页岩气储层孔隙发育特征及主控因素分析:以上扬子地区龙马溪组为例  

Characteristics and controlling factors of the formation of pores of a shale gas reservoir:A case study from Longmaxi Formation of the Upper Yangtze region,China

作　　者：黄磊[1] 申维[1] 

机构地区：[1]中国地质大学(北京)地球科学与资源学院,北京100083

出　　处：《地学前缘》2015年第1期374-385,共12页Earth Science Frontiers

基　　金：国土资源部"全国油气资源战略选区调查与评价"专项(2009QYXQ15-07-05)

摘　　要：运用扫描电镜、氩离子抛光场发射电子扫描显微成像与核磁共振测试技术,对渝东南地区Y1井龙马溪组页岩的微米级孔隙、纳米级孔隙和微裂缝发育特征3个层面分别进行定量表征。结合总有机碳含量、有机质显微组分及成熟度、黏土矿物及全岩X射线衍射分析等测试数据,对孔隙发育特征主控因素进行分析。对页岩微米级孔隙发育有促进作用的因素有石英含量和伊利石含量,具有抑制作用的因素有碳酸盐含量和埋藏深度;对有机质纳米级孔隙发育有促进作用的因素有有机质成熟度和伊蒙混层含量,具有抑制作用的因素为方解石含量;对微裂缝发育有促进作用的因素有石英含量、有机质成熟度和总有机碳含量,具有抑制作用的因素是碳酸盐含量。Through the studies using SEM,Ar-ion mille FESEM and NMR technologies,the characteristics of the formation of micron-size pores,nanoscale pores and micro-fractures of the Longmaxi Formation shales were quantitatively characterized.Based on the test data of TOC,Ro,and X-ray diffraction analysis of mineral composition,the controlling factors of forming characteristics of the above three kinds of pores were analyzed.The positive factors for the development of micron-size pores are quartz content and illite content,and the negative factors are depth and carbonate content.The positive factors for the development of organic matter pores are Roand illite,smectite content,and the negative factor is calcite content.The positive factors for the development of micro-fractures are quartz content,Roand TOC,and the negative factor is calcite content.

关 键 词：页岩气 储层 孔隙 龙马溪组 主控因素 

分 类 号：P618.13[天文地球—矿床学]