TGS Enhances Fusion 3D Seismic Data to Illuminate Offshore Sierra Leone Exploration Potential

TGS, a leading provider of energy data and intelligence, announced enhancements to its Fusion 3D seismic dataset offshore Sierra Leone, with a focus on the Vega prospect.

This reprocessing project utilizes advanced seismic imaging techniques to improve depth data, providing clearer subsurface insights for current and prospective oil and gas operators in the region. Recent discoveries in South America have heightened interest, positioning Sierra Leone as a promising area for exploration.

With growing interest from international oil companies and independents, the Fusion 3D data is timely. The Vega prospect, a significant target within Sierra Leone’s offshore waters, will benefit from enhanced depth data, aiding in mapping this undrilled area and facilitating progress toward drilling.

So far, eight wells have been drilled in Sierra Leone's continental slope region, targeting submarine fan systems with reservoir-quality strata at various levels. The northern Sierra Leone Basin also offers untapped potential, particularly in basin-floor fans formed by transpressional events that created a syn-rift plateau with promising drilling depth.

Building on the success of GS’s multi-client portfolio for Sierra Leone, the project reprocesses approximately 7,500 square kilometers of 3D seismic data, along with 16,000 line kilometers of 2D Pre-Stack Depth Migrated (PSDM) data, supplemented by gravity, magnetic, and interpretive data products.

“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. “TGS is committed to supporting Sierra Leone’s energy sector development, and 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.”

This project, supported by industry funding, is expected to deliver final results in Q3 2025.