This claim isn’t accurate. Oil companies haven’t walked away, they’re still in talks, just pushing for guarantees:
Trump promised Big Oil that US taxpayers would pay for infrastructure improvements to plunder Venezuelan oil:
” STATEMENT: Trump’s Meeting With Oil Executives Shows Venezuela Invasion Was About Corporate Plunder at Taxpayer Expense”
“I think we have a path forward here very shortly to be able to increase our liftings from those joint ventures 100 percent — essentially effective immediately,” he said. “We are also able to increase our production within our own disciplined investment schemes by about 50 percent just in the next 18 to 24 months, and that’s just leveraging what’s on the ground.”
But asked by Trump whether the company would be more focused on old or new infrastructure in Venezuela, he did not commit to building anything new.
“It’s a little bit of a mix, but today it’s mostly us taking the equipment of today [and] getting it to the standards that we are accustomed to. … most of the investments that we’ve been making are about getting it up to our standards,” Nelson said.
“Well I think you’re going to make an investment, but you’re going to get your money back very quickly,” Trump responded.
Trump says the U.S. government may reimburse oil companies for rebuilding Venezuela’s infrastructure
Big oil firms will either “get reimbursed by us or through revenue,” Trump told NBC News in an exclusive interview.
https://www.nbcnews.com/business/energy/trump-venezuela-oil-companies-reimburse-rcna252434