Dussafu, Gabon

Dussafu, performance beyond expectation

The Dussafu license is situated within the Ruche Exclusive Exploitation Area (Ruche EEA), which covers 850 km2 and includes six discovered oil fields and numerous leads and prospects. The average water depth is 116 metres. The Production Sharing Contract allows for production of hydrocarbons from the Ruche EEA for up to 20 years from first production, which was achieved in September 2018.

Fields on the Dussafu block produce to the BW Adolo FPSO adjacent to the Tortue Field. Phase 1 of the Dussafu development included two subsea horizontal production wells at the Tortue Field. Production is aided by gas lift as the artificial lift mechanism. Tortue Phase 2 introduced four additional subsea production wells at Tortue Field as part of continued Dussafu development. The Hibiscus / Ruche development project in the Hibiscus and Ruche Fields is planned to initially drill up to six horizontal production wells, all targeting the Gamba reservoir.

In 2023, Hibiscus field was brought on production through four new wells to the MaBoMo facility. While reservoir performance exceeded expectations, the wells were impacted by challenges related to the Electrical Submersible Pumps (ESPs) toward the end of the year. Hibiscus field uptime was 97%, including scheduleddowntime. Production from the MaBoMo facility is transported tothe BW Adolo FPSO through a 20 km pipeline.

Dussafu averaged a gross rate of approximately 17,100 barrels per day in 2023. Approximately 6.3 million barrels gross were produced in the year. Production at Dussafu peaked at an all-time high of 40,000 barrels of oil per day,reaching the nameplate capacity of the BW Adolo FPSO.

Another three development wells are planned for 2024 to complete the first phase of Hibiscus / Ruche development, bringing the planned development well count to 13 in the overall Dussafu licence. Gross reserves for this phase are approximately 52.6 million barrels based on third-party estimates.

An appraisal well was drilled at the Hibiscus South prospect and encountered commercial volumes of oil. A development well utilising the top of the appraisal wellbore has been added to the development plan.

At Tortue field, gas lift capacity was increased from four to 12 MMSCF/D in third quarter, increasing production by approximately 3,000 barrels per day initially. Tortue field uptime was 91%, including scheduled downtime.

BW Energy Gabon SA hold 73.5% operated interest in the Dussafu licence while Panoro Energy and Gabon Oil Company hold 17.5% and 9% interest, respectively.

Ownership
BW Energy Gabon SA's operated ownership interest in the Dussafu license is 73.5%, Panoro Energy ownership is 17.5% and Gabon Oil Company’s ownership interest is 9%.
Tullow Oil completed the sale of its 10% ownership interest in the Dussafu Marin permit to Panoro Energy ASA in June 2021.