Oasis Petroleum Schedules First Quarter 2019 Conference Call for May 8, 2019 PR Newswire HOUSTON, April 23, 2019 HOUSTON , April 23, 2019 /PRNewswire/ -- Oasis Petroleum Inc. (NYSE: OAS) ("Oasis" or the "Company") plans to announce its First Quarter 2019 financial and operational results on Tuesday, May 7, 2019 after the close of trading on the NYSE. Additionally, the Company will host a live webcast and conference call on Wednesday, May 8, 2019 at 10:00 a.m. Central Time to discuss First...