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

作　　者：CHEN Xiaolan ZHOU Zhenzhu JIA Haibo WANG Jian XIA Haiyang CHEN Yong 

机构地区：[1]College of Earth Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China [2]Stale Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China [3]School of Geoscience and Technology,Southwest Petroleum University,Chengdu 610500,China [4]Key Laboratory of Deep Oil&gas,China University of Petroleum(East China),Qingdao 266580,China

出　　处：《Acta Geologica Sinica(English Edition)》2021年第2期617-629,共13页地质学报（英文版）

基　　金：supported by the Open Fund(Grant No.PLC20190101)of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology;the National Natural Science Foundation of China(Grant No.41703060);the Fundamental Research Funds for the Central Universities(Grant No.20CX02118A);the Opening Fund of Key Laboratory of Deep Oil&Gas,the Major Scientific and Technological Innovation Project of Shandong Province(Grant Nos.2017CXGC1602,2017CXGC1608);the Innovation Project of Postgraduate in Shandong University of Science and Technology(Grant No.SDKDYC190211)。

摘　　要：Turbidite sandstones have become increasingly significant in hydrocarbon exploration.Carbonate cementation occur commonly in turbidite reservoirs developing within the Paleocene lacustrine basins,Northeastern China.This 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 China.The results reveal that the carbonate cementation is mainly developed at the top and bottom of the turbidite sandbodies,and even forms carbonate cement shells.Three 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 reservoir.The temporal relations and intensity relations between the two factors should be considered significantly.Moreover,hydrocarbon charge during the early stage can inhibit the carbonate cementation,favoring the hydrocarbon accumulation in turbidite reservoirs.Many deep-lacustrine turbidite sandbodies surrounded by source rocks with abnormal high pressure,are also favorable for hydrocarbon accumulation.These 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 

分 类 号：P618.13[天文地球—矿床学]