Two shale pioneers think the days of relentless production growth from US unconventional oil fields are ending. (Bloomberg) — The days of relentless production growth from U.S. shale oil fields are ending, potentially aiding OPEC’s years-long effort to drain a worldwide supply glut, according to industry pioneers Scott Sheffield and Mark Papa. Investor calls for shale producers to shut down rigs and stop burning through cash are being heeded, Pioneer Natural Resources Co. Chief Executive Officer Scott Sheffield said on Tuesday. Across the American shale industry, output growth will slow next year, providing a boost for crude prices through the early 2020s, he said. “I don’t think OPEC has to worry that much more about U.S. shale growth long term,” Sheffield said during a conference call with analysts. He’s “definitely becoming more optimistic that we’re probably at the bottom end of the cycle regarding oil prices.” Talk of a […]