Method for identifying effective carbonate source rocks:a case study from Middle-Upper Ordovician in Tarim Basin,China

作     者：Jun-Qing Chen Xiong-Qi Pang Song Wu Zhuo-Heng Chen Mei-Ling Hu Luo-Fu Liu Kui-You Ma Bo Pang Zhi-Peng Huo Jun-Qing Chen;Xiong-Qi Pang;Song Wu;Zhuo-Heng Chen;Mei-Ling Hus;Luo-Fu Liu;Kui-You Ma;Bo Pang;Zhi-Peng Huo

作者机构：State Key Laboratory of Petroleum Resources and ProspectingChina University of PetroleumBeijing 102249China Beijing Key Laboratory of Optical Detection Technology for Oil and GasChina University of PetroleumBeijing 102249China College of GeoscienceChina University of PetroleumBeijing 102249China Geological Survey of CanadaCalgaryAB T2L 2A7Canada Research Institute of Petroleum Exploration and DevelopmentPetroChina Huabei Oilfi eld CompanyRenqiu 062550HebeiChina China University of GeosciencesBeijing 100083China 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2020年第17卷第6期

页      面：1491-1511页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

基　　金：financially supported by the Science Foundation of China University of Petroleum,Beijing(Grant No.2462020BJRC005) the Joint Funds of National Natural Science Foundation of China(Grant No.U19B6003-02) 

主　　题：Effective carbonate source rock Mass balance approach Low present-day TOC Ordovician Tarim Basin 

摘      要：Hydrocarbon expulsion occurs only when pore fluid pressure due to hydrocarbon generation in source rock exceeds the force against migration in the adjacent carrier *** the Middle-Upper Ordovician carbonate source rock of Tarim Basin in China as an example,this paper proposes a method that identifies effective carbonate source rock based on the principles of mass *** from the Well YW2 indicate that the Middle Ordovician Yijianfang Formation contains effective carbonate source rocks with low present-day *** and geochemical analysis suggests that the hydrocarbons in the carbonate interval are likely self-generated and *** steranes from GC-MS analysis of oil extracts in this interval display similar features to those of the crude oil samples in Tabei area,indicating that the crude oil probably was migrated from the effective source *** applying to other wells in the basin,the identified effective carbonate source rocks and non-source rock carbonates can be effectively identified and consistent with the actual exploration results,validating the *** the contribution from the identified effective source rocks with low present-day TOC(TOC_(pd))is considered,the long-standing puzzle between the proved 3 P oil reserves and estimated resources in the basin can be reasonably explained.