注采过程中岩石物性参数变化规律研究  

The change of petrophysical parameters during injection-production process

作　　者：郑旭[1] 汪周华[1] 黄天杰[1] 马占国[1] 

机构地区：[1]西南石油学院,四川成都610500

出　　处：《特种油气藏》2006年第1期86-89,共4页Special Oil & Gas Reservoirs

基　　金：西南石油学院国家重点实验室基金项目资助(项目编号:2004BA616A02)

摘　　要：目前我国许多油气藏采用保压开采措施生产,对部分衰竭油气藏进行储气库改造措施。油气藏流体反复注采,使得孔隙内外压差不断变化,导致岩石压缩系数、孔隙度、渗透率等物性参数也在不断发生变化。本研究采用人造岩心,经过反复升降围压实验对岩石压缩系数、孔隙度及渗透率进行了测试。研究结果表明,岩石物性参数随压力的变化而变化。岩石孔隙度不同,其它参数变化规律不同;渗透率随压力循环升降存在滞后效应。Many oil and gas reservoirs in China are recovered through maintaining pressure, and some depleted reservoirs are stimulated for their gas reserves. Repeated injection and production of reservoir fluids had led to the change of pressure difference inside and outside of pores and the change of rock compressibility, porosity and permeability. This study uses artificial core and tests the compressibility, porosity and permeability of rock through repeated rising and declining of confining pressure. The result shows that petrophysical parameters change with pressure. Different porosity may lead to the change of other parameters. There is a lag-effect in permeability change with pressure.

关 键 词：油气藏 压缩系数 孔隙度 渗透率 上覆压力 

分 类 号：TE122.2[石油与天然气工程—油气勘探]