地质科技情报2017，Vol.36Issue(2)：65-74,10.DOI:10.19509/j.cnki.dzkq.2017.0208
川西南威远地区龙马溪组页岩储层孔隙发育特征及控制因素分析
Pore Characteristics of Shale Gas Reservoir of Longmaxi Formation in Weiyuan Area, Southwest of Sichuan Basin
摘要
Abstract
Taking the shale of Longmaxi Formation in the southwest of Sichuan Basin,this paper discusses the pore types and pore structures by XRD,the experimental methods of multivariate regression analysis and scanning electron microscopy,the analytical method of QSDFT.The results prove the followings.(1) There are three pore types:organic matter pore,inorganic pore and fracture;the organic matter pore distribution pattern contains discontinuous distribution that can form good pore network and isolated or massive distribution that cannot form good network.The pores are mainly divided into 2 structure types:slit type pores with parallel plates and ink bottle type pore.(2)The pore diameter is generally less than 20 nm,meaning micropores and mesopores are the main reservoir pores in the study area,which have 0-2 nm,and 2-4 nm peak distributions.The main pore volume and specific surface area decreasing with the depth of burial is mainly provided by micropores and mesopores.(3) Organic matter,quartz and claymineralogy control the pore growth of the shale reservoir.More specifically,organic matter and quartz control the micropore growth,while clay mineralogy controls the mesopore growth.In addition,thermal evolution of the organic matte of the overmature shale may lowerthe pore growth.(4)In considering the shale reservoir in the area of Jiaoshiba,the organic matter content is the main controlling factor of the pore development.关键词
龙马溪组/孔隙类型/孔隙结构特征/控制因素Key words
Longmaxi Formation/pore type/pore structure characteristics/controlling factor分类
地质学引用本文复制引用
昝博文,刘树根,白志强,冉波,叶玥豪,邱嘉文..川西南威远地区龙马溪组页岩储层孔隙发育特征及控制因素分析[J].地质科技情报,2017,36(2):65-74,10.基金项目
国家重点基础研究发展计划(973)课题“中上扬子地区构造演化与下古生界油气多期成藏”(2012CB214805) （973）
四川省科技计划项目“强改造作用下川南地区下古生界页岩气保存条件研究"(2015SZ0001) （2015SZ0001）
