Oil Producers, CO2 Source Companies, Research Organizations
- Denbury Resources
- Kinder Morgan Energy Partners, L.P.
- Plains CO2 Reduction Partnership (UND)
- Enhanced Oil Recovery Institute (WY)
- Interstate Oil and Gas Compact Commission
- Numerous Independent Oil & Gas Companies
- Mobil Exploration and Producing Inc, U.S. (now Exxon)
- Pioneer Natural Resources
- Praxair Corporation
- Shell International
- Siemens Oil and Gas
- Westinghouse
- University of Texas System
- U.S. Air Force
- U.S. Army
- U.S. Dept of Energy
- Texas Railroad Commission
- National Energy Technology Laboratory
- The Petroleum Technology Transfer Council
