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Helium exploration often begins far below the surface, where ancient rocks, faults and trapped gas pockets determine whether a project can move from maps to a working well. In northern Montana, REV Exploration Corp. (TSXV: REVX) is using a newly completed high-resolution 3D seismic survey to sharpen its view of the subsurface at its West Butte Helium Project in Toole County. The company says the data has improved the definition of structural geometry, fault architecture and reservoir positions, which in turn helps identify drilling locations with the best chance of success. This step matters because helium accumulations depend on specific geological conditions that are difficult to confirm without detailed imaging.
The geology at West Butte centers on multiple prospective reservoir horizons stacked vertically within the same structural setting. Interpreted targets include Devonian Beaverhill Lake intervals and deeper Cambrian Basal Sandstone units that lie directly on the Precambrian basement complex. In plain terms, these are porous rock layers at different depths that can hold gas, sitting above very old basement rocks that often act as a foundation for trapping systems. The presence of several stacked targets is important because a single wellbore can test more than one reservoir interval, increasing the amount of geology evaluated per drill hole.
A key concept in helium exploration is structural closure, which refers to a configuration of rock layers and faults that can trap migrating gas and prevent it from escaping. The 3D seismic dataset allows interpreters to map these closures and the fault networks that may have served as migration pathways for helium-bearing fluids over geological time. Fault-controlled migration is a common element in conventional helium systems, where gas moves along fractures and is eventually caught in porous reservoirs capped by tighter rocks. By clarifying where closures and faults intersect prospective reservoirs, the seismic work reduces uncertainty about where to place a drill bit.
The regional context adds weight to the play concept. The Northern Great Plains Helium Fairway, which extends from southern Alberta through REV’s Aden Dome Helium prospect and into northern Montana, has historically hosted helium pools with commercially significant concentrations and strong flow rates in Devonian and Cambrian reservoirs. While results elsewhere do not guarantee outcomes at West Butte, the existence of helium-bearing Basal Sand and related reservoirs in the fairway provides technical support for the geological model being tested. This fairway framing helps explain why companies are focusing exploration efforts along this corridor rather than in entirely new basins.
Market timing is another factor in the background. Helium supply has been tight in recent years, which raises the potential value of new discoveries that can reach production. REV’s chief executive, Jordan Potts, noted that the same technical team responsible for MAX Power Mining Corp.’s (CSE: MAXX) successful exploration program in Saskatchewan, which led to the Lawson discovery of natural hydrogen and helium, is handling interpretation and execution at West Butte. The company also points to underexplored natural hydrogen potential in the same Montana corridor, suggesting that the infrastructure and geological knowledge developed for helium could support broader gas exploration over time.
With seismic acquisition complete and interpretation well advanced, the program is moving from geophysical analysis to the drilling phase. REV is finalizing drill target selection and expects to advance chosen locations into Montana’s well-licensing process. The objective is to pick sites that offer the strongest combination of structural closure, stratigraphic position and stacked reservoir potential, then test the West Butte helium system directly with modern gas monitoring equipment. Near-term updates are expected on final target choice, licensing status and drilling plans as the project transitions toward its first wells.
3D seismic can be thought of as a detailed subsurface map created by sending sound waves into the ground and recording how they bounce back from different rock layers. Compared to older 2D lines, 3D surveys provide a volumetric view that reveals the shape of structures, the continuity of reservoirs and the relationships between faults and traps. This level of detail is especially valuable in helium, where accumulations are often subtle and depend on precise alignments of geology that are hard to infer from surface data or sparse well control.
REV’s broader portfolio includes oil and gas leasehold interests in Montana covering approximately 16,000 acres, along with PNG leases in Alberta near the border, including the drill-ready Aden Dome Project. The company also holds equity positions in MAX Power and in Major Gold Corp., a private company pursuing a TSX Venture listing. West Butte fits into this mix as a cornerstone helium asset where the next material de-risking step is drilling and testing, rather than further geophysical work.
