LONDON – Tullow Oil estimates capex of $4.5 billion for the development of the TEN project offshore Ghana. The plan, currently under consideration by the Ghanaian Ministry of Energy, takes in the Tweneboa, Enyenra, and Ntomme (TEN) discoveries in the Deepwater Tano block.
The capex figure includes about 23 injection and production wells, but excludes lease costs for the FPSO.
Bids have been submitted from two contractors for the FPSO, and Tullow expects a contract award soon, pending approval for the project. This will have production capacity of about 80,000 b/d, but with a flexible design that allows for future expansion via near-field tie-ins.
Subsea front-end engineering design has been completed and tenders are being evaluated.
Tullow aims for start-up from TEN within 32-36 months of government sanction.
At the Jubilee field, in the Deepwater Tano and adjoining West Cape Three Points licenses, production last year averaged 72,000 b/d, less than expected at the start of 2012, due to productivity issues in some of the wells. Acid stimulations proved to be the answer, and well productivity has been restored at a cost of $160 million.
The Jubilee Phase 1A development, approved in January 2012, involves adding five production wells and three water injectors. Two of the wells are currently producing and three are expected to come onstream by end-September.
Tullow expects average overall production from Jubilee this year to be in the 100,000-110,000 b/d range, with a year-end exit rate above 120,000 b/d. This should result from work scheduled this summer to rectify gas compression constraints on the FPSO.
The partners are drawing up a full-field development plan setting out future investment plans with a view to extending Jubilee’s production plateau.
Finally, in the West Cape Three Points license, discussions continue on further ppraisal and development plans for the Mahogany, Teak, and Akasa discoveries. In January, the discovery area associated with the Banda discovery on the license was relinquished.