EasternOil Services, Inc.
- Oil and gas exploration and production data for Azerbaijan, Kazakhstan, Russia, Ukraine, Georgia, Bulgaria, Turkey, Daghestan, Turkmenistan and Iran. Based in Irving, Texas.
- http://www.eastoil.com/

Lasser, Inc.
- Provides production and well data on CD ROM: Texas, New Mexico, Louisiana and Gulf of Mexico. Based in Fort Worth, Texas.
- http://www.lasser.com/

Earth Science Associates, Inc.
- Specializes in oil and gas resource assessment, economic evaluation, risk studies and the development of custom geographic information systems. Located in Long Beach, California.
- http://www.earthsci.com/