新疆石油地质 ›› 2004, Vol. 25 ›› Issue (4): 443-445.

• 讨论与争鸣 • 上一篇    下一篇

地层异常压力原因分析

李传亮   

  1. 西南石油学院石油工程系,四川成都610500
  • 发布日期:2021-01-06
  • 作者简介:李传亮(1962-),男,山东嘉祥人、教授,博士,油藏工程,联系电话:0817-2643291

Analysis of A bnormal Reservoir Pressure

LI Chuan-liang   

  1. Southwest Petroleum Institute, Chengdu, Sichuan 610500, China
  • Published:2021-01-06

摘要: 根据地层压力 与静水压力的比值大小,可将地层压力分为异常高压、异常低压和正常压力三种压力状态。根据油藏工程理论,分析了各种压力状态出现的原因。指出,非封闭地层的压力通常都属于正常压力状态,封闭地层若有外来流体进入,则可能出现异常高压现象,封闭地层若被构造运动破碎致使孔隙体积增加,则可能出现异常低压现象。

关键词: 油气藏, 压力系数, 压力异常, 地层压力

Abstract: Reservoir pressure can be divided into normal pressure, abnormal high pressure and abnormal low pressure in terms of the ratio between formation pressure and hydrostatic pressure. These pressure phenomena are analyzed in this paper. Study shows that the pressure in non-confining beds normally belongs to the range of normal pressure; confining zones with invasion of external fluids could give rise to abnormal high pressure; provided that induced fractures occur in confining zones where are affeted by tectonic movement, leading to growth of pore volume, it tends to appear abnormal low pressure herein.

Key words: oil-gas reservoir, pressure factor, abnormal pressure, formation pressure

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