摘要
基于8口钻井、2个剖面点的岩样观察和测试分析，滇黔北坳陷及邻区下志留统龙马溪组下段是富有机质泥页岩发育的层段，有机质演化达到过成熟阶段。X衍射全岩分析表明，龙马溪组泥页岩由黏土矿物、石英、碳酸盐、长石、黄铁矿等矿物组成，黏土矿物则以伊利石为主。泥页岩的平均脆性指数56.11%~73.21%,压裂时易于形成网络裂缝；常规物性测试，孔隙度、滲透率很f氏，扫描电镜观察，纳米级孔隙和裂缝发育。
Based on observation and test analysis of the gas-bearing shale samples from eight drilled wells and two outcrops,it is shown that the Lower Silurian lower Longmaxi shale reservoir is organic-rich and over-mature in DianqianbeiDepression and its adjacent area. The analysis of X -ray diffraction indicates that the Longmaxi shale is composed of clayminerals, quartz, calcite, feldspar, dolomite, pyrite etc., and illite is predominant in clay minerals. The average brittlenessindex of the shale is distributed from 56.11% to 73.21%, which makes it easy to form the network fractures.The test ofconventional physical properties shows that porosity and permeability are low in the shale, but the observation by ESEMshows that nanometer-scaled pores and fissures develop.
作者
舒兵
张廷山
梁兴
杨洋
谢磊
张朝
Shu Bing;Zhang Tingshan;Liang Xing;Yang Yang;Xie Lei;Zhang Zhao
出处
《海相油气地质》
CSCD
北大核心
2016年第3期22-28,共7页
Marine Origin Petroleum Geology
基金
国家自然科学基金青年基金"甲烷在页岩气储层微纳米孔隙系统中运移的动力学机理研究"(项目批准号:41302123)
博士学科点专项科研基金"页岩微观储集空间发育特征及其对页岩气赋存富集的影响机理"(项目批准号:20125121130001)
浙江油田分公司项目"南方及海相探区第四次油气资源综合评价"(编号:2013E-050210)联合资助
