I just read an ABC (Oz) News article by an analytical journalist who says that the Venezuelan oil is not likely to be as lucrative as expected, so probably not worth the whole invasion exercise.

Has Trump landed a dud with his Venezuelan oil play?

By chief business correspondent Ian Verrender

My summary: The price of oil has plummeted, oil is less likely to be needed to the same extent as now when renewable power becomes more available and less oil based fuel is used for vehicles, and the oil from Venezuela needs a lot more processing than oil from most other areas so its price is usually lower to account for the extra processing costs.