Exhibit 21.1

List of Subsidiaries of Oasis Petroleum Inc.

Name of Subsidiary						Jurisdiction of Incorporation or Organization
Oasis Petroleum LLC						Delaware
Oasis Petroleum North America LLC						Delaware
Oasis Petroleum Permian LLC						Delaware
Oasis Petroleum Marketing LLC						Delaware
Oasis Well Services LLC						Delaware
OMS Holdings LLC						Delaware
Oasis Investment Holdings LLC						Delaware
Oasis SASR Holdings LLC						Delaware