气候变化领域集成服务门户(CCPortal): Tectonic control on hydrocarbon generation in the northwestern Neuquén Basin; Argentina

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DOI	10.1306/05082018171
	Tectonic control on hydrocarbon generation in the northwestern Neuquén Basin; Argentina
	Karg H.; Littke R.
发表日期	2020
ISSN	0149-1423
起始页码	2173
结束页码	2208
卷号	104 期号:10
英文摘要	The petroleum systems of the Malargüe fold-thrust belt in the northwestern Neuquén Basin, Argentina, comprise multiple reservoir and seal rocks and three major source rocks of the Lower Jurassic (Los Molles Formation [Fm.]), the lower Tithonian to lower Valanginian (Vaca Muerta Fm.), and the lower Hauterivian to lower Barremian (Agrio Fm.). The thermal history of the Mesozoic source rocks has been reconstructed using one-dimensional and two-dimensional modeling. The most important factors that affected the source-rock maturation are the timing of maximum Late Cretaceous to Paleogene burial and the heat flow during back-arc extension. We postulate that synclines have been buried over longer periods and source-rock maturation ceased earlier in anticlines, accordingly. Hydrocarbon generation from the Vaca Muerta Fm. and Agrio Fm. has started during the Campanian. Despite late-stage magmatic activity causing local thermal perturbations, the models suggest that the thermal field has been dominated by conductive heat transport and that heat flow has been a response to the evolution from back-arc extension to orogenic shortening. High heat flows of 85 mW/m2 during back-arc extension between the latest Cretaceous and Paleogene have been modeled. Two main source pods supply hydrocarbons until the present. They are related to structurally deep footwall positions of thrust faults, active since the Late Cretaceous, and to deep frontal synclines, having formed through late-stage thick-skinned tectonics since the Neogene. Modeling of hydrocarbon fluid type is consistent with existing oil fields exhibiting light and medium oils with API between 22° API and 39° API, charged from early- to peak-mature source rocks. Copyright © 2020. The American Association of Petroleum Geologists. All rights reserved.
英文关键词	Faulting; Heat transfer; Hydrocarbons; Oil fields; Rocks; Back-arc extensions; Fold-thrust belts; Hydrocarbon fluids; Hydrocarbon generation; Magmatic activity; Thermal perturbations; Thick-skinned tectonics; Two dimensional model; Petroleum geology; Barremian; footwall; Hauterivian; heat flow; hydrocarbon generation; hydrocarbon reservoir; Jurassic; Mesozoic; Paleogene; source rock; thrust; Tithonian; Valanginian; Argentina
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/168685
作者单位	Wintershall Energía S.A., Buenos Aires, Argentina; Saudi Arabian Oil Company, Dhahran, Saudi Arabia; Institute of Geology and Geochemistry of Petroleum and Coal, Energy and Mineral Resources Group, RWTH Aachen University, Aachen, Germany
推荐引用方式 GB/T 7714	Karg H.,Littke R.. Tectonic control on hydrocarbon generation in the northwestern Neuquén Basin; Argentina[J],2020,104(10).
APA	Karg H.,&Littke R..(2020).Tectonic control on hydrocarbon generation in the northwestern Neuquén Basin; Argentina.AAPG Bulletin,104(10).
MLA	Karg H.,et al."Tectonic control on hydrocarbon generation in the northwestern Neuquén Basin; Argentina".AAPG Bulletin 104.10(2020).