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<p>Once thought to be impermeable, crystalline basement rocks are increasingly being identified as possible unconventional hydrocarbon reservoirs all over the world. They provide examples all over the world, like Bach Ho in Vietnam, Renqiu in China, and La Paz in Venezuela, that have shown basement fractures and weathering can hold significant production when structural and geochemical conditions are favorable. Within this international setting, the Gulf of Suez Basin is one of the most promising provinces in Egypt to explore the basement. Its tectonic regime pertaining to rifting has formed fractured metamorphic and granitic basement highs charged with overlying Nubian and Miocene source rocks topped by thick evaporites. A recent geophysical and petrophysical investigation of the Rabeh East oil field in the southern Gulf of Suez exemplifies this prospectivity. Seismic interpretation revealed fault-controlled basement traps, and well RE-25 hit an interval of 11% porosity and excellent water saturation (60%), and in the process, proved fractured/weathered granite as a viable reservoir. They highlight basement play in Egypt as significant on an international scale and demand high-resolution imaging, fracture modeling, and horizontal drilling to unlock its resources. The Gulf of Suez is thus a natural laboratory for international geoscientists investigating unconventional basement reservoirs.</p>

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Unlocking the potential of basement rocks as unconventional reservoirs in the Gulf of Suez basin

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • Mohammad Abdelfattah Sarhan

摘要

Once thought to be impermeable, crystalline basement rocks are increasingly being identified as possible unconventional hydrocarbon reservoirs all over the world. They provide examples all over the world, like Bach Ho in Vietnam, Renqiu in China, and La Paz in Venezuela, that have shown basement fractures and weathering can hold significant production when structural and geochemical conditions are favorable. Within this international setting, the Gulf of Suez Basin is one of the most promising provinces in Egypt to explore the basement. Its tectonic regime pertaining to rifting has formed fractured metamorphic and granitic basement highs charged with overlying Nubian and Miocene source rocks topped by thick evaporites. A recent geophysical and petrophysical investigation of the Rabeh East oil field in the southern Gulf of Suez exemplifies this prospectivity. Seismic interpretation revealed fault-controlled basement traps, and well RE-25 hit an interval of 11% porosity and excellent water saturation (60%), and in the process, proved fractured/weathered granite as a viable reservoir. They highlight basement play in Egypt as significant on an international scale and demand high-resolution imaging, fracture modeling, and horizontal drilling to unlock its resources. The Gulf of Suez is thus a natural laboratory for international geoscientists investigating unconventional basement reservoirs.