Where are disposal wells?

Disposal, or injection wells, are used throughout the world. In the United States, disposal wells associated with oil and gas production are regulated as Class II wells while industrial injectors are regulated as Class I wells. In the oil and gas industry, disposal wells can be found in most areas where hydrocarbons are produced. Class I wells are used in areas where there is industrial need and where both restrictive geologic and hydrologic standards can be met. A primary consideration in well location is the natural ability of underground formations to contain and isolate both natural and injected fluids. The geology in many areas of the United States where a thick section of sedimentary rock is present often meet these strict requirements. There are more than 200,000 disposal wells currently operating throughout the United States. Approximately 500 of these injectors are Class I wells.