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THUMS (C-605) Well Rework Program at Island Chaffee

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THUMS Long Beach CO. seeks to rework an existing injection well, C-605, located in the Wilmington Oil Field on Island Chaffee, with the approval of CalGEM under permit #7056195. The rework involves running a casing sleeve within the existing wellbore and replacing the internal injection equipment to restore the well to its original function, without expanding its operational scope. This project is classified under Group D of CalGEM’s December 2023 rework exemptions guidance, indicating it qualifies for streamlined regulatory review due to its minimal environmental and operational impact. The well, identified by API number 0423720591, remains within its historic use parameters, and no new drilling or significant equipment modifications are planned. The project is forecasted with a posted date of June 12, 2026, and is managed by the California Department of Conservation’s Geologic Energy Management Division, with primary point of contact being Associate Oil and Gas Engineer Salma Khatun and agent Pradeep Thallapalle.

General Info

Rework injection well C-605 with casing sleeve, no new drilling, minimal impact, CalGEM permit #7056195, Group D exempt.

Agency

California Conservation, Department of

NAICS

213111 - Drilling Oil and Gas WellsView NAICS

Place of Performance

CA

Set-Aside

NONE

Documents

(1)

Notice of Exemption for THUMS C-605 Well Rework Program

PDF•notice-of-exemption

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Timeline

PostedJun 12

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Organization & Contact Information

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AgencyCalifornia Conservation, Department of

Contacts2 people available

OfficeN/A

Organization / Agency

California Conservation, Department of

Office AddressN/A

Contacts

Salma KhatunAssociate Oil and Gas Engineer

contact@example.gov

+1 (555) 000-0000

Pradeep ThallapalleAgent

contact@example.gov

+1 (555) 000-0000

Full Description

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THUMS proposes to rework an existing injection well in the Wilmington field on Island Chaffee (C605). The reworks consist of running a casing sleeve and then replacing injection equipment inside the existing wellbore and returning the well to existing use. This well falls under Group D, of CalGEMs rework exemptions guidance document published in December 2023. The proposed project consists of the California Department of Conservation, Geologic Energy Management Division (CalGEM) approving permit # 7056195 for THUMS Long Beach CO. to rework the well listed below, in the Wilmington Oil Field. API # 0423720591 Well Name C-605

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