秭归盆地周缘牛蹄塘组地层沉积特征及页岩气储层分析  

Niutitang Formation Sedimentary Features and Shale Gas Reservoir Analysis in Zigui Basin and Periphery

作　　者：陈葛成 吴翔 吴先文 周硕 Chen Gecheng;Wu Xiang;Wu Xianwen;Zhou Shuo(Hubei Coal Geological Exploration Institute, Wuhan, Hubei430061)

机构地区：[1]湖北煤炭地质勘查院

出　　处：《中国煤炭地质》2019年第A01期28-32,117,共6页Coal Geology of China

基　　金：湖北省自然资源厅项目(EZC-2015-ZX0303/5)

摘　　要：以单井储层地质分析为基础,结合露头资料和前人研究成果,从页岩气储层的沉积环境与分布、岩性与矿物学特征、有机地球化学特征等方面,对秭归盆地周缘牛蹄塘组储层进行了研究,具有以下几点特征:①横向非均质性仅在岩层厚度和物源丰度上存在着明显的区别;②纵向非均质性在岩性与矿物学特征、有机地球化学特征等方面均存在着明显的区别;③全井段TOC值平均3.00%,总体达到优质页岩气层标准,均为Ⅰ型(腐泥质),Ro平均值为3.10%,总体为过成熟阶段。Based on single well reservoir geological analysis, combined with outcrop information and previous studied results, from aspects of shale gas reservoir sedimentary environments and distributions, lithologic and mineralogic features, as well as organic geochemical features carried out studies on the Niutitang Formation reservoir in the Zigui Basin and periphery. Following features have been concluded that: 1) Horizontal anisotropy obvious difference has only shown on layer thickness and provenance abundance;2) Vertical anisotropy obvious difference has shown on all lithologic and mineralogic features, as well as organic geochemical features;3) Whole well TOC average value 3.00%. Overall achieved to high quality shale gas reservoir standard, belongs category I (sapropelic type), average R o 3.10%, in overmature stage as a whole.

关 键 词：沉积特征 页岩气储层 牛蹄塘组 秭归盆地周缘 

分 类 号：P641.461[天文地球—地质矿产勘探]