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<p>The Upper Miocene Qawasim Formation is an important hydrocarbon reservoir in the Nile Delta Province. This research focuses on characterizing the Late Miocene Qawasim Formation in the El Basant Gas Field, located in the Eastern part of the East Nile Delta onshore, 12.5&#xa0;km south of El Manzala Lake, covering approximately 30.66 km<sup>2</sup>. By integrating well logs, core analysis, petrographic thin sections, X-ray diffraction, and drilling data from five wells, this study identifies opportunities for enhancing our understanding of the subsurface geology reservoir characterization and reservoir potential of the El Basant Gas Field. The study area is characterized by step normal faults oriented northeast-southwest and northwest-southeast. Lithological analysis reveals abundant shale and sandstone facies, indicating significant gas potential. Petrophysical analysis confirms the Qawasim Formation as the primary reservoir, with a net pay thickness of about 23&#xa0;m, effective porosity of around 34%, and hydrocarbon saturation of about 52%. A detailed 3D model assessed the influence of structural setting, facies, and petrophysical properties on the Qawasim Formation. Integrating these findings, two highly prospective locations were identified, with estimated Gas Initial In Place (GIIP) values of approximately 29.563 million cubic feet.</p>

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Evaluation of the Qawasim Formation through integration of available data from El Basant wells, Nile Delta, Egypt

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Ahmed Sedki,
  • Mohamed Abd Elkhalek Mahmoud Abdelhady,
  • Hany Elsayed Ahmed,
  • Mohamed Reda

摘要

The Upper Miocene Qawasim Formation is an important hydrocarbon reservoir in the Nile Delta Province. This research focuses on characterizing the Late Miocene Qawasim Formation in the El Basant Gas Field, located in the Eastern part of the East Nile Delta onshore, 12.5 km south of El Manzala Lake, covering approximately 30.66 km2. By integrating well logs, core analysis, petrographic thin sections, X-ray diffraction, and drilling data from five wells, this study identifies opportunities for enhancing our understanding of the subsurface geology reservoir characterization and reservoir potential of the El Basant Gas Field. The study area is characterized by step normal faults oriented northeast-southwest and northwest-southeast. Lithological analysis reveals abundant shale and sandstone facies, indicating significant gas potential. Petrophysical analysis confirms the Qawasim Formation as the primary reservoir, with a net pay thickness of about 23 m, effective porosity of around 34%, and hydrocarbon saturation of about 52%. A detailed 3D model assessed the influence of structural setting, facies, and petrophysical properties on the Qawasim Formation. Integrating these findings, two highly prospective locations were identified, with estimated Gas Initial In Place (GIIP) values of approximately 29.563 million cubic feet.