Controlling factors of marine shale gas differential enrichment in southern China

作     者：JIANG Zhenxue SONG Yan TANG Xianglu LI Zhuo WANG Xingmeng WANG Guozhen XUE Zixin LI Xin ZHANG Kun CHANG Jiaqi QIU Hengyuan JIANG Zhenxue;SONG Yan;TANG Xianglu;LI Zhuo;WANG Xingmeng;WANG Guozhen;XUE Zixin;LI Xin;ZHANG Kun;CHANG Jiaqi;QIU Hengyuan

作者机构：State Key Laboratory of Petroleum Resource and ProspectingChina University of Petroleum(Beijing)Beijing 102249China Unconventional Oil and Gas Science and Technology Research InstituteChina University of Petroleum(Beijing)Beijing 102249China School of Geoscience and TechnologySouthwest Petroleum UniversityChengdu 610500China 

出 版 物：《Petroleum Exploration and Development》 (石油勘探与开发（英文版）)

年 卷 期：2020年第47卷第3期

页      面：661-673页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 0808[工学-电气工程] 08[工学] 0820[工学-石油与天然气工程] 0818[工学-地质资源与地质工程] 0708[理学-地球物理学] 0807[工学-动力工程及工程热物理] 0815[工学-水利工程] 0816[工学-测绘科学与技术] 0813[工学-建筑学] 0814[工学-土木工程] 082002[工学-油气田开发工程] 

基　　金：Supported by the China National Science and Technology Major Project(2017ZX05035002) the National Natural Science Foundation of China(41872135,41802153) 

主　　题：southern China shale gas differential enrichment main controlling factors factors matching accumulation effect 

摘      要：Based on the exploration and development practice of marine shale gas in Fuling, Weiyuan, Changning, Luzhou and Southeast Chongqing in southern China, combined with experiments and analysis, six factors controlling differential enrichment of marine shale gas are summarized as follows:(1) The more appropriate thermal evolution and the higher the abundance of organic matter, the higher the adsorption and total gas content of shale will be.(2) Kerogen pyrolysis and liquid hydrocarbon cracking provide most of the marine shale gas.(3) The specific surface area and pore volume of organic matter rich shale increased first and then decreased with the increase of thermal evolution degree of organic shale. At Ro between 2.23% and 3.33%, the shale reservoirs are mainly oil-wet, which is conducive to the enrichment of shale gas.(4) The thicker the roof and floor, the higher the shale gas content. The longer the last tectonic uplift time and the greater the uplift amplitude, the greater the loss of shale gas will be.(5) The buried depth and dip angle of the stratum have different controlling and coupling effects on shale gas in different tectonic positions, resulting in two differential enrichment models of shale gas.(6) The effective and comprehensive matching of source, reservoir and preservation conditions determines the quality of shale gas accumulation. Good match of effective gas generating amount and time, moderate pore evolution and good preservation conditions in space and time is essential for the enrichment of shale gas.