OAR 632-020-0095
Casing Requirements

(1)

The permittee of any geothermal well or prospect well must properly case the well with adequate grade casing and cement the casing where necessary to provide adequate anchor for blowout preventers. Casing design must take into account stress imposed by the maximum expected temperature and the physical effects of produced fluids and gases on casing durability. Surface casing for any well with a proposed depth of more than 500 feet must be set at a depth of at least ten percent of the proposed total depth of the well, or at least 25 feet into consolidated, competent rock, whichever is deeper, unless otherwise approved by the department. In areas with no nearby drilling history, surface casing must be set to a minimum of 300 feet into consolidated, competent rock or confining clay layer, unless otherwise approved by the department.

(2)

The permittee of a geothermal or prospect well must prevent commingling of fluids. The permittee of a geothermal or prospect well that penetrates a fresh water aquifer must set casing or tubing through this formation and cement such casing or tubing from bottom to top unless the department approves a different program.

(3)

Casing and casing seals used for prospect wells, where the temperature of groundwater does not exceed 250°F, must comply with the general standards for the construction and maintenance of water wells set by the State Water Resources Department.

(4)

Each fluid-bearing zone above the producing horizon in a geothermal resources well must be cased and sealed off to prevent the migration of formation fluids to other areas. Such casing and sealing off must be completed and tested using the methods and means prescribed by the department.

(5)

Cements used in cementing casing and sealing formations must be of a grade and type best suited for expected reservoir temperature, formation water chemistry and bonding properties. Cements acceptable for use in high-temperature holes include Modified Type A or G, Alumina Silica Flour, Phosphate Bonded Glass, or other equivalent high-temperature design cement.

Source: Rule 632-020-0095 — Casing Requirements, https://secure.­sos.­state.­or.­us/oard/view.­action?ruleNumber=632-020-0095.

632‑020‑0005
Jurisdiction and Authority 632‑020‑0010
Definitions 632‑020‑0015
Inspection and Supervision 632‑020‑0020
General Rules 632‑020‑0025
Supremacy of Special Rules 632‑020‑0028
Permit Required 632‑020‑0030
Application for Geothermal or Prospect Well 632‑020‑0031
Annual Permit Fees 632‑020‑0032
Permit Conditions 632‑020‑0035
Drilling Financial Security 632‑020‑0040
Assignment, Transfers of Ownership 632‑020‑0060
Filing of Well Records, Confidentiality 632‑020‑0065
Applications to Modify 632‑020‑0070
Well Designations 632‑020‑0090
Noise Abatement 632‑020‑0095
Casing Requirements 632‑020‑0100
Removal of Casings 632‑020‑0105
Directional Drilling 632‑020‑0110
Serving Orders 632‑020‑0115
Measurement of Geothermal Resources 632‑020‑0117
Spacing Plan 632‑020‑0120
Production Reports 632‑020‑0125
Proper Completion, Plugging, and Decommissioning 632‑020‑0130
Subsequent Decommissioning Report 632‑020‑0134
Naming of Fields 632‑020‑0135
Well Spacing 632‑020‑0138
Unit Agreements 632‑020‑0140
Commingling Production 632‑020‑0145
Pits or Sumps 632‑020‑0150
Disposal of Solid and Liquid Wastes 632‑020‑0151
Handling of Test Fluids 632‑020‑0154
Injection and Conservation 632‑020‑0155
Application to Inject 632‑020‑0156
Permit for Injection 632‑020‑0157
Injection Well Construction, Protection and Mechanical Integrity 632‑020‑0158
Wellhead Equipment, Injection Wells 632‑020‑0159
Monitoring Injection 632‑020‑0165
Judicial Review of Board Actions 632‑020‑0170
Environmental Protection 632‑020‑0175
Blowout Prevention for Geothermal Wells and Prospect Wells 2,000 Feet or More in Depth 632‑020‑0180
Blowout Prevention Rules for Prospect Wells Less than 2,000 Feet in Depth
Last Updated

Jun. 8, 2021

Rule 632-020-0095’s source at or​.us