Impact of volcanism on the formation and hydrocarbon generation of organic-rich shale in the Jiyang Depression, Bohai Bay Basin, China

作     者：Jia-Hong Gao Xin-Ping Liang Zhi-Jun Jin Quan-You Liu Chang-Rong Li Xiao-Wei Huang Ju-Ye Shi Peng Li Jia-Hong Gao;Xin-Ping Liang;Zhi-Jun Jin;Quan-You Liu;Chang-Rong Li;Xiao-Wei Huang;Ju-Ye Shi;Peng Li

作者机构：State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient DevelopmentInstitute of EnergyPeking University Petroleum Exploration and Production Research InstituteSINOPECBeijing100871 China School of Energy ResourcesChina University of Geosciences Beijing100083 China 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2024年第21卷第3期

页      面：1539-1551页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0710[理学-生物学] 0709[理学-地质学] 070207[理学-光学] 0707[理学-海洋科学] 0817[工学-化学工程与技术] 08[工学] 0708[理学-地球物理学] 0703[理学-化学] 082002[工学-油气田开发工程] 0702[理学-物理学] 

基　　金：the financial support from the National Natural Science Foundation of China(42172151,42090025,41811530094,and 41625009) the China Postdoctoral Science Foundation(2021M690204) the National Key Research and Development Program(2019YFA0708504&2023YFF0806200) 

主　　题：Volcanic ash Hydrocarbon generation Organic-rich shale Shahejie Formation Jiyang Depression 

摘      要：Globally,most organic-rich shales are deposited with volcanic ash *** ash,a source for many sedimentary basins,can affect the sedimentary water environment,alter the primary productivity,and preserve the organic matter(OM)through physical,chemical,and biological *** an increasing number of breakthroughs in shale oil exploration in the Bohai Bay Basin in recent years,less attention has been paid to the crucial role of volcanic impact especially its influence on the OM enrichment and hydrocarbon ***,we studied the petrology,mineralogy,and geochemical characteristics of the organic-rich shale in the upper submember of the fourth member(Es_(4)^(1))and the lower submember of the third member(Es_(3)^(3))of the Shahejie Formation,aiming to better understand the volcanic impact on organic-rich shale *** results show that total organic carbon is higher in the upper shale intervals rich in volcanic ash with enriched light rare earth elements and moderate Eu *** indicates that volcanism promoted OM formation before or after the *** positive correlation between Eu/Eu*and Post-Archean Australian Shale indicates hydrothermal activity before the volcanic *** plane graph of the hydrocarbon-generating intensity(S1+S2)suggests that the heat released by volcanism promoted hydrocarbon ***,the nutrients carried by volcanic ash promoted biological blooms during Es_(4)^(1 )and Es_(3)^(3) deposition,yielding a high primary *** blooms consume large amounts of oxygen and form anoxic environments conducive to the burial and preservation of ***,this study helps to further understand the organic-inorganic interactions caused by typical geological events and provides a guide for the next step of shale oil exploration and development in other lacustrine basins in China.