涪陵页岩气田焦石坝区块五峰—龙马溪组沉积微相研究——以JYX-4井为例  

The Sedimentary Micro-Facies Study of Wufeng-Longmaxi Formation in Jiaoshiba Area, Fuling Shalegas Field——an Example from Well JYX-4

作　　者：蔡进[1] 刘莉[1] 张梦吟 吉婧[1] 孟志勇[1] CAI Jin;LIU li;ZHANG Meng-yin;JI Jing;MENG Zhi-yong(Jianghan Oilfield Company, SINOPEC, Wuhan 430223, China)

机构地区：[1]中国石化江汉油田分公司勘探开发研究院

出　　处：《河北地质大学学报》2019年第3期48-54,共7页Journal of Hebei Geo University

基　　金：国家科技重大专项“涪陵页岩气开发示范工程”(2016ZX05060);中国石化科技项目“涪陵区块复杂构造区页岩气开发评价研究”(P17014-2);中国石化江汉油田科研项目“涪陵页岩气田二期产建区综合评价研究”(JKK0216007)

摘　　要：五峰—龙马溪组属于浅海陆棚相沉积,可进一步细分为深水陆棚亚相和浅水陆棚亚相,暗色富有机质、富硅质泥页岩。沉积时期研究区主体为深水陆棚沉积环境,沉积相带大体呈北东向展布,向北西方向逐渐过渡为浅水陆棚亚相–滨岸相;利用涪陵页岩焦石坝地区重点评价井JYX-4井等测井资料、薄片鉴定、岩心观察及古生物特征,通过电性特征分析、古生物发育特征分析、矿物富集特征分析、岩石矿物组分分析等,将JYX-4井目的层沉积微相自下而上划分为:粉砂质粘土页岩微相、粉砂质粘土质混合页岩微相、粘土质粉砂质页岩微相、粘土质硅质页岩微相、灰云质泥岩微相、硅质页岩微相。The Wufeng-Longmaxi Formation belongs to shallow shelf facies deposits, and it can be further subdivided into deep water shelf subfacies and shallow continental shelf subfacies. The dark organic and siliceous mudstone shale of Wufeng-Longmaxi Formation was deposited in a deep-water shelf environment. The sedimentary facies are generally distributed in the northeast direction, and gradually change from northwest to shallow continental shelf subfacies-shore facies. Based on well logging data, thin section identification, core observation and paleontological characteristics of JYX-4, a key evaluation well in Fuling shale and Jiaoshiba area, the electrical characteristics analysis, paleontological development characteristics analysis, mineral enrichment characteristics analysis and rock mineral composition analysis are carried out. The sedimentary microfacies of JYX-4 well target layer can be divided from bottom to top into silty clay shale microfacies, silty clay mixed shale microfacies, clayey silty shale microfacies, clayey siliceous shale microfacies, limestone shale microfacies and siliceous shale microfacies.

关 键 词：涪陵页岩气田 焦石坝区块 沉积微相 五峰组 龙马溪组 

分 类 号：TE122[石油与天然气工程—油气勘探]