Wyoming Administrative Code
Agency 020 - Environmental Quality, Dept. of
Sub-Agency 0011 - Water Quality
Chapter 24 - Class VI Injection Wells and Facilities Underground Injection Control Program
Section 24-14 - Construction and Operation Standards for Class VI Wells
Universal Citation: WY Code of Rules 24-14
Current through September 21, 2024
(a) The owner or operator shall design, construct, and complete all Class VI wells to meet the construction standards in this Section and to:
(i) Prevent the movement of fluids into or
between USDWs or into any unauthorized zones;
(ii) Allow the use of appropriate testing
devices and workover tools; and
(iii) Allow continuous monitoring of the
annulus space between the injection tubing and long string casing.
(b) Casing and cement or other materials used in the construction of each Class VI well shall have sufficient structural strength and be designed for the life of the well.
(i) All well materials shall be compatible
with fluids with which the materials may be expected to come into contact and
shall meet or exceed the following standards:
(A) American Petroleum Institute
Specification 5CT;
(B) American
Petroleum Institute RP 5C1;
(C)
American Petroleum Institute RP 10B-2;
(D) American Petroleum Institute
Specification 10A;
(E) American
Petroleum Institute RP 10D-2;
(F)
American Petroleum Institute Specification 11D1;
(G) American Petroleum Institute RP 14B;
and
(H) American Petroleum
Institute RP 14C.
(ii)
The casing and cementing program shall be designed to prevent the movement of
fluids into or between USDWs.
(iii)
To allow the Administrator to determine and specify casing and cementing
requirements, the owner or operator shall provide the following information in
a construction design plan:
(A) Depth to the
injection zone;
(B) Injection
pressure, external pressure, internal pressure, and axial loading;
(C) Hole size;
(D) Size and grade of all casing strings
(wall thickness, external diameter, nominal weight, length, joint specification
and construction material), including whether the casing is new or
used;
(E) Corrosiveness of the
carbon dioxide stream and formation fluids;
(F) Down-hole temperatures and
pressures;
(G) Lithology of
injection and confining zones;
(H)
Type or grade of cement and additives; and
(I) Quantity, chemical composition, and
temperature of the carbon dioxide stream.
(iv) Casing shall extend through the base of
the lowermost USDW above the injection zone and be cemented to the surface
through the use of a single or multiple strings of casing and cement.
(v) At least one (1) long string casing,
using a sufficient number of centralizers, shall be set to create a cement bond
through the overlying and underlying confining zones.
(A) The long string casing shall:
(I) Extend to the injection zone;
(II) Be cemented by circulating cement to the
surface in one (1) or more stages; and
(III) Be isolated by placing cement or other
isolation techniques as necessary to provide adequate isolation of the
injection zone and provide for protection of USDWs, human health, safety, and
the environment.
(B)
Circulation of cement may be accomplished by staging. The Administrator may
approve an alternative method of cementing in cases where the cement cannot be
recirculated to the surface if the owner or operator demonstrates by using logs
that the cement does not allow fluid movement behind the wellbore.
(vi) Cement and cement additives
shall be suitable for use with the carbon dioxide stream and formation fluids,
and be of sufficient quality and quantity to maintain integrity over the
operating life of the well.
(vii)
The integrity and location of the cement shall be verified using technology
capable of evaluating cement quality radially with sufficient resolution to
identify the location of channels, voids, or other areas of missing cement to
ensure that USDWs are not endangered and that human health, safety, and the
environment are protected. The owner or operator shall provide a cement bond
log (CBL) to the Administrator with an evaluation, certified by a licensed
professional engineer or a licensed professional geologist, of the following:
(A) Quantitative estimations of the cement
compressive strength;
(B) A bond
index; and
(C) Qualitative
interpretation of the cement-to-formation bond.
(c) All owners and operators of Class VI wells shall inject fluids through tubing with a packer set at a depth opposite a cemented interval at the location approved by the Administrator.
(i) Tubing and packer materials used in the
construction of each Class VI well shall be compatible with fluids with which
the materials may be expected to come into contact and shall meet or exceed the
following standards:
(A) American Petroleum
Institute Specification 5CT;
(B)
American Petroleum Institute RP 5C1;
(C) American Petroleum Institute RP
10B-2;
(D) American Petroleum
Institute Specification 10A;
(E)
American Petroleum Institute RP 10D-2;
(F) American Petroleum Institute
Specification 11D1;
(G) American
Petroleum Institute RP 14B; and
(H)
American Petroleum Institute RP 14C.
(ii) The Administrator shall determine and
specify requirements for tubing and packer based on the following information:
(A) Depth of setting;
(B) Characteristics of the carbon dioxide
stream (e.g., chemical content, corrosiveness, temperature, and density) and
formation fluids;
(C) Maximum
proposed injection pressure;
(D)
Maximum proposed annular pressure;
(E) Maximum proposed injection rate
(intermittent or continuous) and volume of the carbon dioxide stream;
(F) Size of tubing and casing; and
(G) Tubing tensile, burst, and collapse
strengths.
Disclaimer: These regulations may not be the most recent version. Wyoming may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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