Venezuela’s (relatively sudden) refusal to honor its treaty obligations that admit the land is owned by Guyana is obviously due to oil greed.

Guyana has almost no military, but the Venezuelan military doesn’t really have any offensive capabilities that the US cant easily deter. The US actually appears to be a stabilizing force in this case; if the US committed to non-intervention, it would make sense for Venezuela to invade immediately.

As is, the strategic balance is not in favor of Venezuela attempting to annex the land by force.