Venezuelan Maduro will destroy country’s oil sector himself, and the process of destruction has already started. It is highly likely that U.S. is going to implement full embargo soon, and additionally, according to Forbes:”While Venezuela and PDVSA have technically been in default since November, their bondholders and creditors have until recently been patient about debt repayment schedules. The recent move by ConocoPhillips to seize PDVSA assets in the Caribbean as compensation for the $2 billion of upstream holdings that Venezuela nationalized in 2007 could not only deal a blow to the state oil company’s exports, but also set off a wave of legal claims from numerous creditors seeking payment before PDVSA’s cash flow dries up.”
Source: https://www.forbes.com/sites/daneberhart/2018/05/23/how-to-deal-with-venezuela-without-shocking-oil-markets/#5fabdd731aa5

Oil backed Petro is next to go