新疆石油地质 ›› 2006, Vol. 27 ›› Issue (2): 191-193.

• 油藏工程 • 上一篇    下一篇

注采过程中岩石压缩系数、孔隙度及渗透率的变化规律

汪周华1, 郭平1, 周道勇1, 高慧君2   

  1. 1.西南石油学院油气藏地质及开发工程国家重点实验室, 成都 610500;
    2.中国石油华北油气田分公司, 河北廊坊 065000
  • 收稿日期:2005-06-07 修回日期:2005-06-07 出版日期:2006-04-01 发布日期:2020-10-30
  • 作者简介:汪周华(1979-) , 男, 湖北宜昌人, 在读博士研究生, 气田开发,(Tel) 028-83033199(E-mail) wangzhouhua@126.com.

Variation Laws of Compressibility, Porosity and Permeability of Rocks during Injection-Production Process of Reservoir

WANG Zhou-hua1, GUO Ping1, ZHOU Dao-yong1, GAO Hui-jun2   

  1. 1. State Key Laboratory of Oil-Gas Reservoir Geology and Exploitation, Southwest Petroleum Institute, Chengdu, Sichuan 610500, China;
    2. Huabei Oilfield Company, Petro China, Langfang, Hebei 065000, China
  • Received:2005-06-07 Revised:2005-06-07 Online:2006-04-01 Published:2020-10-30

摘要: 目前我国许多油气藏进行了保压开采措施及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、渗透率发生着不断的变化。对于岩石物性参数随压力下降的变化规律已有统一认识, 但对于地层压力循环升降过程中岩石物性参数的变化规律研究还较少。研究过程中采用实际人造岩心, 从实验角度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, 其他参数变化规律不同; 渗透率随压力循环升降存在滞后效应。

关键词: 油气藏, 压缩系数, 孔隙度, 渗透率, 上覆岩层压力

Abstract: The keep-up pressure recovery of most oil-gas reservoirs and the gas storage measurement on some depletion reservoirs have been made in China, which have endlessly caused variation of pressure difference between inside-pore and outside-pore, followed by always changes of compressibility, porosity and permeability of rocks due to injection and production time and again of reservoir fluids. The variation of petrophysical parameters with pressure drawdown is better known, but the changing law of them with cycling, rising and declining of formation pressure is seldom researched. This paper presents the experiment of compressibility, porosity and permeability by using artificial cores on which different confining pressures are put. Study shows that these petrophysical parameters will change with pressures, of which rock porosity will affect other parameters' variations, and permeability has lag-effect during cycling, rising and declining of the pressure.

Key words: reservoir, compressibility, porosity, permeability, overburden pressure

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