Project Profile
Value: Undisclosed
Location: OML 67, 15km East of the Afren/Oriental owned Ebok development, offshore Nigeria
Reserves: 51.8 mmbbls
Water Depth: 132 feet
Start-up year:
In 2001, ExxonMobil contributed the Okwok field to Nigeria’s Marginal Field Program, which was established by the Nigerian government to encourage greater indigenous participation in the oil and gas sector. Pursuant to this program, Oriental completed a farm-in agreement for Okwok with Mobil and the Nigerian National Petroleum Corporation (NNPC) in June 2006. Addax subsequently entered into a Joint Venture Agreement (JVA) with Oriental, acquiring a 40% interest in Okwok and assumed the role of Technical Advisor. In August 2009 Afren extended its indigenous partnership in Nigeria with Oriental and formed its first Nigerian partnership with Addax, having agreed to farm-in to and jointly develop the Okwok field. Okwok is an undeveloped oil field located in OML 67, 50 km offshore in 132 ft of water and 15 km East of the Afren/Oriental owned Ebok development. The field was discovered by the ExxonMobil/NNPC JV in 1967 (Okwok-1), and two subsequent appraisal wells were drilled in 1968 (Okwok-2 and Okwok-3) but not production tested. The wells encountered oil in the LD1 and D2 series of reservoirs (also proved to be oil bearing and under development at the Ebok field) with over 100 ft of oil pay logged in the Okwok-2 well at the D2 level plus multiple 50 ft oil bearing sections in the LD1 in the Okwok-1 and Okwok-2 wells.
The Okwok-9 appraisal well was spudded during August 2010, and reached a total measured depth of 8,083 ft. The well was completed over a 35 ft interval of good quality D2 reservoir with average porosity of 30%, and flowed 31° API crude oil. The well was flowed for 48 hours and shut in for a 54 hour build-up. The 48 hour flow test was designed to establish a connected reservoir volume, and also to quantify reservoir permeability and heterogeneity. Analysis of the log and test data acquired from the Okwok-9 well, and together with the seismic data, indicated that the primary objective of establishing the minimum economic field size in order to commercially develop the Okwok field, estimated by management at 25 million barrels, was fulfilled. Furthermore, information obtained from the well is consistent with, and supports, our subsurface model for the field. The group completed an Ocean Bottom Cable 3D seismic survey over the whole Ebok/ Okwok/OML 115 area in November 2011, acquiring in total 348 km2 of new, high quality data. Processing of the new data is under way and expected to be completed by the second quarter of 2012. One of the primary purposes of the new data is to assist in development planning for the Okwok field, alongside determining the optimal placement of one further appraisal well. riental intend to drill one further appraisal well at the Okwok field during the second half of 2012, ahead of formal submission of a Field Development Plan to the Nigerian authorities.
Operators:
Oriental Energy: Operator with 88% interest
Addax: 12% interest
Contractors:
Sea Trucks Group: Installation contract and comprises the following subsea installation work:
- Installation of 60 km pipeline, PLEM, flexible riser and spool pieces as well as transportation and installation of jacket, piles, bridges and topside, ranging between 240 t and 480 t.
- Sea Trucks will use two of its DP3 pipelay construction vessels to undertake the work. A number of the Group’s marine support vessels and barges will also be deployed in the project.