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 › Appendix A - Risk Activity Table

Current through July 13, 2024
Major Risk (Feature, Event, or Process)
1
Mineral Rights Infringement (Trespass)
1.1
Leakage migrates into mineral zone or hydraulic
							 front impacts recoverable mineral zone; causes may include plume migration
							 different than modeled.
1.2
Post injection discovery of recoverable
							 minerals.
1.3
New technology (or economic conditions) enables
							 recovery of previously uneconomically recoverable minerals.
1.4
Act of God (e.g. seismic event).
1.5
Formation fluid impact due to
							 CO2 injection.
1.6
Address also contributing causes 3.1, 3.2, 3.3, 3.5,
							 4.3, and 4.4
2
Water Quality Contamination
2.1
Leakage of CO2 outside
							 permitted area.
2.2
Leakage of drilling fluid contaminates potable water
							 aquifer.
2.3
Rock/acid water (i.e. geochemistry) interaction
							 contaminates potable water by carryover of dissolved contaminants.
2.4
Act of God (e.g. seismic event).
2.5
Formation fluid impact due to
							 CO2 injection.
2.6
See also contributing causes 3.1, 3.2, 3.3, 3.5,
							 4.3, and 4.4
3
Single Large Volume CO2
							 Release to the Surface - Asphyxiation/Health/Ecological
3.1
Over pressurization (i.e. induced).
3.2
Caprock/reservoir failure.
3.3
Well blowout (e.g. at surface or bore failure below
							 ground), includes monitoring wells - Causes could include seal failure (e.g.
							 well, drilling or injection equipment).
3.4
Major mechanical failure of distribution system or
							 storage facilities above ground or below ground (i.e. near the surface).
3.5
Orphan well failure (e.g. well not identified prior
							 to injection).
3.6
Sabotage/Terrorist attack (e.g. on surface
							 infrastructure).
3.7
Act of God (e.g. major seismic event)
4
Low Level CO2 Release
							 to Surface - Ecological damage due to low-level releases; potential
							 asphyxiation of human or ecological receptors
4.1
Over pressurization (i.e. induced).
4.2
Caprock/reservoir failure (e.g. Plume migrates along
							 fault line/fissure to surface).
4.3
Incomplete geological seal (e.g. inaccurate
							 characterization of sub-surface geology).
4.4
Well seal failure (e.g. well, drilling or injection
							 equipment) including monitor wells
4.5
Mechanical failure of distribution system or storage
							 facilities above or below ground (e.g. near surface).
4.6
Orphan wells (e.g. well not identified prior to
							 injection).
4.7
Induced seismicity leading to leakage.
4.8
Act of God (e.g. seismic event).
Major Risk (Feature, Event, or Process)
5
Storage Rights Infringement
							 (CO2 or other entrained contaminant gases) - Form of
							 Mineral Rights Infringement
5.1
Leakage migrates into adjacent pore space; causes
							 may include plume migrates faster than modeled.
5.2
Post injection decision (e.g. due to new technology
							 or changed economic conditions) to store gas in adjacent pore space.
5.3
Acts of God affecting storage capacity of pore
							 space.
5.4
Formation fluid impact due to
							 CO2 injection.
5.5
Will also require primary contributing causes 3.1,
							 3.2, 3.3, 3.5, 4.3, and 4.4
6
Modified Surface Topography (subsidence or
							 uplift) Resulting in Property/Infrastructure Damage
6.1
Induced Seismicity - Pressure from geochemistry
							 induced reactivation of historic fault or dissolution of material caused by
							 subsidence.
6.2
Formation fluid impact due to
							 CO2 injection.
7
Entrained Contaminant
							 (Non-CO2
) Releases
7.1
Change in CO2
							 composition/properties (e.g. concentration of contaminate in CO2
							 supply increases).
7.2
Microbial activity initiated by injection process or
							 composition.
Will also require primary contributing causes 3.1,
							 3.2, 3.3, 3.5, 4.3, and 4.4
8
Accidents/Unplanned Events (Typical Insurable
							 Events)
8.1
Surface infrastructure damage
8.2
Saline water releases from surface storage
							 impoundment.