Published

2023-08-16

Integrated Interpretation of Eocene-Palaeocene Rocks in Potwar Basin, Pakistan: Implications for Petroleum Generation

Interpretación integrada de rocas del Eoceno y el Paleoceno en la cuenca Potwar, Pakistán: implicaciones para la generación petrolífera

DOI:

https://doi.org/10.15446/esrj.v27n2.105917

Keywords:

Indus Basin, Source rock, Rock-Eval pyrolysis, VR%Ro (en)
Cuenca Indus, roca fuente, Formación Sakesar, Pirólisis Rock-Eval, reflectancia de la vitrinita (es)

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Authors

  • Syed Bilawal Ali Shah University of Malaya

This study demonstrates how an integrated geochemical and petrophysical analysis can be used to evaluate the petroleum generation potential of source and reservoir rocks. The Eocene and Palaeocene sequences of the Potwar Basin, located in the upper Indus Basin of Pakistan, were analyzed. Well logs and Schlumberger log interpretation charts were used for the petrophysical analysis of the Chorgali Formation's reservoir potential. Geochemical methods were applied to 34 well-cutting Sakesar and Patala formations samples. Results from Vitrinite Reflectance (VR) (%Ro) and Tmax data suggest that both formations have reached the peak of their oil generation window. The Sakesar Formation has a mean TOC of 1.88 wt. % and HI values of 375 mg HC/g TOC. The Patala Formation has a mean TOC of 3.33 wt.% in well A and HI values ranging from 2.4 to 369 mg HC/g TOC in well B, with a mean TOC of 3.52 wt%. Both formations have mixed Type II/III kerogen. The findings indicate that both the Sakesar and Patala formations possess good oil/gas-generation potential and may act as source rocks in the Potwar Basin. Petrophysical analysis of the Chorgali Formation shows an average porosity of 10.32%, water saturation of 36.14%, and hydrocarbon saturation of 63.85%. This indicates that the Chorgali Formation has an average to good reservoir potential. The research findings will aid exploration and production companies in the Fimkassar Oilfield.

Este estudio muestra como un análisis geoquímico y petrofísico integrado se puede usar para evaluar el potencial de generación petrolífera de las rocas fuente y reservorio. Con este fin se analizaron las secuencias del Eoceno y del Paleoceno de la cuenca Potwar, localizada en la cuenca superior de Indus, en Pakistán. Se utilizaron los registros de pozo y los gráficos de interpretación de registros de Schlumberger para el análisis petrofísico del potencial reservorio de la Formación Chorgali. Se aplicaron métodos geoquímicos a 34 láminas cortadas de pozo en las formaciones Sakesar y Patala. Los resultados de reflectancia de la vitrinita (VR) (%Ro) y los datos Tmax sugieren que ambas formaciones han alcanzado el pico de su período de generación petrolera. La formación Sakesar tiene una media TOC de 1.88 wt. % y valores HI de 375 mg HC/g TOC. La formación Patala tiene una media TOC de 3.33 wt. % en el pozo A y valores HI que van de 2.4 a 369 mg HC/g TOC en el pozo B, con una media TOC de 3.52 wt. %. Ambas formaciones tienen mezclados tipos II y III de querógeno. Los hallazgos indican que ambas formaciones tienen un buen potencial de generación de petróleo y gas y pueden actuar como las rocas fuentes de la cuenca Potwar. Los análisis petrofísicos de la formación Chorgali muestran un promedio de porosidad de 10.32 %, saturación de agua de 36.14 % y saturación de hidrocarburos de 63.85 %. Esto indica que la Formación Corgali tiene un buen potencial como reservorio. Los resultados del trabajo ayudarán en la exploración y producción de las compañías en el campo petrolero de Fimkassar.

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Shah, S. B. A. (2023). Integrated Interpretation of Eocene-Palaeocene Rocks in Potwar Basin, Pakistan: Implications for Petroleum Generation. Earth Sciences Research Journal, 27(2), 149–162. https://doi.org/10.15446/esrj.v27n2.105917

ACM

[1]
Shah, S.B.A. 2023. Integrated Interpretation of Eocene-Palaeocene Rocks in Potwar Basin, Pakistan: Implications for Petroleum Generation. Earth Sciences Research Journal. 27, 2 (Aug. 2023), 149–162. DOI:https://doi.org/10.15446/esrj.v27n2.105917.

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Shah, S. B. A. Integrated Interpretation of Eocene-Palaeocene Rocks in Potwar Basin, Pakistan: Implications for Petroleum Generation. Earth sci. res. j. 2023, 27, 149-162.

ABNT

SHAH, S. B. A. Integrated Interpretation of Eocene-Palaeocene Rocks in Potwar Basin, Pakistan: Implications for Petroleum Generation. Earth Sciences Research Journal, [S. l.], v. 27, n. 2, p. 149–162, 2023. DOI: 10.15446/esrj.v27n2.105917. Disponível em: https://revistas.unal.edu.co/index.php/esrj/article/view/105917. Acesso em: 31 mar. 2025.

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Shah, Syed Bilawal Ali. 2023. “Integrated Interpretation of Eocene-Palaeocene Rocks in Potwar Basin, Pakistan: Implications for Petroleum Generation”. Earth Sciences Research Journal 27 (2):149-62. https://doi.org/10.15446/esrj.v27n2.105917.

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Shah, S. B. A. (2023) “Integrated Interpretation of Eocene-Palaeocene Rocks in Potwar Basin, Pakistan: Implications for Petroleum Generation”, Earth Sciences Research Journal, 27(2), pp. 149–162. doi: 10.15446/esrj.v27n2.105917.

IEEE

[1]
S. B. A. Shah, “Integrated Interpretation of Eocene-Palaeocene Rocks in Potwar Basin, Pakistan: Implications for Petroleum Generation”, Earth sci. res. j., vol. 27, no. 2, pp. 149–162, Aug. 2023.

MLA

Shah, S. B. A. “Integrated Interpretation of Eocene-Palaeocene Rocks in Potwar Basin, Pakistan: Implications for Petroleum Generation”. Earth Sciences Research Journal, vol. 27, no. 2, Aug. 2023, pp. 149-62, doi:10.15446/esrj.v27n2.105917.

Turabian

Shah, Syed Bilawal Ali. “Integrated Interpretation of Eocene-Palaeocene Rocks in Potwar Basin, Pakistan: Implications for Petroleum Generation”. Earth Sciences Research Journal 27, no. 2 (August 16, 2023): 149–162. Accessed March 31, 2025. https://revistas.unal.edu.co/index.php/esrj/article/view/105917.

Vancouver

1.
Shah SBA. Integrated Interpretation of Eocene-Palaeocene Rocks in Potwar Basin, Pakistan: Implications for Petroleum Generation. Earth sci. res. j. [Internet]. 2023 Aug. 16 [cited 2025 Mar. 31];27(2):149-62. Available from: https://revistas.unal.edu.co/index.php/esrj/article/view/105917

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