permeability to fluid viscosity.

Key words: non-darcy flow, start-up pressure gradient, experimental study, heavy oil reservoir, Xinjiang oilfield

CLC Number:

TE312

Wang Ziqiang, Zhang Daiyan, Yang Jun, Kou Gen, Yang Fei. Experimentals study on percolation characteristics of ordinary heavy oil reservoirs:a case study from the Qigu Formation reservoir in Nine-4 Block of Xinjiang oilfield[J]. Oil & Gas Geology, 2012, 33(2): 302-306.

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Experimentals study on percolation characteristics of ordinary heavy oil reservoirs:a case study from the Qigu Formation reservoir in Nine-4 Block of Xinjiang oilfield

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