ADX Energy wins third-party backing for giant Sicily gas target

ENI's Argo-Cassiopea gas development in the Sicily Channel lies near ADX Energy's exploration permit, where an independent RISC review has strengthened confidence in the project's geology and pathway to drilling.

ADX Energy (ASX: ADX) has received a significant technical endorsement for its 100 per cent-owned Sicily Channel gas project offshore Italy after an independent review validated the company's geological model, resource assumptions and estimation methodology.

The review by respected consultancy RISC Advisory effectively de-risks one of the company's most strategically important long-term growth assets. The key takeaway is not a change in resource numbers. Instead, it gives investors greater confidence the company is on the right path to unlocking a significant new source of gas for Europe.

While ADX builds out its cash-flowing Austrian production base, the Sicily project has quietly matured into the company's "Mediterranean wildcard".

The permit already holds a previously reported unrisked mean prospective resource of 619 billion cubic feet of gas (Bcf), with a high-case P10 estimate of a whopping 1.265 trillion cubic feet of gas (Tcf). The independent review strengthens confidence in the geological model underpinning those estimates.

According to management, ADX has spent years integrating historical seismic with nearby well data, refining its geological interpretation and identifying eight exploration targets to build what it believes is a large, overlooked gas opportunity.

Historical drilling by ENI and Shell on ADX's permit had already demonstrated its gas potential, with the Nilde-2 well encountering high-quality natural gas in shallower horizons. Offset wells surrounding the permit also frequently recorded elevated mud gas shows in the target sandstones, providing further evidence the play is gas-bearing.

RISC's review concluded the Miocene-aged Terravecchia Formation, the sandstone reservoir targeted by ADX's exploration program, represents a valid biogenic gas play. The interpretation is consistent with ADX's assessment of the regional geology and historical drilling.

Crucially, RISC endorsed ADX's methodology for calculating prospective resources, confirming both the company's resource estimation approach and the lead and prospect areas selected for future exploration were reasonable.

In a further vote of confidence, the consultancy suggested that logging data from nearby wells could even support using a greater net reservoir thickness for the project's high-case resource scenario than ADX had previously assumed, potentially pointing to further upside.

The independent review conducted by RISC concurs with our planned work program to unlock the Permit’s potential. RISC’s assessment further highlights the importance of historic seismic and drilling data for identifying and derisking the potential of overlooked exploration opportunities.   ADX Energy Executive Chairman Ian Tchacos

The technical validation also strengthens ADX's planned exploration program, which includes acquiring modern 3D seismic data and applying direct hydrocarbon indicator (DHI) techniques to better identify gas-bearing reservoirs and refine drill targets.

With the independent review complete and ADX adopting its recommendations, the focus now shifts to the next phase. Modern 3D seismic will refine the growing target portfolio before the company selects the most prospective sites for its first exploration wells.

ADX also plans ongoing independent technical assessments as the permit advances towards drilling.

Beyond the geology, the review also reinforces the project's commercial appeal.

The permit sits within one of the Mediterranean's best-established hydrocarbon fairways alongside ENI's Argo-Cassiopea development, which entered production in 2024, and the nearby Lippone-Mazara gas field. Together, they demonstrate the established producing gas province surrounding ADX's permit.

It also sits adjacent to the Transmed gas pipeline, providing a direct route into European markets. Unlike many offshore discoveries requiring new export infrastructure, any commercial find would already be close to pipelines and demand centres, offering a clearer path to commercialisation.

With Europe continuing to prioritise secure domestic energy supplies, Italian gas discoveries carry strategic weight beyond their size.

Taken together, the independent review, upcoming seismic program and ongoing technical assessments mark another deliberate step in ADX's methodical de-risking of the project.

For ADX, the question is no longer whether the geology works. It is where to drill first.

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