Ingomar
Ingomar Dome is Helix’s exploration project in Rosebud County, Montana, and offers longer-term helium and hydrogen upside alongside the Company’s producing and liquefaction assets.
The Ingomar Dome has all the characteristics of a potentially massive Flathead-style helium discovery, including:
- Large Scale: Closure of 16,512 acres with P50 Gross Unrisked Prospective Resources of 2.3Bcf
- Thick sediment: Reservoir sandstones with proven sealing units in multiple horizons
- Adjacent to major structure: Located on the upthrown side of the deep-seated Sumatra Thrust, which acts as a conduit for helium migration
- Great Economics: NPV8 of $304m with iCAPEX of only $19m calculated on assumed helium grade of 1.5%
- Helium Upside: Presence of 2.5% helium within Flathead Formation improves economics
- Hydrogen: First large-scale hydrogen discovery in the USA. Multiple shows of hydrogen, with 55% gas-in-mud within the Flathead formation.
Clink #1
- First helium exploration well on the Ingomar Dome structure testing stacked reservoir potential in the Flathead, Charles and Amsden formations
- Drilled Q3 2024 to an extended Total Depth of 8,550ft
- Gas sample tested 2.5% helium, demonstrating significant helium potential with the highest helium grade in Montana
- 55.2% hydrogen in gas sample isolated from drilling mud could represent the first large scale geological hydrogen discovery in the United States.
- Additional stimulation required to overcome potential mud induced near-wellbore formation damage generate commercial flow rates
Helix completed acidisation of the Charles Formation at Clink #1 in early 2025 and recovered gas for analysis. Helix continues to evaluate next steps at Ingomar while prioritising Rudyard expansion and Keyes.