The effect of paleo-environment on hydrocarbon generation potential: Example from Vaca Muerta Formation, Neuquén Basin, Argentina

Aleksandra Małachowska; Grzegorz Lis; Maria Mastalerz; Fariborz Goodarzi; Hamed Sanei

doi:10.1016/j.petrol.2021.109342

The effect of paleo-environment on hydrocarbon generation potential: Example from Vaca Muerta Formation, Neuquén Basin, Argentina

Abstrakt

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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Autorzy (5)

Aleksandra Małachowska dr inż.
Grzegorz Lis
Maria Mastalerz dr
Fariborz Goodarzi Dr
Hamed Sanei

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Słowa kluczowe

VACA MUERTA SHALE ORGANIC MATTER HYDROCARBON POTENTIAL PALEO-OXYGEN LEVEL BODY AND TRACE FOSSILS SOLID BITUMEN

Informacje szczegółowe

Kategoria:

Publikacja w czasopiśmie

Typ:

artykuły w czasopismach

Opublikowano w:

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING nr 208,
ISSN: 0920-4105

Język:

angielski

Rok wydania:

2022

Opis bibliograficzny:

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-

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