Tullow devising long-term plan for Jubilee offshore Ghana

Tullow expects to complete drilling of the remaining three Jubilee field Phase 1A production and water injection wells over the next 12 months.

Offshore staff

LONDON – Tullow expects to complete drilling of the remaining three Jubilee field Phase 1A production and water injection wells over the next 12 months.

Talks continue with Ghana’s government on the full-field development plan to detail how Jubilee will be developed in future to maximize recovery and to maintain production at peak capacity.

A recently failed water injection pump on the FPSO will be replaced before year-end. The extended maintenance shutdown required will impact production, now likely to average around 95,000 b/d over the entire year.

In Ghana’s Deepwater Tano block, Tullow now estimates the overall cost of theTweneboa/Enyenra/Ntomme (TEN) development at $4.9 billion, excluding FPSO lease costs. The increase is in part due to an expansion of the scope to enhance recovery from Ntomme and facilitate gas export.

Drilling is complete at the Enyenra-6A and Ntomme-4A (Nt-04) water injection wells to better determine oil/water contacts in each field.

Earlier this year, Enyenra-6A, drilled initially as an appraisal well, encountered 18 m (59 ft) of oil pay, indicating a deeper than expected oil/water contact. The Nt-04 well also indicates a slightly deeper oil/water contact and good reservoir development, supporting the decision to add water injection to the Ntomme development.

An injectivity test is under way at Nt-04 to confirm lateral connectivity of the target reservoirs. The wells will both be suspended for future use in the TEN development.

Additionally, a 3D seismic survey should be completed over the TEN and nearbyWawa fields by the end of 1Q 2014.

Elsewhere inWest Africa, Tullow expects to start a four-well exploration campaign offshore Mauritania at the end of August. This is designed to test new deeper stratigraphic plays in the offshore Mauritanian basin. The drillship Stena Drill Max will first drill the Frégate well in the C-7 license.

Following the declaration of commerciality for the offshoreBanda field last November, the partners have approval from Mauritania’s government for a development plan that would supply gas from Banda to a new local power station. They aim to sanction the project by the end of this year.

Offshore Côte d’Ivoire, drilling of the Paon-2A appraisal well is expected to start this fall.

7/31/2013

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