成庄井田3号煤层气成藏条件分析  

Analysis of Reservoir Conditions for the No.3 Coalbed Methanein Chengzhuang Minefield

作　　者：刘昊承 LIU Hao-cheng(Shanxi Lanyan CBM Group Co.,Ltd.,Jincheng 048006,China)

机构地区：[1]山西蓝焰煤层气集团有限责任公司,山西晋城048006

出　　处：《煤》2020年第10期15-19,共5页Coal

基　　金：国家科技重大专项资助项目(2016ZX05067)。

摘　　要：煤层气藏具有自身的成藏特征和形成条件,是煤层气勘探开发的重要研究内容之一。文章从煤层生烃、煤层气储集和盖层封闭保存条件三方面对成庄井田3号煤层气成藏条件进行了分析。结果表明:成庄井田3号煤层气具有良好的“生”、“储”、“盖”成藏条件。煤化过程中,大量有机显微组分和热变质作用为煤层气成藏提供了良好生烃条件,是煤层气成藏的基础;煤中大量微观孔隙发育,为煤层气吸附储集提供了大量空间,吸附能增强,吸附煤层气量增大,为煤层气成藏提供了保障;适宜的埋深、一定厚度泥质类围岩、构造封闭性好、地下水弱径流和滞留状态为煤层气起到了良好的封盖保存条件,是煤层气成藏的根本。Coalbed methane reservoirs have their own accumulation characteristics and conditions,which is one of the important research contents of CBM exploration and development.The coalbed methane accumulation conditions of the No.3 coal seam in Chengzhuang Mine Field were analyzed from the aspects of coalbed hydrocarbon generation,coalbed methane storage and capping seal preservation conditions.The results show that:the No.3 coal bed methane in Chengzhuang Minefield has good conditions for“generation”,“storage”and“cap”accumulation.During the coalification process,a large number of organic micro components and thermal metamorphism provide good hydrocarbon generation conditions for coalbed methane accumulation,which is the basis of coalbed methane accumulation.The development of a large number of microscopic pores in coal provides a large amount of space for CBM adsorption and storage.The adsorption energy is enhanced and the amount of adsorbed CBM is increased,which provides guarantee for the formation of CBM reservoirs.Proper burial depth,a certain thickness of muddy surrounding rock,good structural sealing,weak groundwater runoff and retention state provide good sealing and preservation conditions for CBM,which is the foundation of CBM accumulation.

关 键 词：成庄井田 3号煤层 煤层气 成藏条件 

分 类 号：P618.13[天文地球—矿床学]