U.S. oil giant Chevron and U.S.-linked private equity firm Quantum Capital Group are reportedly collaborating on a $22 billion bid for the international assets of Lukoil, one of Russia’s largest oil companies Chevron is interested in Lukoil’s 5% stake in Kazakhstan’s Tengiz oilfield, which Chevron partially owns and operates, as well as in refining facilities and over 2,000 filling stations across Europe, Asia and the Middle East. Quantum was founded by Texan oil tycoon Wil