What are Class II wells?
Class II wells inject fluids directly associated with oil and natural gas production wells. Generally, when oil or gas is produced from underground, a lot of water comes up with it. This “formation water” is normally saline and contaminated by the petroleum. These fluids can be disposed of in a Class II injection well along with certain non-hazardous waste fluids from any on-site gas plant. Wells injecting certain petroleum products underground for storage are also considered Class II wells. Class II wells also include enhanced recovery wells. These wells, often called “waterflood” wells, are used to inject water or other fluids back into the producing formation to force out more oil and gas.
