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Relationship Between Electrical Properties and Sedimentary Environment of the Longmaxi Formation Shale, Southern Sichuan
Yang Kai1; Zhang Bing1,2; Wang Xuben1,2; He Lanfang3; Yang Hongyu1; Wang Pengwan4; Tang Jialin1; Deng Jixin1; Zhang Cong5
2020-10-01
Source PublicationACTA GEOLOGICA SINICA-ENGLISH EDITION
ISSN1000-9515
Volume94Issue:5Pages:1531-1546
AbstractThe Lower Silurian Longmaxi Formation in the south of Sichuan is a key player in the exploration and development of shale gas in China. Due to a highly complex topographic area, electromagnetic methods (EM) become important exploration means in this area. Many 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 understood. The 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 measurements. The discovered high quartz content of the Longmaxi Formation shale results in low resistivity. Deep-water shelf biogenic quartz contributes lower resistivity more than that of shallow-water terrigenous quartz. The deep-water anoxic and organic sedimentary environment led to major enrichment of pyrite, leading to a high polarization effect in shale. We present the correlation between the lithofacies types and electrical properties of Longmaxi Formation. The 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 prospecting. Our study can provide constraints on electrical parameters of rocks for electromagnetic "sweet spot" exploration of shale gas, and so this has important geological significance to shale gas exploration and development.
Keywordshale gas exploration quartz total organic carbon lithofacies electromagnetic method Sichuan basin
DOI10.1111/1755-6724.14401
Funding OrganizationNational Natural Science Foundation ; National Natural Science Foundation ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey ; National Natural Science Foundation ; National Natural Science Foundation ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey ; National Natural Science Foundation ; National Natural Science Foundation ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey ; National Natural Science Foundation ; National Natural Science Foundation ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey
WOS KeywordORGANIC-MATTER ACCUMULATION ; GAS ACCUMULATION ; DEPOSITIONAL ENVIRONMENT ; CHINA IMPLICATIONS ; RICH SHALES ; EXPLORATION ; BASIN ; WUFENG ; QUARTZ ; ROCK
Language英语
Funding ProjectNational Natural Science Foundation[41502111] ; National Natural Science Foundation[91755215] ; National Natural Science Foundation[U1262206] ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey[DD20160170]
Funding OrganizationNational Natural Science Foundation ; National Natural Science Foundation ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey ; National Natural Science Foundation ; National Natural Science Foundation ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey ; National Natural Science Foundation ; National Natural Science Foundation ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey ; National Natural Science Foundation ; National Natural Science Foundation ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey ; Unconventional Oil and Gas Geology Key Laboratory of China Geological Survey
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000585902600015
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/98698
Collection岩石圈演化国家重点实验室
Corresponding AuthorZhang Bing
Affiliation1.Chengdu Univ Technol, Earth Explorat & Informat Technol Key Lab, Minist Educ, Chengdu 610059, Peoples R China
2.Chengdu Univ Technol, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610059, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
4.PetroChina Hangzhou Inst Petr Geol, Hangzhou 310023, Peoples R China
5.China Geol Survey, Key Lab Unconvent Petr Geol, Beijing 100083, Peoples R China
Recommended Citation
GB/T 7714
Yang Kai,Zhang Bing,Wang Xuben,et al. Relationship Between Electrical Properties and Sedimentary Environment of the Longmaxi Formation Shale, Southern Sichuan[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2020,94(5):1531-1546.
APA Yang Kai.,Zhang Bing.,Wang Xuben.,He Lanfang.,Yang Hongyu.,...&Zhang Cong.(2020).Relationship Between Electrical Properties and Sedimentary Environment of the Longmaxi Formation Shale, Southern Sichuan.ACTA GEOLOGICA SINICA-ENGLISH EDITION,94(5),1531-1546.
MLA Yang Kai,et al."Relationship Between Electrical Properties and Sedimentary Environment of the Longmaxi Formation Shale, Southern Sichuan".ACTA GEOLOGICA SINICA-ENGLISH EDITION 94.5(2020):1531-1546.
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