测井技术2013，Vol.37Issue(4)：360-363,4.
致密气藏岩石渗透率应力敏感对气水两相流动影响实验研究
Gas/water Flowing Ability Influence Experimental Study of Permeability Stress Sensibility in Tight Gas Reservoir
摘要
Abstract
Taking cores of P1s and P2h formation from tight gas reservoir in Changqing oilfield as an example,we discuss the gas/water flowing ability and production influence of permeability stress sensibility based on stress sensitivity experiments.The gas/water relative permeability change trend in different confining pressures is studied.The experiment results show that in the same permeability,when the confining pressures increase,core pore throat and bigger pore deformed with compression,which leads to overall drop of gas/water relative permeability.At the same stress condition,the better the pore structure in the process of gas injection,the stronger the gas/water two phase filtration capacity.Gas driving water distribution curve shows that when the confining pressure is large,the water appears soon in the process of gas driving water process,and the gas driving water effect is worse.In the same confining pressure,the higher the reservoir permeability,the later the water appearance in the process of gas driving water,the better the gas driving water effect.In tight gas reservoir,the absolute value changes caused by stress sensibility are not big,but the relative value changes are great.It influences tight reservoir permeability and gas/water flowing characteristics a lot,and its affect on reservoir productivity can not be ignored.关键词
岩石物理实验/致密气藏/渗透率/应力敏感/气水两相渗流/围压Key words
petrophysical experiment/ tight gas reservoir/permeability/ stress sensibility/gas/water flow/ confining pressure分类
天文与地球科学引用本文复制引用
郑小敏,成志刚,林伟川,董国敏,杨智新..致密气藏岩石渗透率应力敏感对气水两相流动影响实验研究[J].测井技术,2013,37(4):360-363,4.基金项目
中国石油天然气股份有限公司重大科技专项"致密气藏测井采集处理与评价技术研究"(2010E-2304) （2010E-2304）
