Petrophysical Evaluation and Hydrocarbon Potentials of the Belayim Formation of Middle Miocene Successions in Tawilla West Oilfield, Gulf of Suez, Egypt.

Mohamed Hashem, Mohamed Ewais; Othman, Adel Ali.A.; Mohamed, Mohamed Fathy

doi:10.21608/egjg.2024.317688.1089

Petrophysical Evaluation and Hydrocarbon Potentials of the Belayim Formation of Middle Miocene Successions in Tawilla West Oilfield, Gulf of Suez, Egypt.

Document Type : Original Article

Authors

¹ Geophysics,, faculty of science, Azhar university, Cairo, Egypt.

² Department of geology, faculty of science,al Azhar university,nasr city, Cairo, Egypt.

³ Department of Geology, Faculty of science, Al-Azhar University, Cairo, Egypt

10.21608/egjg.2024.317688.1089

Abstract

ABSTRACT
Miocene sediments have played a very important role in petroleum accumulation. The Tawilla West oilfield is one of the most productive oil fields located in the southern part of the Gulf of Suez. The examination of the petrophysical parameters of the Baba Members within the Belayim Formation aims to characterize these sands and ascertain their potential for hydrocarbon production and accumulation. This investigation is prompted by the identification of sandstone stripes in select wells within the field, attributed to the middle Miocene (Serravallian), and exhibiting a notably high resistivity signature in electric logs.These substrata lie above the productive sandstone belt of the Kareem Formation. A petrophysical analysis of these sandstone zones was carried out using electrical logs and subsurface geologic data to provide information on the key reservoir properties of the studied sandstones. Reservoir characterization of this potential reservoir shows that the net thickness of Baba Sand Unit 1 is between 12.2 m (40 feet) and 21.3 m (70 feet), and the average effective porosity is between 13% and 20%. The average water saturation is between 10% and 90%, and the average hydrocarbon saturation is between 10% and 90%. Baba Sand unit 4 has a net pay thickness between 6.1 m (20 feet) and 18.2 m (60 feet),average effective porosity between 8% and 15%, average water saturation between 30% and 80% and average hydrocarbon saturation values between 30% and 80%. The hydrocarbon saturation suggests that the Baba Sand Unit 4 sub-member contains hydrocarbons (oil and gas) in commercial quantities. Based on an analysis of the lateral and vertical distribution of petrophysical parameters and hydrocarbon reserves, an assessment of the hydrocarbon potential of the study area was conducted. The litho-saturation cross-plots were used to study and explain the lateral distribution, which was represented by isoparametric maps (total thickness, effective thickness, effective porosity, and hydrocarbon saturation). Calculations were made to assess hydrocarbon volume in the zones. The sandy intervals in Baba Unit 1 and Baba Unit 4 show potential for hydrocarbon production and storage. It is recommended to perforate the sandy sections of Baba Unit 1 and Baba Unit 4 for gas and oil production, respectively, and to reassess drill holes in the Tawilla West oilfield associated with the sandy facies.

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