阳信洼陷沙一段生物成因页岩气成藏条件  

Biogenic shale gas accumulation conditions in the Es_1 of Yangxin sag

作　　者：高阳[1] 

机构地区：[1]中石化胜利油田分公司,山东东营257015

出　　处：《特种油气藏》2013年第5期46-50,153,共5页Special Oil & Gas Reservoirs

基　　金：国家自然基金"生物气形成的母质来源研究:活性有机质保存条件"(NSF40873031);中国石油天然气集团公司项目"生物气和低熟气的形成机理;成藏富集规律及资源潜力评价"(2008A-0608)

摘　　要：从天然气特征、生烃条件、储集条件、地层水介质条件等方面对阳信洼陷沙一段生物页岩气的成藏条件进行了分析,对比了Michigan盆地Antrim和阳信洼陷沙一段生物页岩气成藏条件。研究认为,阳信洼陷沙一段油页岩TOC平均为8.2%,沉积环境为微咸水—还原环境,有利于产甲烷菌繁殖,且页岩始终处于微生物作用阶段,生烃条件优越。通过该研究有助于查清生物成因页岩气成藏所需的地质条件,并对寻找该类页岩气具有一定意义。The conditions of biogenic shale gas accumulation in the Es 1 of Yangxin sag are analyzed in respects of gas property, source rock conditions,reservoir conditions and formation water conditions,and compared with the Antrim shale gas in Michigan. The study found that for Es 1 oil shale the average TOC is 8. 2%,the depositional environment was brackish water-reducing environment,which was conducive to produce methanogen bacteria; moreover the shale had been all along under microbial action,and the hydrocarbon generation conditions were superior. This research is helpful to understand necessary geological conditions of forming biogenic shale gas accumulation,and is of certain significance to seeking for such type of shale gas.

关 键 词：页岩气 成藏条件 生物气 沙河街组 阳信洼陷 

分 类 号：TE122.3[石油与天然气工程—油气勘探]