Enhancing seismic data to identify offshore potential
Developing exploration data
SIERRA LEONE: Seismic data from offshore Sierra Leone is to be enhanced to offer clearer subsurface insights for oil and gas companies exploring the area.
With growing interest from international oil companies (IOCs) and independents, the Fusion 3D data comes at a crucial time. The Vega prospect has been identified as a promising target within Sierra Leone's offshore waters, and modern depth data will be instrumental in further mapping the undrilled prospect, enabling progress toward drilling activities.
“Sierra Leone has all the geological ingredients to emerge as a leading exploration frontier in Africa. With accessible acreage, attractive fiscal terms, and this depth-migrated high-quality Fusion 3D data, the exploration potential is strong,” said David Hajovsky, Executive Vice President of Multi-Client at TGS.
“This initiative will promote investment and reinforce Sierra Leone's standing as an emerging player in the global energy market, working closely with PDSL (Petroleum Directorate of Sierra Leone) and other stakeholders to maximize the benefits of this initiative for all parties involved.”
To date, eight wells have been drilled on the continental slope region of Sierra Leone, targeting submarine fan systems that demonstrate reservoir quality at multiple stratigraphic levels. The region holds unexplored opportunities in several basin-floor fans in the northern Sierra Leone Basin, where transpressional events created a syn-rift plateau with attractive drilling depth to target.
Building on the success of TGS’s multi-client portfolio for Sierra Leone, this reprocessing project includes approximately 7,500 square kilometres of 3D seismic data, complemented by 16,000 line kilometres of 2D Pre-Stack Depth Migrated (PSDM) data, and supported by gravity, magnetic, and interpretive data products.
This project, supported by industry funding, is expected to deliver final results in Q3 2025.
PHOTO SOURCE: TGS - Map depicting TGS multi-client subsurface data coverage, including 2D and 3D seismic, offshore Sierra Leone.
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