Constraining multi-stage and protracted oil generation of alkaline lacustrine source rocks by heteroatomic compounds

doi:10.1016/j.orggeochem.2023.104668

	Constraining multi-stage and protracted oil generation of alkaline lacustrine source rocks by heteroatomic compounds
	Zhang, Jingkun 3; Cao, Jian 2; Xiang, Baoli 1; Zhou, Ni 1; Ma, Wanyun 1; He, Dan 1
刊名	ORGANIC GEOCHEMISTRY
	2023-10-01
卷号	184 页码:12
关键词	Nitrogen-containing compounds Heteroatomic geochemistry Alkaline lacustrine source rocks Fengcheng Formation Junggar Basin
ISSN号	0146-6380
DOI	10.1016/j.orggeochem.2023.104668
通讯作者	Cao, Jian(jcao@nju.edu.cn)
英文摘要	It is unclear whether source rocks deposited in ancient alkaline lakes undergo multiple stages of hydrocarbon generation, particularly of oils. In this study, the lower Permian Fengcheng Formation in the Junggar Basin, China, was investigated using the geochemistry of heteroatomic species, with a focus on N-containing com-pounds, by negative-ion electrospray high-resolution Fourier transform ion cyclotron resonance mass spec-trometry. The maturity parameters based on N-containing compounds (e.g., C0-5/C15-35-DBE 12 N1 and C0-5/ C15-35-DBE 15 N1) and aromatic hydrocarbons (TMNr) reveal progressive generation of mature to highly mature crude oils. The polymerization index P1 ([DBE 18 + DBE 15]/DBE 12_N1), alkylation index R1 (RC6_ 35/RC0-5), and paleo-salinity index (beta carotane/nCmax) of the Fengcheng Formation source rocks suggest that the high salinity inhibited molecular polymerization of organic matter and prolonged the oil generation peak, which produced highly mature crude oils in the late stages of hydrocarbon generation. Therefore, alkaline lacustrine source rocks undergo multiple stages of protracted oil generation, which results in a longer oil window and higher threshold for gas generation than in the case of the classic Tissot model. The results highlight the oil generation potential of deep basins containing alkaline lacustrine source rocks and highly mature organic matter, which also have a lower gas-generation potential than previously thought.
资助项目	National Natural ScienceFoundation of China[42102148] ; National Natural ScienceFoundation of China[42230808]
WOS关键词	NORTHWESTERN JUNGGAR BASIN ; ACIDIC NSO COMPOUNDS ; CRUDE OILS ; NW CHINA ; FENGCHENG FORMATION ; MATURITY ; PETROLEUM ; MIGRATION ; PYROLYSIS ; ORIGIN
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:001074590900001
资助机构	National Natural ScienceFoundation of China
内容类型	期刊论文
源URL	[http://ir.nigpas.ac.cn/handle/332004/42730]
专题	中国科学院南京地质古生物研究所
通讯作者	Cao, Jian
作者单位	1.PetroChina Xinjiang Oilfield Co, Res Inst Expt & Testing, Karamay 834000, Xinjiang, Peoples R China 2.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing 210023, Jiangsu, Peoples R China 3.Chinese Acad Sci, State Key Lab Palaeobiol & Stratig, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jingkun,Cao, Jian,Xiang, Baoli,et al. Constraining multi-stage and protracted oil generation of alkaline lacustrine source rocks by heteroatomic compounds[J]. ORGANIC GEOCHEMISTRY,2023,184:12.
APA	Zhang, Jingkun,Cao, Jian,Xiang, Baoli,Zhou, Ni,Ma, Wanyun,&He, Dan.(2023).Constraining multi-stage and protracted oil generation of alkaline lacustrine source rocks by heteroatomic compounds.ORGANIC GEOCHEMISTRY,184,12.
MLA	Zhang, Jingkun,et al."Constraining multi-stage and protracted oil generation of alkaline lacustrine source rocks by heteroatomic compounds".ORGANIC GEOCHEMISTRY 184(2023):12.