The origin of oil in the Cretaceous succession from the South Pars Oil Layer of the Persian Gulf

Rahmani, Omeid; Aali, Jafar; Junin, Radzuan; Mohseni, Hassan; Padmanabhan, Eswaran; Azdarpour, Amin; Zarza, Sahar; Moayyed, Mohsen; Ghazanfari, Parviz

doi:10.1007/s00531-012-0855-3

Cited by 7 publications

(16 citation statements)

References 46 publications

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“…What is known about the structure of the South Pars field (Figure 1) is derived mainly from a few primary studies conducted by Aali et al [18], Rahmani et al [4,17], and Aali and Rahmani [19,20]. The South Pars field involves the most significant non-associated gas accumulation in the world.…”

Section: Tectonic Settingmentioning

confidence: 99%

“…It is located in the interior of the Arabian Plate platform and considered as the northern extension of Qatar's North field. In the north and northeast, the structural feature of the South Pars field has been bounded by the Zagros fold belt [4].…”

Section: Tectonic Settingmentioning

confidence: 99%

“…The issue of source rocks that produced the oil and gas has received considerable critical attention [1][2][3][4][5][6]. What known about the source rocks, total organic carbon (TOC) has been the most crucial concept in the study of the source rocks [7].…”

Section: Introductionmentioning

confidence: 99%

“…Through using the modified ∆LogR, the results from the geochemical analysis, i.e., Rock-Eval pyrolysis, and petrophysical data were first discussed, and then their effects on the determination of the OM content were evaluated. As a case study, the Gadvan Formation, an effective source rock in the Dezful Embayment [1] and the South Pars field [4,16,17], was selected to apply the ∆LogR technique with its modified approach for determining the accurate content of TOC in source rocks.…”

Section: Introductionmentioning

confidence: 99%

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Geochemical Analysis for Determining Total Organic Carbon Content Based on ∆LogR Technique in the South Pars Field

et al. 2019

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There is a recognized need for the determination of total organic carbon (TOC) as an essential factor in the evaluation of source rocks. In this study, the ∆LogR technique was coupled with logging curves of sonic, resistivity, spectral gamma-ray (SGR), and computed gamma-ray (CGR) to determine an accurate content of TOC in the Gadvan Formation. Multiple linear regression analysis was also applied to the ∆LogR technique. To this aim, 14 samples of the Gadvan Formation were taken from Wells B and C in the South Pars field and analyzed using Rock-Eval pyrolysis. Results from the ∆LogR technique and multiple linear regression analysis, well logs, and Rock-Eval were compared to calculate the accurate content of TOC in the Gadvan Formation. Geochemical data confirmed that the Gadvan Formation was a relatively poor source rock in the South Pars field, as average TOC and Tmax values of the samples were 0.79 and less than 430 °C, respectively. Also, the content of potassium (K < 0.1%) confirmed the origin of the source rock as a pure carbonate, whereas the low content of thorium (Th < 5 ppm) was indicative of the percentage of clays. There was a moderate content of uranium (U < 10 ppm), suggesting that the Gadvan Formation was not deposited in an excellent reducing environment to conserve the organic matter. Moreover, the results from the integration of the multiple linear regression model with SGR and CGR showed that the value of R2 was higher than the results obtained without SGR and CGR. Findings from this study could help the exploration and production team to determine the accurate content of TOC using the ∆LogR technique in association with logging curves.

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Section: Tectonic Settingmentioning

confidence: 99%

Section: Tectonic Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Geochemical Analysis for Determining Total Organic Carbon Content Based on ∆LogR Technique in the South Pars Field

et al. 2019

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“…The Burgan and Nahr Umr formations are the regional equivalents of the Kazhdumi Formation in the Arabian parts of the Persian Gulf (Rahmani et al 2010). The underlying and overlying formations of the Kazhdumi Formation are the Sarvak and Dariyan formations, respectively (Rahmani et al 2013). …”

Section: Kazhdumi Formationmentioning

confidence: 99%

Burial and thermal maturity modeling of the Middle Cretaceous–Early Miocene petroleum system, Iranian sector of the Persian Gulf

Mashhadi

Rabbani

Kamali³

et al. 2015

Pet. Sci.

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The Cretaceous Kazhdumi and Gurpi formations, Ahmadi Member of the Sarvak Formation, and Paleogene Pabdeh Formation are important source rock candidates of the Middle Cretaceous-Early Miocene petroleum system in the Persian Gulf. This study characterizes generation potential, type of organic matter, and thermal maturity of 262 cutting samples (marls and argillaceous limestones) from these rock units taken from 16 fields in the Iranian sector of the Persian Gulf. In addition, the burial and thermal histories of these source rocks were analyzed by one-dimensional basin modeling. Based on the total organic carbon and genetic potential values, fair hydrocarbon generation potential is suggested for the studied samples. Based on T max and vitrinite reflectance values, the studied samples are thermally immature to mature for hydrocarbon generation. The generated models indicate that studied source rocks are immature in central wells. The Gurpi and Pabdeh formations are immature and the Ahmadi Member and Kazhdumi Formation are early mature in the western wells. The Pabdeh Formation is within the main oil window and other source rocks are at the late oil window in the eastern wells. The hydrocarbon expulsion from the source rocks began after deposition of related caprocks which ensures entrapment and preservation of migrated hydrocarbon.

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Geochemical characteristics of the Silurian-Devonian Kroh black shales, Peninsular Malaysia: An implication for hydrocarbon exploration

Shoieb

Tsegab

Rahmani

et al. 2022

Journal of Geochemical Exploration

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The origin of oil in the Cretaceous succession from the South Pars Oil Layer of the Persian Gulf

Cited by 7 publications

References 46 publications

Geochemical Analysis for Determining Total Organic Carbon Content Based on ∆LogR Technique in the South Pars Field

Geochemical Analysis for Determining Total Organic Carbon Content Based on ∆LogR Technique in the South Pars Field

Burial and thermal maturity modeling of the Middle Cretaceous–Early Miocene petroleum system, Iranian sector of the Persian Gulf

Geochemical characteristics of the Silurian-Devonian Kroh black shales, Peninsular Malaysia: An implication for hydrocarbon exploration

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