There are several types and none are for the production of oil or gas. They are: a) water injection; b) water disposal; c) observation; d) liquid petroleum; e) gas storage; f) salt production; g) dsw - development service well.
n: 1. a nonproducing well used for injecting liquid or gas into the reservoir for enhanced recovery. 2. a saltwater disposal well or a water supply well.
A well that does not produce oil or gas but that is used to inject liquids or gas into the main producing formation for such purposes as pressure maintenance, enhanced recovery, and storage or subsurface disposal of salt water and other substances.