Exxon Mobil Corp. is adjusting the way it structures shale acquisitions as the global energy giant expands in West Texas, the largest U.S. oil-producing region. Executives with Exxon’s shale-drilling unit, XTO Energy, are meeting with small, closely held producers in the Permian Basin to negotiate possible purchases and joint ventures, according to three people familiar with the talks. The company is expanding its use of a new strategy first deployed in the region last year that offers operators a cut of future proceeds rather than big upfront stock or cash payouts, say the people, who asked not to be named because the meetings were private. Stung by the 58 percent plunge in U.S. oil prices since June 2014, many drillers face stark choices: shut down rigs to conserve capital and wait out the bust, or surrender some independence to a deep-pocketed savior in exchange for a shot at a […]