Aug 3 (Reuters) - Occidental Petroleum Corp reported an adjusted profit in the second quarter versus a loss in the previous quarter, lifted by higher crude prices as easing travel curbs and rising COVID-19 vaccinations boosted fuel demand. The oil and gas producer said on Tuesday adjusted profit attributable to common stockholders stood at $311 million, or 32 cents per share, for the three months ended June 30. It reported a loss of $136 million, or 15 cents per share, in the prior quarter. (Reporting by Arunima Kumar in Bengaluru) Our Standards: The Thomson Reuters Trust Principles.