Ebok field operator Afren expects the central fault block extension platform to be installed in early 2014, and the partners will target additional reservoirs in this area. They are considering further options for the north fault block (NFB), which could mean drilling development wells from an extended WFB platform, with production achieved through Ebok’s existing mobile offshore production unit.
Production from the shallow-water Ebok field offshore Nigeria has averaged more than 35,100 b/d of oil, boosted by three new development wells.
Two were drilled in the NFB and one in the west fault block (WFB). A water injector well to spud soon will is designed to optimize and support the existing NFB producers.
Following completion of an ocean bottom cable 3D seismic program over the whole Ebok/Okwok/OML 115 license, Afren has firm plans for a first exploratory well early next year on the Ufon structure. The GSF Monitor will drill this potential 65-MMbbl prospect, which Afren says is structurally and geologically analogous to Ebok and Okwok.
Elsewhere off Nigeria, the OML 113 partners are considering drilling and early production on the Aje field, and there may be development synergies with the Ogo discovery in OPL 310, Afren adds.
In the Tanga block offshore Tanzania, Afren is interpreting final processed data from a 620-sq km (239-sq mi) 3D seismic survey. Simultaneously, the company and its partners are working up the shallow-water Chungwa-1 prospect and the deeper-water Mkonge-1.
They are lining up a rig to drill two wells, starting with Chungwa-1 early next year. This will test Tertiary, Cretaceous, and Jurassic reservoirs, targeting P50 oil resources of 210 MMbbl.
Gross production at the Ebok field was 35,102 bopd during the period to 30th September 2013, representing a year-on-year increase of 22 per cent.
During the period the Partners successfully drilled three production wells at the field, two from the North Fault Block (NFB) and one from the West Fault Block (WFB); the wells are producing at an average rate of approximately 3,925 bopd. A water injector well will be spudded shortly to optimise and support the existing producing wells on the North Fault Block.
The company’s development strategy is to systematically bring each proven area of the Ebok field onstream and, through ongoing drilling, continue to increase the reserves base from the field over the coming months and years. It plans for the MOPU and FSO to become a central facility, not just for the immediately surrounding Ebok structure, but also for the broader Ebok/Okwok/OML 115 area. This will facilitate the economical and rapid tie-back of production from potential future developments on the acreage.
The Central Fault Block Extension platform is expected to be installed in early 2014, and will target additional reservoirs in the Central Fault Block. The Partners are looking at development options for the NFB, which would likely involve the drilling of development wells from an extended WFB platform and with production achieved through to the existing MOPU.