26 Miss. Code. R. 3-1.5
The operator shall comply with the following minimum plugging and abandonment procedures which have general application to all wells drilled for oil and gas. Plugging and abandonment operations must not be commenced prior to obtaining approval from an authorized representative of the Board. Where not in conflict with this rule or special field rules, Statewide Rules 27 and 28 shall be followed:
In uncased portions of wells, cement plugs shall be spaced to extend 100 feet below the bottom to 100 feet above the top of any oil, gas and fresh water zones so as to isolate them in the strata in which they are found and to prevent them from escaping into other strata.
Where there is open hole (uncased and open into the casing string above) below the casing, a cement plug shall be placed in the deepest casing string by (1) or (2) below, or in the event lost circulation conditions exist or are anticipated, the plug may be placed in accordance with (3) below:
A cement plug shall be placed opposite all open perforations (perforations not squeezed with cement) extending a minimum of 100 feet above and 100 feet below the perforated interval or down to a casing plug whichever is less. In lieu of the cement plug, a bridge plug set at a maximum of 150 feet above the open perforations with fifty (50) feet of cement on top may be used, provided the perforations are isolated from the hole below.
If casing is cut and recovered, a cement plug 200 feet in length shall be placed to extend 100 feet above and 100 feet below the stub. A retainer may be used in setting the required plug.
No annular space that extends to the waters' floor shall be left open to drilled hole below. If this condition exists, the annulus shall be plugged with cement.
A cement plug of at least 150 feet, with the top of the plug 150 feet or less below the waters' floor, shall be placed in the smallest string of casing which extends to the surface.
The setting and location of the first plug below the top 150-foot plug will be verified by either (1) placing a minimum pipe weight of 15,000 pounds on the plug, or (2) testing with a minimum pump pressure of 1,000 psig with no more than a ten percent (10%) pressure drop during a fifteen (15) minute period.
Each of the respective intervals of the hole between the various plugs shall be filled with mud fluid of sufficient density to exert hydrostatic pressure exceeding the greatest formation pressure encountered while drilling such interval.
All casing and piling shall be severed and removed to at least fifteen (15) feet below the waters' floor, and the location shall be dragged to clear the well site of any obstructions.
Any drilling well which is to be temporarily abandoned shall be mudded and cemented as required for permanent abandonment except for requirements F and I of Paragraph 1 above. When casing extends above the waters' floor, a mechanical bridge plug (retrievable or permanent) shall be set in the casing between fifteen (15) and 200 feet below the waters' floor.
26 Miss. Code. R. 3-1.5