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