Significance of gypsum-salt rock series for marine hydrocarbon accumulation  

作　　者：Wenhui Liu Heng Zhao Quanyou Liu Bing Zhou Dianwei Zhang Jie Wang Longfei Lu Houyong Luo Qingqiang Meng Xiaoqi Wu 

机构地区：[1]State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,SINOPEC,Beijing 100083,China [2]Petroleum Exploration&Production Research Institute,SINOPEC,Beijing 100083,China [3]Northwest University,Shaanxi 710069,China [4]Lanzhou Center for Oil and Gas Resources,Institute of Geology and Geophysics,Chinese Academy of Sciences,Gansu 730000,China [5]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Petroleum Research》2017年第3期222-232,共11页石油研究（英文）

基　　金：The work was supported by the National Key Basic Research Program of China(973 Program)(No.2012CB214801);the National Natural Science Foundation of China(No.U1663201).

摘　　要：With further exploration and research,the gypsum-salts rock series as good caprocks attracted a lot of attention.The gypsum-salt rock series played an important role during migration,preservation and trapping of hydrocarbons.Recently,major breakthroughs have been continuously made in marine petroleum exploration of gypsum-salt rock series in the eastern Ordos Basin,the central Tarim Basin and the western Sichuan Basin in China,and the high-evolution and low-abundance gypsum-salt rock series as hydrocarbon source rocks become possible.Besides research advances in the reservoirecaprock assemblage of gypsum-salt rock series,development and hydrocarbon-generation potential of source rocks in the gypsum-salt rock series were well studied in terms of source-rock development environment and hydrocarbon generation mechanism.Results showed that the gypsum-salt rock series,including high-evolution and low-TOC gypsum-salt rock series in China,could be regarded as good source rocks.This understanding was a breakthrough to previous traditional viewpoint that low-TOC gypsum-salt rock series could not act as effective hydrocarbon sources.The key to understand hydrocarbon-generation mechanism was that abundant and high-quality hydrocarbon-generation materials,large amount of hydrocarbon generation and conversion in geological history,and hydrocarbongeneration materials occurred in the form of carboxylates,were developed in the high-evolution and low-TOC gypsum-salt rock series.

关 键 词：Gypsum-salt rock series Hydrocarbon generation Source rock Sedimentary environment Reservoir CAPROCK 

分 类 号：P61[天文地球—矿床学]