Prototypes,modifications,and hydrocarbon enrichment variations in basins influenced by Tethyan evolution:A comparative analysis of the Persian Gulf Basin and the Sichuan Basin  

作　　者：Zhiliang HE Zhijun JIN Shuangjian LI Guoping BAI Xueyan LV Jinrui GUO Jian GAO Jinyin YIN Yingqiang LI Dingye ZHENG 

机构地区：[1]China Petroleum&Chemical Corporation,Beijing 100728,China [2]Institute of Energy,Peking University,Bejing 100871,China [3]SINOPEC Petroleum Exploration and Production Research Institute,Beijing 102206,China [4]SINOPEC Key Laboratory of Geology and Resources in Deep Stratum,Beijing 102206,China

出　　处：《Science China Earth Sciences》2023年第12期2871-2897,共27页中国科学（地球科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.92255302,U19B6003 and 42002137)。

摘　　要：The hydrocarbon accumulation modes and differences in the Tethyan realm serve as a hot research topic in the petroleum geology community at home and abroad.Both the Persian Gulf Basin in the Middle East and the Sichuan Basin in China,situated on the southern and northern sides of the Tethyan realm,respectively,record the whole geological process of the opening and closure of the Prototethys,the Paleotethys,and the Neotethys sequentially,exhibiting anomalous hydrocarbon enrichment.Based on the analysis of the plate tectonic evolution in the Tethyan realm,this study dissects the structures and hydrocarbon accumulation conditions of both basins.Followed by a systematic comparative analysis of the factors controlling hydrocarbon enrichment in the process of plate breakup and convergence in the Tethyan realm,this study proposes petroleum exploration targets in the realm.The results are as follows:(1)Since the Meso-Neoproterozoic,the Persian Gulf Basin and the Sichuan Basin have undergone similar tectonic evolution in the early stage but different in the late stage.Under the influence of the formation and evolution of the Prototethys,Paleotethys,and Neotethys oceans,both basins experienced multi-stage development and modification,forming two major extension-convergence cycles.Consequently,both basins are characterized by the vertical orderly superimposition of various basin prototypes in the order of rift-intracratonic basin(passive continental margin)-foreland.(2)The fact that the Tethyan realm was long located at medium-low latitudes and the local anoxic environment formed in the process of plate breakup and convergence played a vital role in the formation of extensive source rocks.The source rocks are predominantly distributed in underfilled rifts and deep depressions that were connected to the ocean in the unidirectional continental breakup process;basin-slopes and intra-shelf basins on passive continental margins;basinal lows within intracratonic basins,and underfilled foredeeps in foreland basins.The favorable ar

关 键 词：Tethyan realm Unidirectional breakup and convergence Basin prototype Structural modification Hydrocarbon enrichment Exploration target Persian Gulf Basin Sichuan Basin 

分 类 号：P618.13[天文地球—矿床学]