Eni has signed a major reconnaissance permit agreement with Sierra Leone's Petroleum Directorate (PDSL), securing access to five offshore blocks—G-113, G-129, G-130, G-131, and G-132—covering approximately 6790 square kilometres. This rapid move by the Italian major has drawn significant industry attention, signaling a renewed focus on Sierra Leone's exploration potential, a West African nation yet to record a commercial hydrocarbon discovery.

Catalyst for Renewed Interest

The resurgence of industry interest is largely attributed to PDSL's collaboration with TGS to reprocess legacy 3D seismic data acquired over a decade ago. This reprocessing has provided greater geological clarity, particularly highlighting a massive deepwater structure named the Vega prospect. The Vega prospect is now considered the largest identified target in Sierra Leone's waters and is speculated to be the primary attraction for Eni, with potential recoverable resources estimated at three billion barrels of oil.

Licensing Terms and Strategic Moves

Eni's reconnaissance licence is valid for two years, granting the company the right to perform technical evaluation activities. Following this period, Eni must decide whether to shoot more seismic or apply for a full exploration and production licence to proceed with drilling. The swift government approval of Eni's application is notable, facilitated by the PDSL director general's direct access to the President, which underscores a commitment to attracting investment and streamlining bureaucratic processes.

Industry Implications and Expert Perspectives

Eni's entry is viewed as a powerful endorsement of Sierra Leone's evolving oil and gas sector and is expected to prompt supermajors and other companies to re-examine the region's data. Experts suggest that Eni's successful exploration track record in neighbouring Ivory Coast, with discoveries like Baleine and Calao, positions it well to unlock Sierra Leone's potential. The Vega prospect, located in water depths of 3400 metres, has been described by veteran explorers as a high-potential target with strong technical indicators, though a 2017 study estimated a 14% chance of success for a prospective resource of 507 million barrels.

Future Plans and Sector Development

PDSL is actively working to de-risk the basin further, with plans to acquire new 3D seismic data covering up to 7000 square kilometres in areas surrounding Eni's blocks and towards Liberia. The regulator aims to secure financial underwriting for this project, potentially with government and TGS involvement, and hopes to announce progress by year-end. The goal is to capitalize on the growing interest in West African frontier plays, evidenced by recent entries of majors like ExxonMobil and TotalEnergies into neighbouring countries.

Current Landscape and Ambitions

Currently, Eni and FA Oil are the only active companies in Sierra Leone. FA Oil recently completed a 3D seismic survey in its blocks and is seeking a farm-out agreement. PDSL is also in discussions with other independents, including US and Nigerian companies, with the ambition of attracting three or four additional companies by the first quarter of 2026. The director general is pushing for an exploration well to be drilled on the Vega prospect by 2026, aiming to position Sierra Leone as a significant emerging petroleum frontier in West Africa.

This material is an AI-assisted summary based on publicly available sources and may contain inaccuracies. For the original and full details, please refer to the source link. Based on materials by Iain Esau. All rights to the original text and images remain with their respective rights holders.