Geisum

Geisum Oil Field Profile

Location

The Geisum Oil Field is located offshore in the Gulf of Suez, Egypt, specifically in the southwestern entrance of the Gulf, about 80 km northwest of Hurghada city. The field is situated in a shallow water archipelago.

Ownership and Operatorship

The Geisum and Tawila West Concession, which includes the Geisum Oil Field, is operated by PetroGulf Misr Joint Operating Company. The ownership is shared between:

• Cheiron (through its PICO GOS affiliate) with a 60% working interest and operatorship.
• Kuwait Foreign Petroleum Exploration Company (KUFPEC) with a 40% interest.

Discovery and Development History

• Discovery Year: The Geisum Oil Field was discovered in 1982.
• Production Start: Oil production began in 1985.
• Early Development: Initially, the field was developed by a joint venture between EGPC and Conoco from 1985 to 1987. After Conoco assigned its interest to EGPC, the field continued to be developed by EGPC. In 1988-1990, several development wells were drilled in the South Geisum field.
• Further Development: In the 1990s, the development expanded to the North Geisum field, with the discovery of the Basal Rahmi Sand as a new Miocene reservoir unit in 1991. Extensive drilling campaigns and seismic surveys were conducted in the late 1990s and early 2000s to further develop the field.
• Recent Developments: In 2019, the GNN oil discovery was made northeast of the Geisum field, which has been a significant addition to the concession. The GNN-11 exploration well, drilled in 2023, discovered oil in the Pre-Miocene Nubia formation for the first time in the GNN area.

Reservoirs and Geology

• Main Reservoirs:
  • South Geisum: Thebes Carbonate, Cretaceous sand, and fractured Basement are the main reservoirs.
  • North Geisum and Tawila West: Miocene sand is the primary reservoir.
  • GNN Field: The producing reservoir in the main GNN field is in the Nukhul formation. The GNN-11 well discovered oil in the Pre-Miocene Nubia formation.

Production

• Current Production: Following the successful drilling campaign, including the GNN-11 well, the gross oil production from the concession has increased to 23,000 barrels of oil per day (bopd), up from 4,000 bopd before the GNN field was developed.
• Historical Production: The field has been producing since the 1980s, with significant production levels. For example, in 2020, the oil production was approximately 1.79 million barrels per year.

Infrastructure

• Early Production Facility (EPF): The GNN-11 well was drilled from the recently installed GNN EPF, which includes a conductor support platform, a mobile offshore production unit, and a 10-inch oil export pipeline tied back to the existing Geisum Star production complex.
• Geisum Facilities: The full field development of the GNN field will utilize the existing Geisum facilities and involve the installation of new platform and pipeline infrastructure.

Exploration Potential

• The discovery of oil in the Nubia formation by the GNN-11 well highlights the significant remaining exploration potential in the concession area, despite the Gulf of Suez being a relatively mature hydrocarbon province. Further exploration wells are planned to be drilled in the concession area.

Reserves

• As of 2021, the remaining recoverable reserves for the Geisum Oil Field are estimated at approximately 17.98 million barrels of crude oil and condensate.

Drilling and Seismic Activities

• Extensive seismic surveys, including 2-D and 3-D seismic surveys, have been conducted over the years to support the development and exploration activities in the field. These surveys have been crucial in identifying prospective areas and optimizing drilling locations.