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The effect of paleo-environment on hydrocarbon generation potential: Example from Vaca Muerta Formation, Neuquén Basin, Argentina
Abstract
A 137-m continuous core from the Jurassic-Early Cretaceous marine derived oil shale with the maturity Ro about 0.7 %, representing the oil window in the Vaca Muerta Formation, Neuquén Basin, Argentina, was examined using geological, mineralogical, petrographic, and geochemistry techniques. Three distinct intervals were identified within the core: the upper carbonate-rich section with intense bioturbation, indicating dysoxic to oxic conditions that resulted in poor organic matter preservation; a middle section with decreasing carbonate content, suboxic bottom conditions, and higher organic matter content; and a lower section with higher detrital input and low carbonate content, suboxic to anoxic water conditions, and enhanced preservation of organic matter. Based on the presence of indicator fossils and geochemical parameters, a general trend of increasing organic matter content with lower paleo-oxygen levels was observed. The proportion of solid bitumen within organic matter increases with decreasing oxygen content, suggesting that organic matter deposited in anoxic conditions is more prone to transformation and hydrocarbon generation. There is a negative impact of increasing paleo-oxygen levels on the quantity and quality of organic matter, represented by its potential to generate hydrocarbons.
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Authors (5)
-
Grzegorz Lis
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Maria Mastalerz dr
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Fariborz Goodarzi Dr
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Hamed Sanei
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
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JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
no. 208,
ISSN: 0920-4105 - Language:
- English
- Publication year:
- 2022
- Bibliographic description:
- Małachowska A., Lis G., Mastalerz M., Goodarzi F., Sanei H.: The effect of paleo-environment on hydrocarbon generation potential: Example from Vaca Muerta Formation, Neuquén Basin, Argentina// JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING -Vol. 208,iss. Part A (2022), s.109342-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.petrol.2021.109342
- Sources of funding:
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- Free publication
- Verified by:
- Gdańsk University of Technology
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