延川南山西组煤岩微相特征及其对煤层气开发的指导意义  

Coal rock microfacies characteristics and its guiding significance for coalbed methane development in Shanxi group of South Yanchuan area

作　　者：梅俊伟[1] 王运海[1] 杨媛媛[1] 

机构地区：[1]中国石化华东分公司石油勘探开发研究院,江苏南京210011

出　　处：《油气藏评价与开发》2015年第4期77-82,共6页Petroleum Reservoir Evaluation and Development

摘　　要：延川南山西组含煤岩系发育于三角洲平原亚相,其煤相类型主要为潮湿森林沼泽相,是延川南煤层气田的主要产气层段。以岩心、测井资料、煤岩分析数据为基础,依据成煤物质的形成条件及保存环境,将煤相进一步细分为高位森林泥炭沼泽、中位森林泥炭沼泽及低位森林泥炭沼泽三种微相类型;并在此基础上,探讨煤岩微相与煤层厚度、夹矸厚度、煤岩含气量、煤岩物性及围岩封存性能的关系,揭示煤层气的高产富集规律。研究结果表明中位森林泥炭沼泽微相区最有利于煤层气开发,其次为低位森林泥炭沼泽微相区。Coal bearing formation in Shanxi group of South Yanchuan area develops in delta plain facies. Being mesohylile paludal facies, its coal facies types is the main gas productive reservoir of coalbed methane （CBM）. Based on core, well logging data, coal rock analysis data, and according to formation conditions and preserving environment of coal forming material, coal facies was fur？ther subdivided into three types of microfacies types such as high forest peat swamp, middle forest peat swamp, and low forest peat swamp. On this basis, through discussing relationship among coal microfacies and coal bed thickness, stone band thickness, meth？ane content, coal physical properties, storage performance, the enrichment law was revealed. The researches show that middle for？est peat swamp microfacies is the most beneficial to CBM development, followed by low forest peat swamp.

关 键 词：延川南 山西组 煤岩微相 煤层气 

分 类 号：TE122[石油与天然气工程—油气勘探]