The US military strikes in Venezuela and comments afterwards by President Donald Trump have raised the prospect of a massive increase in Venezuelan oil production under US control. It’s not clear when, how, or even if this can happen. But Venezuela has the world’s largest proven reserves, and Trump has suggested that US companies can bring them to market. Venezuela's extra-heavy crude is highly sought after as it's ideal for specialized refineries -- such as those on the US Gulf Coast -- that have coker units allowing them to process…