Construction requirements

1. All injection wells must be cased and cemented to prevent movement of fluids into or between underground sources of drinking water or into an unauthorized zone. The casing and cement used in construction of each new injection well must be designed for the life expectancy of the well. All wells used for injection into a storage reservoir or salt cavern must have surface casing set and cemented at a point not less than fifty feet [15.24 meters] below the base of the Fox Hills formation. In determining and specifying casing and cementing requirements, all the following factors must be considered: a. Depth to the injection zone and lower confining zone, or salt cavern specifics. Long string casing must be set at least to the top of the injection zone and cemented as approved by the director. b. Depth to the bottom of all underground sources of drinking water. c. Estimated minimum, maximum, and average injection pressures. d. Fluid pressure. e. Estimated fracture pressures. f. Physical and chemical characteristics of the injection zone. 2. Appropriate logs and other tests must be conducted during the drilling and construction of injection wells. Any well drilled or converted to an injection well must have a cement bond log from which a presence of channels and microannulus can be determined radially. Cement bond logs must contain elements approved by the director. 3. After an injection well has been completed, approval must be obtained on a sundry notice filed on a form provided by the director before any subsequent perforating.