鄂西地区牛蹄塘组和陡山沱组优质页岩测井识别  

Logging Identification of High Quality Shale of Niutitang Formation and Doushantuo Formation in Western Hubei

作　　者：刘俞佐 翟刚毅 徐笑丰 张晓明[1,2] 白卢恒 杨洋 曹沈厅 Liu Yuzuo;Zhai Gangyi;Xu Xiaofeng;Zhang Xiaoming;Bai Luheng;Yang Yang;Cao Shenting(School of Earth Resources,China University of Geosciences,Wuhan 430074,China;Key Laboratory of Tectonics and Petroleum Resources,Ministry of Education,China University of Geosciences,Wuhan 430074,China;Oil and Gas Survey Center,China Geological Survey,Beijing 100029,China)

机构地区：[1]中国地质大学资源学院,湖北武汉430074 [2]中国地质大学中国教育部构造与油气资源重点实验室,湖北武汉430074 [3]中国地质调查局油气资源调查中心,北京100029

出　　处：《地球科学》2022年第5期1791-1804,共14页Earth Science

基　　金：政府间国际科技创新合作重点专项(No.2017YFE0106300);国家自然科学基金项目(No.41672134);十三五国家科技重大专项(No.2016ZX05034-002-003)。

摘　　要：以鄂西地区为例,利用钻井、测井及测试资料,开展牛蹄塘组和陡山沱组页岩岩相类型与地质属性(总有机碳含量、孔隙度、横向渗透率、脆性及孔隙类型)关系的研究.研究结果表明:鄂西地区共发育11类岩相页岩,不同岩相页岩间存在明显的地质属性差异.结合有机质页岩特征,识别出3种优质页岩类型:硅质页岩、富泥硅质页岩和混合质页岩.优质页岩含气量明显高于非优质页岩含气量,这证实了准确的优质页岩识别结果 .通过对页岩测井影响因素的分析,总结出优质页岩具有高自然伽马、高电阻率、高声波时差、高铀、低密度、低钍、低钾(四高三低)的测井响应特征,从而提出适用于在鄂西高热演化区寻找具有低热演化程度,较强生烃潜力及易开发的页岩储层测井识别方法 .With Yichang as the research area in the paper, the relationships between lithofacies and geological property of Niutitang Formation and Doushantuo Formation shale were studied by drilling, logging and testing data(geological properties includes total organic carbon content, porosity, transverse permeability, brittleness and pore type). The study shows that there are11 types of lithological shale developed in the western Hubei, and there are obvious differences in geological properties between the different lithological shale. In combination with the characteristics of organic shale, three types of high quality shale were identified: siliceous shale, mud-rich siliceous shale, and mixed shale. The high quality shale contains significantly higher gas contents than the non-high quality shale, which confirms the accuracy of high quality shale identification results. By analyzing the influencing factors of shale logging, it is summarized that high quality shale has the logging response characteristics of high natural gamma ray, high resistivity, high acoustic time difference, high uranium, low density, low thorium and low potassium(four high values and three low values) in conventional logging curves. Thus, a logging identification method is proposed and it is suitable for finding shale reservoirs with low thermal evolution degree, strong hydrocarbon generation potential and easy development in high thermal evolution area of western Hubei.

关 键 词：页岩岩相 牛蹄塘组 陡山沱组 地质属性 测井识别 油气地质 

分 类 号：P319.3[天文地球—固体地球物理学]