Spectrum and the Direction Generale des Hydrocarbures (DGH) have started a 3D survey north of Gabon, as part of the next phase of a shallow water multi-client, seismic data acquisition campaign off the country’s coast.

Through the campaign, Spectrum intends to acquire seismic programmes in under-explored shallow water open blocks with the objective of offering the most up-to-date 3D imaging of the area.

The blocks will be awarded by the DGH through future shallow water licence rounds in order to accelerate exploration.

Data obtained in the programme is expected to facilitate immediate activity when the blocks are awarded.

Spectrum Africa Region executive vice-president Graham Mayhew said: “Large areas of shallow water Gabonese acreage remain unexplored due to the inability of 2D seismic to image structures in the pre-salt, and the lack of modern 3D data.

“Our new multi-client 3D seismic will provide oil companies with new insight into the hydrocarbon prospectivity of these open blocks.”

“Our new multi-client 3D seismic will provide oil companies with new insight into the hydrocarbon prospectivity of these open blocks.”

The company expects to acquire up to 5,500km² of long offset broadband seismic data, alongside gravity and magnetic recordings.

Last year, an 11,400km² Gabon South 3D survey was completed.

The current programme complements the more than 20,000km of 2D multi-client seismic data held by Spectrum offshore Gabon on behalf of the DGH.

To be processed with PSTM, PSDM and Broadband products, the initial set of new 3D data will be delivered in the third quarter of this year ahead of anticipated licensing rounds.

The survey is being carried out in collaboration with China Oilfield Services (COSL).