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Organization and Operations of the Company	12 Months Ended
Organization and Operations of the Company	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Operations of the Company	Organization and Operations of the Company Oasis Petroleum Inc. (together with its consolidated subsidiaries, “Oasis” or the “Company”) was originally formed in 2007 and was incorporated pursuant to the laws of the State of Delaware in 2010. The Company is an independent exploration and production company focused on the acquisition and development of onshore, unconventional oil and natural gas resources in the United States. Oasis Petroleum North America LLC (“OPNA”) conducts the Company’s exploration and production activities and owns its proved and unproved oil and natural gas properties located in the North Dakota and Montana regions of the Williston Basin. The Company also operates a midstream services business through OMS Holdings LLC (“OMS”), following the initial public offering of Oasis Midstream Partners LP (“OMP” or “Oasis Midstream”), which was completed on September 25, 2017, through which the Company owns a majority of the outstanding units and a well services business through Oasis Well Services LLC (“OWS”), both of which are separate reportable business segments that are complementary to its primary development and production activities.