Namibia: NABIRM concludes seismic interpretation of Block 2113A, Walvis Basin, offshore Namibia
11 Nov 2015
NABIRM, the Atlantic margins focused oil and gas exploration company, has announced that in conjunction with its partner NAMCOR (10%) it has concluded the interpretation of a 2D Seismic Survey on Block 2113A located in the Walvis Basin, offshore Namibia, by U.S based ION Geophysics. The license block covers 5,750 km 2 , with 3,600 km 2 located offshore and 2,150 km 2 located onshore.
BGP International using the vessel M/V BGP Pioneer acquired the survey; earlier in 2015 the same vessel completed the Ion Geophysical NamibiaSPAN 2D survey in offshore. The M/V BGP Pioneer acquired 684 line kilometers of 2D seismic data plus ship borne gravity and magnetic data within Block 2113A. The survey was acquired with a single 9-kilometer cable towed 8 meters below the sea surface. Acquisition was completed on 20 March 2015. Parallel Geoscience processed the 2D seismic data in April and May of 2015. Ion Geophysical was contracted to perform the 2D seismic interpretation and received/loaded the processed 2D dataset into SMT/Kingdom on 6 July 2015, the final reports were published on the 4th of November 2015.
The objective of the seismic interpretation was to identify key depositional features (reflection types, continuity, terminations, downlap, toplap, onlap), structural features (highs, lows, faults and fault styles including normal, reverse, strike-slip) and anomalous reflection packages. The most significant surface within the dataset is a strong reflector at the top of a thick succession of low frequency reflectors. Utilizing the NamibiaSPAN 2D data, these horizons were correlated into Block 2113A. In addition to these regional horizons, local surfaces were identified from the PEL 58 2D Seismic Survey exploration grid and are described as Surface 1, Surface 2, Surface 3 and Basement. Time structure maps, depth structure maps, isochrons and isopachs have been generated for these key horizons.
Further, ION mapped six leads with total Pmean unrisked recoverable resources of over 520 MMBO. Stratigraphic lead designated ‘Ondo’ is the largest and of principal interest, with a Pmean of around 230 MMBO – ‘Ekiti’ is slightly smaller and exceeds 200 MMBO.
Olayinka Arowolo, Chief Executive Officer of Nabirm, the Operator of the Block commented:
'ION’s interpretation of Nabirm’s data; the established oil kitchen in the Walvis Basin confirming light 40 API degrees gravity oil; the oil shows onshore on Eco Atlantic’s Daniel Block which prompted the drilling of the Toscanini Well; and the slicks evident in the region from the Fugro Oil Slick study that was completed for Eco Atlantic, all indicate that Exploration in blocks adjacent to PEL 58 identify an 'oil mature fairway'.
'Hydrocarbons generated within this fairway would be migrating eastward and updip toward Block 2113A. In onshore blocks, exploration is focused on Karoo age sediments. There is a high likelihood of Karoo sediments in Block 2113A. The Lower Cretaceous Twyfelfonte in Sandstone has been mapped exrensively onshore and likely extends into the offshore area. The Twyfelfontein Formation - Verbrande/Tsarabis/Huab Formations would be key reservoir - source rock components of a viable Petroleum System within Block 2113A. We still have significant work to do and further study is required, with shallow water depths and shallow drilling depths, we are intrigued by this very interesting Block.'
Note: NABIRM is currently offering Block 2113A for farmout. For further information, see the Moyes & Co web site