RE: PRD Website28 Apr 2026 14:57
From Perplexity: While methane is a very common carrier gas for helium, it is not the only one.
Helium migration and accumulation can be facilitated by several different "carrier" fluids, including nitrogen (
N
2
N
2
), carbon dioxide (
C
O
2
CO
2
), or even water in certain subsurface conditions.
Why helium can flow without methane
Carrier alternatives: If a reservoir lacks methane but is rich in nitrogen or
C
O
2
CO
2
, those gases can act as the "transport vehicle" that brings helium into a trap.
Free gas phase: Helium itself can exist as a free-gas phase if the conditions allow it to exsolve from groundwater or migrate through faults.
Geological history: Even if a reservoir appears to have no methane now, the presence of helium suggests a carrier fluid was likely involved in the past to move it there. Sometimes the original carrier gas (like
C
O
2
CO
2
) reacts with the surrounding rock and disappears over time, leaving behind a concentrated "helium-rich" gas pool.
The practical risk at MOU-5
While the physics allows for helium to flow without methane, the absence of a known, abundant carrier gas is a major uncertainty for any project.
If a well encounters only trace amounts of gas, it may indicate:
Low Charge: There isn’t enough helium or carrier gas in the system to create a commercial accumulation.
Poor Seal: The helium may have leaked out over millions of years because the trap wasn't perfectly sealed.
Disconnected Reservoir: The well might have hit a small, isolated pocket of gas that isn't connected to a larger, productive reservoir.
In short, methane is not a mandatory ingredient for helium to "flow," but if you find helium without any carrier gas, it is much harder to prove that the reservoir is large enough or productive enough to be commercial. Without a significant volume of gas to act as a vehicle, you typically cannot sustain a commercial flow rate
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