A proposed US deal granting North American Blue Energy Partners a 100-year lease over 17 Venezuelan oilfields is raising concerns among major oil companies. The arrangement would give the US a 35% stake and guaranteed oil access, while NABEPs Venezuelan owner Alejandro Betancourts past investigations add uncertainty for potential investors.

Trump has long been candid about his desire for the US to secure Venezuelan oil and has urged oil companies to invest in the South American nation.

The pact would give the US 55% of a joint venture over 17 Venezuelan oilfields for 100 years. But legal, political and infrastructure risks cloud its future.

The US government plans a 35% passive stake in Alejandro Betancourt's energy company. It also seeks preferential rights to purchase 20% of production at cost. This investment is…