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<p>Well log analysis is crucial in the characterization of the subsurface reservoirs, which helps in assessing reservoir properties like porosity, permeability, water, and hydrocarbon saturation. In the present study, two wells (Meyal-08 and Meyal-09) in the Potwar Plateau, Pakistan, were analyzed for reservoir evaluation of the Eocene Carbonates, Chorgali and Sakessar Formations. Conventional well logs, including, gamma ray, density-neutron, caliper, sonic, and resistivity logs, were utilized to derive various petrophysical parameters. In Meyal-08, the Chorgali Formation has 20&#xa0;m of net pay thickness with 7% porosity, 56% hydrocarbon saturation, and 14% clay content, signifying encouraging permeability. The net pay zone thickness in the Sakesar Formation is 6&#xa0;m, possessing 10% porosity, 67% hydrocarbon saturation, and 16% clay content, which indicate good reservoir quality. In Meyal-09, the Chorgali Formation also shows the same characteristics with lesser hydrocarbon saturation, whereas the Sakessar Formation has a permeable zone with a porosity of 10%, a hydrocarbon saturation of 76%, and clay content of 23%, also matching with the observations in the Meyal-08 well. Cross-plots for lithologies validate that the limestone is the predominant rock in both the studied formations and support their reservoir quality. This research shows that the Chorgali and Sakessar formations of Potwar Plateau have good petrophysical properties and considerable petroleum potential. These results will further help in finding the potential reservoirs for the growing energy requirement of Pakistan’s energy sector.</p>

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Reservoir characterization for hydrocarbon assessment of Eocene carbonates in Meyal area, Potwar Plateau, Pakistan: implications from geophysical logs data

  • 期刊论文

  • 发表日期：

    2026年2月16日

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  • Yasir Hamid,
  • Muhammad Kamran,
  • Syed Mamoon Siyar,
  • Saqib Mehmood,
  • Taqweem Ul Haq Ali,
  • Fayaz Ali,
  • Ibrar Ul Haq,
  • Izhar Ullah,
  • Kamran Shams,
  • Sartaj Husain

摘要

Well log analysis is crucial in the characterization of the subsurface reservoirs, which helps in assessing reservoir properties like porosity, permeability, water, and hydrocarbon saturation. In the present study, two wells (Meyal-08 and Meyal-09) in the Potwar Plateau, Pakistan, were analyzed for reservoir evaluation of the Eocene Carbonates, Chorgali and Sakessar Formations. Conventional well logs, including, gamma ray, density-neutron, caliper, sonic, and resistivity logs, were utilized to derive various petrophysical parameters. In Meyal-08, the Chorgali Formation has 20 m of net pay thickness with 7% porosity, 56% hydrocarbon saturation, and 14% clay content, signifying encouraging permeability. The net pay zone thickness in the Sakesar Formation is 6 m, possessing 10% porosity, 67% hydrocarbon saturation, and 16% clay content, which indicate good reservoir quality. In Meyal-09, the Chorgali Formation also shows the same characteristics with lesser hydrocarbon saturation, whereas the Sakessar Formation has a permeable zone with a porosity of 10%, a hydrocarbon saturation of 76%, and clay content of 23%, also matching with the observations in the Meyal-08 well. Cross-plots for lithologies validate that the limestone is the predominant rock in both the studied formations and support their reservoir quality. This research shows that the Chorgali and Sakessar formations of Potwar Plateau have good petrophysical properties and considerable petroleum potential. These results will further help in finding the potential reservoirs for the growing energy requirement of Pakistan’s energy sector.