Well construction requirements - Injection wells

The following construction requirements apply to injection wells and are in addition to the requirements of section 43-02-02.2-26: 1. Appropriate logs and other tests must be maintained and conducted during the drilling and construction of injection wells. A descriptive report prepared by a knowledgeable log analyst interpreting the results of such logs must be submitted to the department. The logs and tests appropriate to each type of injection well must be determined based on the intended function, depth, construction, and other well characteristics, availability of similar data in the area of the drilling site, and the need for additional information that may arise from time to time during the well's construction; and 2. All injection wells must be constructed to prevent the migration of fluids to unauthorized zones. The casing and annular sealing material used in each newly drilled well must be designed for the well's life expectancy. In determining these requirements the following factors must be considered: a. Depth to the deepest injection zone; b. Injection pressure, external and internal pressure, axial loading, and related information; c. Hole size; d. Size and grade of all casing strings, including well thickness, diameter, nominal weight, length, joint specification, and construction material; e. Corrosiveness of injected fluids and formation fluids; f. Lithology of injection zone and confining zones; and g. Type and grade of cement used to seal the annular space between the outer casing and the borehole.