Tullow Oil completed drilling operations on the first phase of its Jubilee development project offshore Ghana during the first quarter of this year, and remains on track to deliver first oil from Jubilee in November of December of this year.
The field's floating production, storage and offloading vessel (FPSO) Kwame Nkrumah, arrived last month from Singapore and is now moored on station above the Jubilee field.
Subsea equipment installation is largely complete with the exception of the risers, which will be tied into the FPSO in July and August. The FPSO and subsea system will then be integrated, commissioned and tested in advance of first oil production.
Tullow used the Eirik Raude, an ultra-deepwater semisub, for the first phase wells. Difficulties were encountered in the first completion due to a downhole mechanical failure resulting in the need to workover the well. Time lost during these operations will be recovered by utilizing the Sedco 702, a deepwater semisub, in parallel with the Eirik Raude.
Production capacity at start-up is expected to be approximately 60,000 b/d of oil and will ramp up to 120,000 b/d over the following three to six months. The cost for the Phase 1 development is forecast at approximately US$3.35 billion, within 10 percent of the original US$3.15 billion budget.
Work is well advanced on further development phases, which will extend the field production plateau and ensure optimization of field reserves. Following the initial Phase 1 development, Phase 1a will involve five to eight infill wells tied into existing infrastructure. Phase 1b may involve up to 20 additional wells and is likely to require expansion of the subsea infrastructure.
The timing of these additional development phases will depend on the performance of the Phase 1 wells and the FPSO vessel but sanction is likely within the next one to two years.
This latest work reaffirms the resource guidance for the Jubilee Unit Area of 500 (P90) 700 (P50) 1,000 (P10) million bbls.
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