BW Energy Ltd. has drilled and completed four production wells in the Dussafu Marin Permit offshore Gabon and is currently drilling additional wells, said partner Panoro Energy ASA in a Nov. 16 release.
Each drilled well was put onstream at rates of 6,000-6,500 b/d of oil. Well results have confirmed the reservoir quality in the Gamba sandstones with potential positive implications for recoverable oil volumes. Gross average third-quarter production was 23,257 bo/d and gross average fourth-quarter production is expected to be 25,000-30,000 bo/d as a period of further repair and maintenance will be undertaken over the coming weeks on the electrical systems and electrical submersible pumps.
Production well DHIBM-7H will be spud at Hibiscus field and is expected to be completed and put onstream in January. Dussafu partners also plan to return to the Hibiscus South well (DHBSM-1), about 5 km southwest of the BW Mabomo production platform, in early 2024 and reuse the upper section of the well to drill a production section into the newly discovered oil bearing zones in the Gamba reservoir. Preliminary estimates for Hibiscus South recoverable volumes are 6-7 million bbl on a gross basis (OGJ Online, Nov. 6, 2023).
In Ruche field, operations were temporarily paused on the DRM-3H production well in mid-October. After drilling to 5,351 m and encountering oil in the Gamba reservoir, it was determined that an alternative final casing design is required. Ruche Phase I development will now have only one production well instead of the previously planned two. The additional well on Hibiscus field will take the second Ruche well rig slot.
A Bourdon (Prospect B) well will be drilled in the current Bourdon prospect campaign about 7 km southeast of the BW Mabomo production platform and 14 km west of the BW Adolo FPSO in 115 m of water. It will use the eighth and final rig slot. Timing will depend on the remaining production well sequencing and arrival of additional casing materials. Bourdon has an estimated mid-case potential of 83 million bbl in place and 29 million bbl recoverable in the Gamba and Dentale formations.
The Dussafu Marin permit is in the Ruche Exclusive Exploitation Area (Ruche EEA) and covers 850 sq km and includes six discovered oil fields and numerous leads and prospects in a proven oil and gas play fairway within Southern Gabon basin. Hibiscus and Ruche fields are being developed together and tied back to the BW Adolo FPSO stationed at Tortue field.
BW Energy is operator at Dussafu Marin (73.5%) with partner Panoro Energy (17.5%) and Gabon Oil Comp. (9%).