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Turbidite Reservoirs in the Dongying sag,Bohai Bay Basin:Interactions between Carbonate Cementation and Hydrocarbon Charge

引用

Acta Geologica Sinica(English Edition) 2021年第2期95卷 617-629页

作者： CHEN Xiaolan ZHOU Zhenzhu JIA Haibo WANG Jian XIA Haiyang CHEN Yong College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590China Stale Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059China School of Geoscience and Technology Southwest Petroleum UniversityChengdu 610500China Key Laboratory of Deep Oil&gas China University of Petroleum(East China)Qingdao 266580China

Turbidite sandstones have become increasingly significant in hydrocarbon *** cementation occur commonly in turbidite reservoirs developing within the Paleocene lacustrine basins,Northeastern *** study utilizes core data,thin section data and production data to investigate the interaction between the carbonate cementation and hydrocarbon charge within turbidite reservoirs in the niuzhuang sub-sag of the Dongying sag,Bohai Bay Basin,East *** results reveal that the carbonate cementation is mainly developed at the top and bottom of the turbidite sandbodies,and even forms carbonate cement *** stages of hydrocarbon accumulation are identified based on fluid inclusion analysis:stage I(27.5–24.6 Ma),stage II(14.0–5.0 Ma),and stage III(5.0–0 Ma).The interaction between the carbonate cementation and hydrocarbon charge has significant controls on the formation of a turbidite *** temporal relations and intensity relations between the two factors should be considered ***,hydrocarbon charge during the early stage can inhibit the carbonate cementation,favoring the hydrocarbon accumulation in turbidite *** deep-lacustrine turbidite sandbodies surrounded by source rocks with abnormal high pressure,are also favorable for hydrocarbon *** results suggest that some deeply buried turbidite sandbodies with similar geological settings have high potential for hydrocarbon exploration.

关键词： turbidite carbonate cementation hydrocarbon charge fluid inclusions niuzhuang sub-sag

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