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
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.
發文機構：State Key Laboratory of Petroleum Resource and Prospecting Unconventional Oil and Gas Science and Technology Research Institute School of Geoscience and Technology
關鍵詞：southernChinashalegasdifferentialenrichmentmaincontrollingfactorsfactorsmatchingaccumulationeffect
分類號： TE37[石油與天然氣工程—油氣田開發工程]
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