Shitty oil that's very expensive to process (and can realistically only be processed in the US). Venezuelan oil only makes sense when the price of oil is guaranteed to be high.

How do you keep the price of oil high? Decrease gas mileage standards for cars and trucks. Start stupid wars. Un-subsidize electric cars. Make it more profitable to produce gas guzzling trucks than sedans.

This Venezuela thing is just another step in the oil billionaire TODO list.