贵州凤冈地区页岩气储层裂缝发育研究  

Research on farctures of shale gas reservoir in the Fenggang area of Guizhou

作　　者：鹿重阳 左宇军[1,2,3,4] 李希建[1,2,3,4] 邬忠虎[1,2,3,4] 许云飞[1,2,3,4] 

机构地区：[1]贵州大学矿业学院,贵阳550025 [2]贵州省非金属矿产资源综合利用重点实验室,贵阳550025 [3]贵州省优势矿产资源高效利用工程实验室,贵阳550025 [4]复杂地质矿山开采安全技术工程中心,贵阳550025

出　　处：《中国科技论文》2016年第3期307-310,共4页China Sciencepaper

基　　金：贵州省重大应用基础研究资助项目(黔科合JZ字[2014]2005)

摘　　要：为了查明贵州凤冈地区页岩气储层裂缝发育特征以及主控因素,本文采用成像测井分析方法,对凤参1井及邻井的下寒武统牛蹄塘组页岩裂缝特征以及主控因素进行研究。结果表明,该区域断裂发育复杂,由多个断裂体系相互交错、切割形成,褶皱形体以隔槽式为主的;牛蹄塘组页岩层岩心裂缝特征以构造裂缝为主,横裂缝、垂直裂缝占主体;部分岩心破碎严重,并且裂缝大部分被其他矿物成分充填;页岩中的脆性矿物所占比例高,以长石与石英为主。这种容易发生脆性破裂的储层易于形成天然裂缝,更有利于页岩气的压裂开采。In order to find out the main controlling factors for the development of shale gas reservoirs in the Fenggang area of Guizhou,fractural characteristics and controlling factors of shalesin the Cambrian Niutitang Formation were studiedbyuse of imaging logging analysis method.Results shows that:complexfractural systems developed in the area.Intense tectonic movement led to multiple fracturalsystems with mutual crisscross and cutting,and folds dominated by widely spaced synclines.Fracturesof drill coresare mostly tectonic in origin and mainly composed of horizontal and vertical cracks.Some cores are broken seriouslyand cracks are filled mineral deposits.Brittle minerals,mostlyfeldspar and quartz,account for a largeproportion in shales.Natural fractures are readily produced in brittle shales,whicheffectively improve the production of shale gas.

关 键 词：页岩气 储层裂缝 裂缝发育 下寒武统 脆性矿物 贵州 

分 类 号：P618.13[天文地球—矿床学]