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 Marketing LLC	Delaware
Oasis Well Services LLC	Delaware
Oasis Petroleum Permian LLC	Delaware
Oasis Midstream Services LLC	Delaware
OMS Holdings LLC	Delaware
OMP GP LLC	Delaware
Oasis Midstream Partners LP	Delaware
OMP Operating LLC	Delaware
Bobcat DevCo LLC	Delaware
Beartooth DevCo LLC	Delaware
Bighorn DevCo LLC	Delaware