Organization and Operations of the Company	12 Months Ended
	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Operations of the Company	Organization and Operations of the CompanyOasis Petroleum Inc. (together with its consolidated subsidiaries, “Oasis” or the “Company”) is an independent exploration and production (“E&P”) company focused on the acquisition and development of onshore, unconventional crude oil and natural gas resources in the United States. Oasis Petroleum North America LLC (“OPNA”) and Oasis Petroleum Permian LLC (“OP Permian”) conduct the Company’s E&P activities and own its oil and gas properties located in the North Dakota and Montana regions of the Williston Basin and the Texas region of the Permian Basin, respectively. In addition to its E&P segment, the Company also operates a midstream business segment primarily through Oasis Midstream Partners LP (“OMP”), a consolidated subsidiary of the Company. OMP is a gathering and processing master limited partnership that owns, develops, operates and acquires a diversified portfolio of midstream assets.