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。
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 affected by tectonic movement, leading to growth of pore volume, it tends to appear abnormal low pressure herein.
出处
《新疆石油地质》
CAS
CSCD
2004年第4期443-445,共3页
Xinjiang Petroleum Geology
关键词
地层压力
静水压力
压力异常
油气藏
oil-gas reservoir
pressure factor
abnormal-pressure
formation pressure
