摘要
现今地应力场特征研究对煤层气开发有重大影响。采用水力压裂测量地应力的方法,对沁水盆地南部樊庄区块3#煤层地应力分布进行了测试。结果表明:樊庄区块最大水平主应力为6.42~41.86 MPa,最小水平主应力为3.30~26.40 MPa,垂直应力为9.14~30.64 MPa。煤储层现今地应力随深度的增加呈线性增大规律。现今地应力作用方向主要以NEE-SWW方向为特征。基于最小水平主应力值和煤层埋藏深度以及应力状态,樊庄区块煤储层可划分为低应力分布区和中应力分布区。
The research on the characteristics of present in-situ stress field has a great influence on the development of coalbed methane.The in-situ stress distribution of No.3 coal seam in Fanzhuang block in the south of Qinshui basin is measured by hydraulic fracturing.The results show that the maximum horizontal principal stress is 6.42 MPa to 41.86 MPa,the minimum horizontal principal stress is 3.30 MPa to 26.40 MPa,and the vertical stress is 9.14 MPa to 30.64 MPa.The present in-situ stress of coal reservoir increases linearly with the increase of depth.The direction of present in-situ stress action is mainly NEE-SWW.Based on the minimum horizontal principal stress value,the buried depth and stress state of coal seam,the block coal reservoir in Fanzhuang area can be divided into low stress distribution area and medium stress distribution area.
作者
张宇
高超迪
ZHANG Yu;GAO Chao-di(School of Ocean Sciences,China University of Geosciences(Beijing),Beijing 100083,China)
出处
《煤炭技术》
CAS
北大核心
2021年第3期52-53,共2页
Coal Technology
基金
中国地质大学(北京)大学生创新创业训练计划项目(202011415087)。
关键词
现今地应力
水压致裂
沁水盆地
樊庄区块
present in-situ stress
hydraulic fracturing
Qinshui basin
Fanzhuang block