InvestmentsTop Global NewsMarketsReal Estate Oasis Petroleum files for bankruptcy as shale slump drags on By financialnews_rlv83x - September 30, 2020 0 172 Oasis Petroleum Inc filed for Chapter 11 bankruptcy protection on Wednesday, the latest U.S. shale producer to seek court-aided restructuring as the energy industry reels under an unprecedented crash in oil prices due to the COVID-19 pandemic.