Trump is urging U.S. oil companies to return to Venezuela but question marks remain with instability, high costs, and weak oil prices.

“I don't think any large U.S. major company is going to want to invest without a series of guarantees,” one historian of Venezuela said.

Doubling Venezuela's weakened oil flows could cost $110 billion and take until 2030.

President Trump has suggested the U.S. may end up reimbursing the "tremendous amount of money" needed to be spent by oil companies to rebuild Venezuela's infrastructure.

Trump is urging U.S. oil companies to return to Venezuela but question marks remain with instability, high costs, and weak oil prices.

US faces big challenges in trying to unlock ‘tremendous wealth’ from Venezuela’s long-neglected oil industry