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primary topic: Geochemical and Petrological Characterization of the Early Eocene Carbonaceous Shales: Implications for Oil and Gas Exploration in the Barmer Basin, Northwest India

Geochemical and Petrological Characterization of the Early Eocene Carbonaceous Shales: Implications for Oil and Gas Exploration in the Barmer Basin, Northwest India
type: AcademicArticle
type: Article
abstract: Carbonaceous shales of the Early Eocene Dharvi/Dunger Formation in the onshore Barmer Basin, northwest India were studied for the first time by integrating geochemical and organic petrological analyses. The carbonaceous shales of the Early Eocene Dharvi/Dunger Formation are characterized by a higher organic carbon content (TOC) of >10 wt and consist mainly of a mixture of organic matter of types II and III kerogen, with exhibited hydrogen index values ranging between 202 and 292 mg HC/g TOC. The dominance of such kerogen is confirmed by the high amounts of huminite and fluorescent liptinite macerals. Consequently, the carbonaceous shales of the Early Eocene Dharvi/Dunger Formation are promising source rocks for both oil and gas generation potential, with oils of high wax contents, according to pyrolysis-gas chromatography results. The chemical and optical maturity results such as low values huminite/vitrinite reflectance, production index, and Tmaxshow that most of the examined carbonaceous shale rocks from the outcrop section of the Kapurdi mine have entered the low maturity stage of oil generation, exhibiting a range of immature to the very early-mature. Therefore, as highlighted in this study, the substantial abundance in hydrocarbon generation potential from these carbonaceous shales in the Dharvi/Dunger Formation may represent future conventional petroleum exploration in the southern part of the Barmer Basin, where the Dharvi/Dunger Formation has reached deeper burial depths. © 2022 American Chemical Society. All rights reserved.
date: 2022
volume: 7
issue: 47
is part of: ACS Omega
status: peerReviewed
status: published
author list: authors
type: EPrint
type: ArticleEPrint
is part of: repository

American Chemical Society
type: Organization

ACS Omega
type: Collection
issn: 24701343

A.K. Singh
type: Person
given name: A.K.
family name: Singh

K.A. Mustapha
type: Person
given name: K.A.
family name: Mustapha

N.S. Zainal Abidin
type: Person
given name: N.S.
family name: Zainal Abidin

A. Rahim
type: Person
given name: A.
family name: Rahim

A. Kumar
type: Person
given name: A.
family name: Kumar

M.H. Hakimi
type: Person
given name: M.H.
family name: Hakimi

N.A. Yelwa
type: Person
given name: N.A.
family name: Yelwa

W.H. Abdullah
type: Person
given name: W.H.
family name: Abdullah

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primary topic: Geochemical and Petrological Characterization of the Early Eocene Carbonaceous Shales: Implications for Oil and Gas Exploration in the Barmer Basin, Northwest India