渝东北南大巴山前陆褶皱冲断带下古生界页岩含气量影响因素分析  

Influencing factors analysis of lower palaeozoic shale gas content in foreland fold thrust belts of south Dabashan,northeastern Chongqing

作　　者：陈朝刚 

机构地区：[1]重庆地质矿产研究院,重庆400043 [2]重庆页岩气勘探开发有限责任公司

出　　处：《石油地质与工程》2016年第4期18-22,146,共5页Petroleum Geology and Engineering

基　　金：重庆市科委前沿与应用基础研究项目"页岩气藏体积压裂水平井非线性渗流理论及流-固耦合综合模型研究"(编号:cstc2015jcyjA90014);重庆市教委科学技术研究项目"页岩气藏体积压裂水平井流-固耦合流动规律及数值试井方法研究"(编号:KJ1501315);中国石油科技创新基金研究项目"基于裂缝变形机理的页岩气藏体积压裂水平井流体流动规律研究"(编号:2015D-5006-0207)

摘　　要：页岩含气量是页岩气资源潜力评价和选区的关键指标。以渝东北南大巴山前陆褶皱冲断带下古生界页岩气储层为研究对象,以岩心等温吸附实验为基础,对该地区下寒武统水井沱组和上奥陶统五峰组-下志留统龙马溪组两套页岩储层含气量及其影响因素进行了探讨。研究表明:有机碳含量、总烃含量、石英矿物含量、地层压力是页岩含气量的主控因素,与吸附气含量具有很好的正相关性;孔喉半径和比表面积与页岩吸附气含量具有一定的正相关性。Shale gas content is a key indicator of shale gas resources potential evaluation and area selection.By taking shale gas reservoirs from lower Paleozoic strata of foreland fold- thrust belts of south Dabashan in northeastern Chongqing as the research target,based on the isothermal adsorption experiment of the cores,the influencing factors analysis of lower palaeozoic shale gas content from Shuijingtuo formation in lower Cambrian and from Wufeng formation in upper Ordovician- Maxi formation in lower Silurian has been carried out.The research results indicate the organic carbon content,total hydrocarbon content,quartz content,and formation pressure are the main controlling factors of shale gas content,and it has a good positive correlation with adsorbed gas content.There is also a certain positive correlation between pore throat radius,specific surface area and adsorbed gas content.

关 键 词：南大巴山 页岩含气量 有机碳含量 等温吸附 吸附气 

分 类 号：TE112[石油与天然气工程—油气勘探]