Donald Trump has asked for at least $100bn (£75bn) in oil industry spending for Venezuela, but received a lukewarm response at the White House as one executive warned the South American country was currently “uninvestable”.

Bosses of the biggest US oil firms who attended the meeting acknowledged that Venezuela, sitting on vast energy reserves, represented an enticing opportunity.

But they said significant changes would be needed to make the region an attractive investment. No major financial commitments were immediately forthcoming.