Incident Overview
On 24 October 2026, Borr Drilling’s 2014‑built jackup rig Prospector 5 capsized and sank in offshore waters near Mayumba, Gabon. The accident occurred at approximately 20:37 local time while the unit was jacking up for a scheduled drilling campaign on BW Energy’s MaBoMo Phase 2 programme.
Cause and Immediate Consequences
Preliminary information from Borr indicates a "punch‑through" during preload operations, which compromised the rig’s stability and led to the rapid sinking. The vessel carried 115 personnel; 110 have been confirmed safe. Five crew members remain unaccounted for, with reports of one confirmed fatality and four others missing, including three Gabonese nationals and an expatriate.
Search and Rescue Operations
Gabonese authorities have mobilised naval patrol boats, helicopters, and a dedicated search‑and‑rescue team. The Republic of Congo has also dispatched naval assets to assist. Plans are under way to deploy remotely operated underwater vehicles (ROVs) to inspect the wreck and aid recovery efforts.
Impact on BW Energy’s MaBoMo Facility
The sinking forced an immediate shutdown of the MaBoMo production platform under standard safety protocols. BW Energy confirmed that the offshore processing facilities and associated equipment remain intact, with no accidental discharge of hydrocarbons or other pollutants.
Projected Production Losses
- MaBoMo Phase 2 was slated to add up to 20,000 barrels per day of gross output at peak.
- First oil from the four planned wells on the Hibiscus and Hibiscus South fields had been targeted for Q1 2027.
- The suspension will delay these targets and could affect contractual deliveries.
Environmental Monitoring
Gabonese environmental agencies report no visible pollution in the surrounding sea and are maintaining heightened surveillance near Mayumba National Park. Continuous water quality monitoring will be conducted throughout the investigation.
Investigation and Future Outlook
A joint technical investigation involving Borr Drilling, BW Energy, and Gabonese authorities has been launched to determine the exact sequence of events leading to the punch‑through and subsequent sinking. Borr CEO Bruno Morand emphasized the company’s priority is supporting the families of the missing crew and cooperating fully with rescue and investigative teams.
Prospector 5 had secured a minimum 320‑day contract in April, with optional extensions for an additional 220 days. BW Energy holds a 73.5 % stake in the Dussafu license, alongside Panoro Energy (17.5 %) and Gabon Oil Company (9 %). The outcome of the investigation will shape the future of the contract and the broader development schedule for the MaBoMo field.
Conclusion
The sinking of Prospector 5 underscores the operational risks inherent in offshore drilling and highlights the importance of robust safety and emergency response frameworks. The maritime community will be closely monitoring the rescue efforts, environmental safeguards, and the eventual resumption of production activities in the region.