Hydrocarbon Generation Characteristics of Source Rocks from Different Saline Environments in the Dongpu Depression,Bohai Bay Basin,China

作     者：LI Wendu ZHANG Pengyuan JIANG Fujie ZHANG Yunxian HUANG Renda XU Tianwu ZHOU Yongshui LI Longlong JIANG Wenli LI Wendu;ZHANG Pengyuan;JIANG Fujie;ZHANG Yunxian;HUANG Renda;XU Tianwu;ZHOU Yongshui;LI Longlong;JIANG Wenli

作者机构：State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective DevelopmentBeijing 100083China State Key Laboratory of Petroleum Resources and ProspectingChina University of Petroleum(Beijing)Beijing 102249China Basin and Reservoir Research CenterChina University of Petroleum(Beijing)Beijing 102249China Zhongyuan Oilfield BranchSINOPECPuyangHenan 457001China Wuxi Research Institute of Petroleum GeologySinopec Petroleum Exploration&Production Research InstituteWuxiJiangsu 214000China Strategy Research Center of Oil and Gas ResourcesMinistry of Land and ResourcesBeijing 100034China 

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

年 卷 期：2021年第95卷第4期

页      面：1260-1278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：granted by the Science Foundation of the Chinese University of Petroleum,Beijing(Grant No.2462020YXZZ021) the National Natural Science Foundation of China(Grant No.41872128) 

主　　题：sapropelite exinite gold-tube pyrolysis experiment hydrocarbon generation evolutionary model Dongpu Depression Bohai Bay Basin 

摘      要：The Dongpu Depression is a secondary salt-bearing tectonic unit in the Bohai Bay Basin,eastern *** depositional environment of this depression regarding its Paleogene strata is clearly different in plane,including the saltwater environment(SE)in the north,the freshwater environment(FE)in the south and the brackish water environment(BE)in the *** result of oil and gas exploration in the Dongpu Depression shows that more than 90%of the proven oil reserves are distributed in the northern saltwater *** studies indicate that the organic geochemistry characteristics and the hydrocarbon generation capacity of the source rocks are very clearly diverse under different environments,which results in the significant differences in the proved reserves between the north and the *** order to further explore the differences in the hydrocarbon generation capacity of the source rocks under distinct depositional environments and the mechanism of their occurrence,three samples from different depositional environments(W18-5 for SE,H7-18 for BE,CH9 for FE)were used for confined gold tube pyrolysis *** results show that the CH4 yields of W18-5,H7-18 and CH9 increase with increasing temperature,the maximum yields being 405.62 mg/g TOC,388.56 mg/g TOC and 367.89 mg/g TOC,*** liquid hydrocarbon yields of W18-5,H7-18 and CH9 firstly increase with increasing temperature and then decrease after the critical *** maximum yields of C6-14 are 149.54 mg/g TOC,140.18 mg/g TOC and 116.94 mg/g TOC,the maximum yields of C14+being 852.4 mg/g TOC,652.6 mg/g TOC and 596.41 mg/g TOC,respectively for W18-5,H7-18 and *** summarize,the order of hydrocarbon potential from high to low is W18-5,H7-18 and *** this basis,through analyzing the influencing factors of hydrocarbon differences,this paper reveals that the saltwater environment is characterized by 4 factors:higher salinity,halophilic algae,high paleo-productivity and a strongly