构造模式与煤层气井产能的关系——以晋城煤区为例

Relationship between structural style and CBM well productivity:A case study of the Jincheng coalfield

随着山西省晋城煤层气区煤层气商业化开发规模的不断扩大,煤层气井积累的数据越来越丰富,为研究不同构造模式下煤层气井的产能提供了充足的数据支持。为了分析各种构造模式对煤层气井作业的影响及其与产能的关系,将该区构造模式大致分为断层构造、褶皱构造和陷落柱构造3类,结合煤层气井的生产数据和地质资料,对不同构造模式下煤层气井的产能情况进行了总结;最后,分析了煤层气水平井与小构造的关系,提出了水平井布井的基本原则,即水平井排采井筒应位于构造低部位。

Along with the enlargement of scale of commercial CBM development in the Jincheng coalfield,Shanxi,rich CBM well data have been accumulated,making it possible to study the relationship between structural style and CBM well productivity.Aiming at revealing the influences of various structural styles on CBM well performance and productivity,three structural styles including fault,fold and collapsed prism are identified in the study area,and the productivity of CBM wells in the areas with different structural styles are analyzed in combination with both production and geologic data.Finally,the relationship between horizontal CBM wells and small structures is also discussed.It is proposed that horizontal wells should be placed at the downstructure locations.