气候变化领域集成服务门户(CCPortal): An integrated sequence stratigraphic-geochemical investigation of the Jurassic source rocks in the North Yellow Sea Basin; eastern China

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DOI	10.1306/05212019072
	An integrated sequence stratigraphic-geochemical investigation of the Jurassic source rocks in the North Yellow Sea Basin; eastern China
	Lai H.; Li M.; Jian X.; Wang L.; Liu J.; Wang G.; Liu P.; Dai J.
发表日期	2020
ISSN	0149-1423
起始页码	2145
结束页码	2171
卷号	104 期号:10
英文摘要	The North Yellow Sea Basin (NYSB) is one of the petroliferous basins in the offshore region of eastern China. An integrated sequence stratigraphic-geochemical investigation was carried out to identify and assess the effective source rocks of recent oil discoveries in the NYSB. A total of four third-order sequences (the first [J2SQ1] and second [J2SQ2] third-order sequence within the Middle Jurassic, and the first [J3SQ1] and second [J3SQ2] third-order sequence within the Upper Jurassic) were identified in the Jurassic succession, in which four types of probable source rocks were distinguished, namely, lacustrine deep-water mudstones, lacustrine shallow-water mudstones, prodeltaic mudstones, and deltaic-plain mudstones. The lacustrine deep-water mudstones are widely distributed within the J2SQ1, J2SQ2, and J3SQ2 sequences in the gentle tectonic slope and depression area. They are characterized by moderate total organic carbon (TOC) contents (0.79-3.72 wt. %, with an average of 1.71 wt. %), lower hydrocarbon potential indexes (the amount of free hydrocarbons before analysis [S1] and the amount of hydrocarbons that results from cracking of kerogen [S2], i.e., S1 + S2, in a sample during Rock-Eval pyrolysis) (0.97 mg HC/g rock < S1 + S2 < 7.89 mg HC/g rock, with an average of 3.10 mg HC/g rock), and predominantly type II to type III kerogen. In contrast, the prodeltaic mudstones in J3SQ2 have higher TOC contents (1.5-4.0 wt. %, with an average of 2.71 wt. %), higher S1 + S2 (5.83-25.51 mg HC/g rock, with an average of 14.89 mg HC/g rock), and predominantly type I to type II kerogen. The oil-source correlation results indicate that the oils discovered in the NYSB mainly originated from the prodeltaic J3SQ2 mudstones. The effective source kitchen is mainly located in the northwestern part of the study area. The factors controlling the occurrence of high-quality prodeltaic source rocks are a sufficient supply of nutrients and terrigenous organic matter, high depositional rates, and a suboxic environment. Copyright © 2020. The American Association of Petroleum Geologists. All rights reserved.
英文关键词	Geochemistry; Hydrocarbons; Kerogen; Offshore oil well production; Oil shale; Oils and fats; Organic carbon; Quality control; Stratigraphy; Effective source rocks; Geochemical investigations; Hydrocarbon potential; Oil-source correlation; Petroliferous basins; Rock-Eval pyrolysis; Third-order sequences; Total Organic Carbon; Sedimentary rocks; geochemistry; hydrocarbon; integrated approach; Jurassic; kerogen; mudstone; sequence stratigraphy; source rock; total organic carbon; Pacific Ocean; Yellow Sea
语种	英语
来源期刊	AAPG Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/168684
作者单位	Ministry of Natural Resources (MNR), Key Laboratory of Marine Mineral Resources, Guangzhou Marine Geology Survey, MNR, Guangzhou, China; State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, China; Key Laboratory of Exploration Technologies for Oil and Gas Resources, Ministry of Education and College of Resources and Environment, Yangtze University, Wuhan, China; College of Geosciences, China University of Petroleum (Beijing), Beijing, China; MNR Key Laboratory of Marine Mineral Resources, Guangzhou Marine Geology Survey, MNR, Guangzhou, China
推荐引用方式 GB/T 7714	Lai H.,Li M.,Jian X.,et al. An integrated sequence stratigraphic-geochemical investigation of the Jurassic source rocks in the North Yellow Sea Basin; eastern China[J],2020,104(10).
APA	Lai H..,Li M..,Jian X..,Wang L..,Liu J..,...&Dai J..(2020).An integrated sequence stratigraphic-geochemical investigation of the Jurassic source rocks in the North Yellow Sea Basin; eastern China.AAPG Bulletin,104(10).
MLA	Lai H.,et al."An integrated sequence stratigraphic-geochemical investigation of the Jurassic source rocks in the North Yellow Sea Basin; eastern China".AAPG Bulletin 104.10(2020).