首页|Hydrocarbon Charging and Accumulation Process of the Large Bozhong19-6 Condensate Gas Reservoirs in the Southwestern Bozhong Sub-Basin,Bohai Bay Basin,China

Hydrocarbon Charging and Accumulation Process of the Large Bozhong19-6 Condensate Gas Reservoirs in the Southwestern Bozhong Sub-Basin,Bohai Bay Basin,China

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The Bozhong19-6(BZ19-6)condensate gas reservoirs,located in the southwestern Bo-zhong sub-basin,Bohai Bay Basin,China,were paleo-oil reservoirs in the geological past and have un-dergone at least three successive hydrocarbon charging events.The hydrocarbon migration and accu-mulation process of"early oil and late gas"has occurred in the current reservoirs.At the end of the sedimentation of the Guantao Formation(N1g,～12 Ma),the reservoirs began to fill with first stage low-moderate mature crude oil.At the late stage of the Lower Minghuazhen Formation(N1ml)(～6.7 Ma),the reservoirs were largely charged with second stage high mature crude oil.Since the deposition of the upper Minghuazhen Formation(N2mu,～5.1 Ma),the paleo-oil reservoirs were transformed into shallow Neogene reservoirs due to the reactivation of basement faults.From the late stage of the N2mu to the present day(～2.8‒0 Ma),the reservoirs were rapidly filled by natural gas within a short period.In ad-dition,analysis of the formation of the reservoir bitumen and the conspicuous loss of the lower molecu-lar weight n-alkanes in the crude oil reveal that the injection of a large amount of gas in the late stage caused gas flushing of the early charged oil.

Bohai Bay BasinBZ19-6 condensate gas reservoirsfluid inclusionshydrocarbon charging and accumulationpetroleum geology

Quanyun Miao、Changgui Xu、Fang Hao、Minjunshi Xie、Qi Wang、Jie Yin、Huayao Zou

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General Prospecting Institute of China National Administration of Coal Geology,Beijing 100039,China

State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum,Beijing 102249,China

Tianjin Branch of China National Offshore Oil Company Ltd.,Tianjin 300452,China

School of Geosciences,China University of Petroleum,Qingdao 266580,China

School of Geosciences,Yangtze University,Wuhan 430100,China

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National Science&Technology Specific Project,China

2016ZX05024-003-008

2024

10.1007/s12583-021-1457-4

地球科学学刊(英文版)
中国地质大学

地球科学学刊(英文版)

CSTPCD
影响因子：0.724
ISSN：1674-487X
年,卷(期)：2024.35(2)
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