Underground injection wells shall be classified as follows:
- (1) Enhanced recovery injection well. An enhanced recovery injection well is a well which injects fluids to increase the recovery of hydrocarbons.
- (2) Disposal well. A disposal well is a well which injects, for purposes other than enhanced recovery, those fluids brought to the surface in connection with oil or natural gas production.
- (3) Storage well. A storage well is a well used to inject, for storage purposes, hydrocarbons which are liquid at standard temperature and pressure.
- (4) Simultaneous injection well. A well that injects or disposes of salt water at the same time it is producing oil and/or gas to the surface.
Amended at 13 Ok Reg 2381, eff 7-1-96