Relationship Between Electrical Properties and Sedimentary Environment of the Longmaxi Formation Shale,Southern Sichuan

作     者：YANG Kai ZHANG Bing WANG Xuben HE Lanfang YANG Hongyu WANG Pengwan TANG Jialin DENG Jixin ZHANG Cong YANG Kai;ZHANG Bing;WANG Xuben;HE Lanfang;YANG Hongyu;WANG Pengwan;TANG Jialin;DENG Jixin;ZHANG Cong

作者机构：Earth Exploration and Information Technology Key Laboratory of Ministry of EducationChengdu University of TechnologyChengdu 610059China State Key Laboratory of Oil and Gas Reservoir Geology and ExploitationChengdu University of TechnologyChengdu 610059China Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China PetroChina Hangzhou Institute of Petroleum GeologyHangzhou 310023China China Geological Surveythe Key Laboratory of Unconventional Petroleum GeologyBeijing 100083China 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报（英文版）)

年 卷 期：2020年第94卷第5期

页      面：1531-1546页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：financially supported by the National Natural Science Foundation(Grant No.41502111,Grant No.91755215 and Grant No.U1262206) the Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey(DD20160170) 

主　　题：shale gas exploration quartz total organic carbon lithofacies electromagnetic method Sichuan basin 

摘      要：The Lower Silurian Longmaxi Formation in the south of Sichuan is a key player in the exploration and development of shale gas in *** to a highly complex topographic area,electromagnetic methods(EM)become important exploration means in this *** studies have been conducted on the shale mineral composition and electrical properties of shale,however,the correlation between sedimentary environments and the electrical properties of shale remain poorly *** electrical properties and sedimentary environment of the organic-rich shale of the Longmaxi Formation have been studied by means of X-ray diffraction,organic geochemistry,scanning electron microscopy and complex resistivity *** discovered high quartz content of the Longmaxi Formation shale results in low ***-water shelf biogenic quartz contributes lower resistivity more than that of shallow-water terrigenous *** deep-water anoxic and organic sedimentary environment led to major enrichment of pyrite,leading to a high polarization effect in *** present the correlation between the lithofacies types and electrical properties of Longmaxi *** mixed siliceous shale lithofacies is the most favorable among the three lithofacies,which is characterized by high total organic carbon(TOC)content,high brittleness mineral content,high polarization and low resistivity(three high and one low).This feature is an effective identification of shale gas reservoirs by electromagnetic *** study can provide constraints on electrical parameters of rocks for electromagneticsweet spotexploration of shale gas,and so this has important geological significance to shale gas exploration and development.