Organic geochemistry characterization of Late Jurassic bituminous shales and their organofacies and oil generation potential in the Shabwah depression, southeast Sabatayn, Yemen

Hakimi, Mohammed Hail; Al-Matary, Adel M.; Elmahdy, Osama; Hatem, Baleid Ali; Kahal, Ali Y.; Lashin, Aref

doi:10.1016/j.petrol.2020.106951

Cited by 6 publications

(3 citation statements)

References 30 publications

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“…Inertinite macerals have a moderate to high occurrence with a range of 8.33-31.82%, whereas liptinite macerals are less common or virtually absent (0.0-8.33%) (Figure 3(A)). The amount of gas-prone Type III aromatic hydrocarbons is more significant due to the presence of more than 60% Vitrinite maceral in such shales (Table 1; Figure 8( typing is included in the maceral data analysis to support claims about organo-facies features (Hakimi et al 2020c) (Figures 3(B) and 8(A)). Visual examination reveals a high preponderance of AOM (more than 80%) in the kerogen concentrate of all evaluated samples (Figure 3(B)).…”

Section: Organic Petrological Examinationsmentioning

confidence: 94%

Shale-gas potential from Cretaceous succession in South Africa’s Orange Basin: Insights from integrated geochemical evaluations

Yelwa

Mustapha

Opuwari

et al. 2022

Marine Georesources & Geotechnology

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Shale sediments were collected from four Cretaceous stratigraphic units across four explorations well locations in South Africa's Orange Basin and analysed to determine organic-matter characteristics, such as amount, quality, thermal maturity, and their viability as gas resources. The geochemical results show that the Cretaceous shales contain moderate organic quantities, as shown by TOC averagely up to 1.29%. The organic facies consist primarily of Type III kerogen, as proven alongside low hydrogen indexes between 40 and 133 mg HC/g TOC. As seen under a reflected light microscope, the dominance of such land plant-rich organic matter is in harmony with the significant amount of Vitrinite macerals. These organic sediments can produce primarily gas when they mature. The geological and geochemical properties of the organic sediments, chiefly Type III kerogen, generate both wet and dry gas, particularly when adequate thermal maturity is enhanced at deeper locations. Thus, the Orange Basin is considered promising for shale gas exploration and production.

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Section: Organic Petrological Examinationsmentioning

confidence: 94%

Shale-gas potential from Cretaceous succession in South Africa’s Orange Basin: Insights from integrated geochemical evaluations

Yelwa

Mustapha

Opuwari

et al. 2022

Marine Georesources & Geotechnology

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“…In this study, other quantitative analyses of the kerogen microscopy are also used to corroborate the kerogen characteristics (e.g., Cornford 1979;Hakimi et al 2020).…”

Section: Organic Matter (Kerogen) Characteristicsmentioning

confidence: 99%

“…1A). According to previous studies, hydrocarbon exploration activities in the Marib, Shabwah, and Hajar sections focused primarily on the Late Jurassic Lam, Meem, and Saar shale intervals (e.g., Alaug et al 2011;Hakimi and Abdulla 2013a;Hakimi et al 2014;Hakimi and Ahmed 2016;Al-Areeq et al 2018;Hakimi et al 2020). Most of the oils discovered are from the organic-rich shales of the Lam and Meem Members (Hakimi and Abdulla 2013b;Hakimi et al 2019e).…”

Section: Implications On Conventional Petroleum Explorationmentioning

confidence: 99%

Source rock characteristics of organic-rich shales in the Late Jurassic Lam Member and their contribution to oil and gas generation potentials in Al-Jawf exploration region, NW Yemen

et al. 2021

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The shale intervals in the Late Jurassic (Tithonian) Lam Member were collected from four exploration wells in the Al-Jawf region, northwestern Yemen, for combination of organic geochemical and microscopic investigations. This study mainly attempts to provide information on source rock characterization, including quantity, quality, and thermal maturity, and evaluate their suitability as petroleum generation potential, thereby contributing for future petroleum exploration along the Al-Jawf region. The geochemical findings reveal that the shale intervals in the Lam Member have favorable hydrocarbon source rocks with total organic carbon (TOC) contents between 0.50 and 6.43 wt. %, and they have laterally changed from one well site to another. The shale samples also have hydrogen index (HI) values between 50 and 433 mg HC/g TOC, resulting in two dominant organic facies of types II-III and III kerogen, with little type II, and thereby contributing to generate both oil and gas. The high contributions of mixed types of II-III and III kerogen were also demonstrated from the presence of the marine sapropelic organic matter and vitrinite derived from terrigenous plant input as observed by visual kerogen examination. According to both maturity indicators of geochemical T max (417-451 °C) and vitrinite reflectance (VRo) values (0.36-0.86%), the Lam shale intervals from the examined wells in the Al-Jawf region are currently in immature to peak mature of oil window. These thermal maturity levels of the organic matter intervals in the analyzed Lam shales are affected by the burial temperature distributions with the depth. In this regard, the source rock characteristics of the analyzed Lam shale samples in the studied wells are further distributed on the maps, and show that the Lam shales in the southwestern part of the Al-Jawf exploration region in the area around Kamaran-01 well are considered to be effective source rocks for generating amounts of oil.

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Bulk pyrolysis and biomarker fingerprints of Late Cretaceous Galhak Shale Formation in the northern Melut Basin, Sudan: implications on lacustrine oil-source rock

Hakimi

Abas²,

Hadad³

et al. 2021

Arab J Geosci

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Organic geochemistry characterization of Late Jurassic bituminous shales and their organofacies and oil generation potential in the Shabwah depression, southeast Sabatayn, Yemen

Cited by 6 publications

References 30 publications

Shale-gas potential from Cretaceous succession in South Africa’s Orange Basin: Insights from integrated geochemical evaluations

Shale-gas potential from Cretaceous succession in South Africa’s Orange Basin: Insights from integrated geochemical evaluations

Source rock characteristics of organic-rich shales in the Late Jurassic Lam Member and their contribution to oil and gas generation potentials in Al-Jawf exploration region, NW Yemen

Bulk pyrolysis and biomarker fingerprints of Late Cretaceous Galhak Shale Formation in the northern Melut Basin, Sudan: implications on lacustrine oil-source rock

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