涟源凹陷下石炭统测水组页岩有利层段优选  

Favorable Shale Gas Layer Optimization of Ceshui Formation in Lianyuan Depression

作　　者：刘力 唐书恒[1] 郗兆栋 LIU Li;TANG Shu-heng;XI Zhao-dong(School of Energy Resources,China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]中国地质大学(北京)能源学院,北京100083

出　　处：《科学技术与工程》2018年第30期50-57,共8页Science Technology and Engineering

基　　金：国家科技重大专项(2017ZX05035)资助

摘　　要：基于钻井资料及相关实验测试结果,对涟源凹陷测水组海陆过渡相页岩储层特征进行了深入研究,建立了研究区海陆过渡相页岩气有利层段评价标准,并据此优选了测水组的页岩气有利层段。结果表明:研究区测水组主要发育两个富有机质页岩层段,各层段厚度均超过25 m,总有机碳含量平均达到1. 84%,干酪根类型为Ⅲ型,镜质组反射率为2. 05%～3. 62%,达到过成熟阶段;页岩中脆性矿物含量高,微裂缝发育; 7个页岩样品平均含气量为0. 31 m^3/t,总体保存条件良好,显示出研究区测水组海陆过渡相页岩具有较好的勘探开发前景。根据建立的评价标准,优选出层段二为测水组页岩气的有利层段。The characteristics of marine-continental transitional shale gas reservoir of Ceshui Formation in Lianyuan Depression were studied on the basis of drilling data and related experimental results.Evaluation criteria for marine-continental transitional shale gas favorable layers in research zone were established,and the favorable shale gas layer was selected.The results show as follows.In the research zone,there are two main organic-rich shale gas layers and their thicknesses are over 25 m.The average content of total organic carbon of Ceshui Formation is 1.84%,the kerogen type is III type,the R o values are between 2.05%~3.62%and the average is 2.62%,which indicates the shale is in the post mature stage.Shale had high contents of brittle minerals and the micro fractures are developed.The average gas content of seven shale samples is 0.31 m 3/t.The overall preserving conditions of shale gas are relatively good,which illustrates a good exploration and development prospect of Ceshui Formation marine-continental transitional shale in the research zone.The results turn out that the layer II was favorable shale gas layer of Ceshui Formation in the research zone.

关 键 词：涟源凹陷 测水组 页岩气储层 有利层段 海陆过渡相页岩 

分 类 号：TE132[石油与天然气工程—油气勘探]