2016年2期

湖北省上奥陶统五峰组—下志留统龙马溪组页岩气地质条件分析及有利区带预测

发布时间:2016-09-05阅读次数:

【期数】2016-2

【作者】刘 安1,包汉勇2,李 海1,危 凯1,李继涛1,曾雄伟1

【机构】1.中国地质调查局武汉地质调查中心,湖北武汉,4302052; 2.中国石化江汉油田勘探开发研究院,湖北武汉,430223

【关键词】湖北省;五峰组;龙马溪组;页岩气

【中文摘要】本文在调查和总结湖北省页岩气地质调查成果资料基础上,分析了湖北省上奥陶统五峰组-下志留统龙马溪组页岩气地质条件。湖北省O3w-S1l富有机质页岩分布和TOC主要受到古隆起的控制,富有机质页岩在古隆起边缘或古隆起之间的坳陷区发育,其中鄂西水下古隆起西部、黄陵隆起东北部、神农架古隆起北部富有机质页岩厚度多大于40 m,TOC大于2 %,页岩成熟度一般为2% ~ 3%。O3w-S1l富有机质页岩孔隙度多小于5 %,石英矿物含量较高。页岩含气性受保存条件的影响较大,湖北地区页岩气保存条件相对较差,局部构造稳定地区含气性较好。综合分析利川复向斜、秭归盆地西部、当阳复向斜为页岩气勘探的有利区带。

【英文摘要】we analysis the geological conditions of shale gas at the bottom of the Upper Ordovician Wufeng formation- Lower Silurian Longmaxi formation in Hubei province, based on field geology investigation and previous studies of shale gas in Hubei province. The distribution of black shale of O3w-S1l and its TOC were controlled by paleohigh; The black shales were thicker between the paleohighes or on the margin of paleohighes, The balck shales thickess is more than 40m in West of Hubei submarine high, Northeast of Huangling paleohigh, North of Shennongjia paleohigh, and with TOC more than 2%, Ro between 2% to 3%. The porosity is less than 5%, with high content of brittle minerals such quartz. The gas content is controlled by preservation condition, and most area of Hubei province with bad preservation condition, structure stable area is better in gas content. Lichuan synclinorium, west of Zigui basin, Dangyang synclinorium are the favorable area zones in Hubei province.

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