摘要
为了研究古交矿区B4区块的地应力特征及其控气作用,通过现场水力压裂数据测定煤层应力,并分析地应力与煤层气气藏及产能的相关性。得到2点结论:①研究区的西南向东北延伸,水平最大主应力由NEE向的挤压应力转变为NNW向的拉张应力;研究区南部区域内,水平应力大小由西向东减小。②水平地应力越大,孔隙发育被抑制,从而抑制煤层气富集和煤层气的高产;垂向主应力在褶皱区为抑制煤层气富集,在断裂带则抑制煤层气逸散。
In order to study the characteristics of in-situ stress and its gas control effect in block B4 of Gujiao mining area,the in-situ hydraulic fracturing data is used to determine the coal seam stress,and the correlation between in-situ stress and coalbed methane reservoir and production capacity is analyzed.The conclusions:①the study area extends from southwest to northeast,and the maximum horizontal principal stress changes from nee to compressive stress to NNW tensile stress;in the south of the study area,the horizontal stress decreases from west to East.②The horizontal in-situ stress restrains the enrichment of coalbed methane and the high production of coalbed methane;the vertical principal stress restrains the enrichment of coalbed methane in the fold area and the escape of coalbed methane in the fault zone.
作者
王晋
WANG Jin(Gas Geology Research and Application Center of Yangmei Group,Yangquan 045000,China)
出处
《煤炭技术》
CAS
2020年第11期56-59,共4页
Coal Technology
关键词
地应力
气藏
产能
相关性
in-situ stress
gas reservoir
capacity of production
correlation
