Oasis Petroleum is an independent exploration and production company that focuses on the acquisition and development of unconventional oil and natural gas resources in the United States. The company's operations are primarily focused on the Williston Basin in North Dakota and Montana, where it has significant acreage positions in the Bakken and Three Forks formations. Oasis Petroleum also has operations in the Delaware Basin in Texas and New Mexico. The company was founded in 2007 and is headquartered in Houston, Texas.