Ann: Mbelele-2 results point to prolific new helium province, page-299

"One liter of liquid helium expands to 750 liters of helium gas under normal or also called standard conditions (1 bar, room temperature), when going through the boiling point of 4.2 K."

Again not applicable as it won't get cold enough to be in liquid firm underground.

But big expansion when going from liquid to gaseous form hence why transported in iso containers in liquid helium form

Anyway that expansion factor stated above is at standard conditions. Helium gas in the saturated zone would be under different conditions and mixed in liquids?