NOE_708374_CVGS_Rework_UGS
Summary
SCH Number
2025070261
Public Agency
California Department of Conservation
(DOC)
Document Title
NOE_708374_CVGS_Rework_UGS
Document Type
NOE - Notice of Exemption
Received
Posted
7/7/2025
Document Description
There is a known integrity issue with the C.V.G.S. 3L (0401120970) well. There continues to be sustained casing pressure on the annular space between the production casing and surface casing and there are exposed perforations in the production casing above the storage zone. This Rework is intended to remediate the sustained casing pressure and restore mechanical integrity to the production casing to enable the well to be placed back into service in a manner compliant with all CalGEM regulations applicable to Gas Storage wells, using a workover rig and other minor equipment. The Rework of the 3L well includes installation and testing of temporary equipment, circulating well control fluid in the wellbore, retrieving temporary plugs, using a casing expander tool to remediate the sustained casing pressure, installation of at least one production casing patch, mechanical integrity tests, reinstallation of tubing, and treating the lateral portion of the wellbore with acid (below the Acid Volume Threshold). Temporary equipment such as a workover rig, blowout prevention equipment, small generators, pumps, return bins, and wireline trucks will be needed. No permanent facilities will be constructed. No expansion of associated facilities will be required. Waste materials will be properly disposed of as non-hazardous or hazardous waste, as appropriate, at a facility licensed to accept the waste.
The proposed project consists of the California Department of Conservation, Geologic Energy Management Division (CalGEM) approving # permit(s) for Operator Name to rework the well(s) listed below, in the Name of Oil Field, to address well integrity issues.
API # Well Name
0401120970 C.V.G.S. 3L
Contact Information
Name
Michael Spann
Agency Name
Department of Conservation, Geologic Energy Management Division
Job Title
Staff Services Manager
Contact Types
Responsible Agency
Phone
Name
Felicia Roe
Agency Name
Central Valley Gas Storage
Job Title
Agent
Contact Types
Project Applicant
Phone
Email
Location
Coordinates
Counties
Colusa
Regions
Northern California, Statewide
Township
18N
Range
02W
Section
25
Base
MD
Other Location Info
Princeton Gas Oil Field
Notice of Exemption
Exempt Status
Categorical Exemption
Type, Section or Code
Class 1, Existing Facilities (14 CCR §§ 15301, 1684.1)
Reasons for Exemption
The “Class 1” (14 CCR § 15301) exemption is applicable per the CEQA Guidelines and CalGEM’s regulations (14 CCR § 1684.1) because the proposed work consists of repair, maintenance, or minor alteration of an existing previously permitted well involving no expansion of former use. The Class includes, but is not limited to: remedial, maintenance, conversion, and abandonment work on oil, gas, injection, and geothermal wells. The well would maintain its existing well type and the use of the well would remain the same as before.
Exempt Status
Categorical Exemption
Type, Section or Code
Class 2, Replacement or Reconstruction (14 CCR § 15302)
Reasons for Exemption
Class 2 applies because it consists of “replacement or reconstruction of existing structures and facilities where the new structure will be located on the same site as the structure replaced and will have substantially the same purpose and capacity as the structure replaced.” Examples of Class 2 include, but are not limited to, “Replacement or reconstruction of existing utility systems and/or facilities involving negligible or no expansion of capacity.” The proposed project is the rework of the existing wellbore which is needed to remediate the sustained casing pressure and restore mechanical integrity to the production casing to enable the well to be placed back into service in a manner compliant with all CalGEM regulations applicable to Gas Storage wells. The rework will be on the same site and would have substantially the same purpose and capacity as the well did before the rework. Additionally, no additional construction will occur.
Exempt Status
Categorical Exemption
Type, Section or Code
Class 4, Minor Alterations to Land (14 CCR §§ 15304, 1684.2):
Reasons for Exemption
Class 4 exemption applies. The proposed project would be conducted entirely on an existing pad with enough space to contain all equipment. The project would not disturb any undisturbed areas. The proposed project is located within an industrial area. Therefore, the proposed project “consists of drilling operations that result in only minor alterations with negligible or no permanent effects to the existing condition of the land, water, air, and/or vegetation.” The rework would not expand the facility.
Attachments
Notice of Exemption
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