张争光,徐强

• 1:中国煤炭地质总局勘查研究总院
• 2:中国矿业大学煤层气资源与成藏过程教育部重点实验室

摘要(Abstract)：

地应力贯穿于煤层气生产整个过程，对煤层气的勘探选区和工程实施具有重要的现实意义。为研究滇东地应力特征，收集了滇东地区15口井（35层煤）注入/压降试井数据。研究发现：滇东煤层埋深介于497.12～1 234.31m（平均780.44m），破裂压裂介于10.26～22.31MPa（平均16.55MPa），闭合压力介于9.75～21.44MPa（平均15.52 MPa）。煤层的破裂压力与埋深、闭合压力均表现正相关性。滇东地区垂向地应力场可划分3部分，分别是走滑断层应力场（<700m）、过渡应力场（700～1 000m）和正断层应力场（>1 000m）。滇东地区煤储层渗透率为0.004 5～1.86mD（平均0.187 9mD），随着埋深的增加，表现为“先降低后增加”的趋势，与地应力场转化位置基本一致。煤储层天然裂缝的发育规律与现代地应力场垂直分布特征，共同控制滇东地区煤储层的渗透率。

关键词(KeyWords)： 试井数据;地应力场;渗透率;破裂压力;闭合压力;滇东地区

Abstract:

Keywords:

基金项目(Foundation): 煤层气资源与成藏过程教育部重点实验室（中国矿业大学）开放基金资助项目（2022-001）

作者(Author): 张争光,徐强

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