STATE OF ALASKA

ALASKA OIL AND GAS CONSERVATION COMMISSION

3001 Porcupine Drive

Anchorage, Alaska 99501-3912
Re:  REQUEST BY THE NORTH SLOPE          )          Disposal Injection Order No. 5      
      BOROUGH to dispose of non-                    )
      hazardous gas field waste                         )          Barrow Gas Field
      fluids by underground                               )
      injection in well South                              )
      Barrow No. 5, Barrow Gas                       )
      Field.                                                     )
                                                                              September 30, 1987
IT APPEARING THAT:

1. The North Slope Borough (NSB) requested on July 22, 1987 the Alaska Oil and Gas Conservation Commission authorize the use of well NSB South Barrow No. 5 (SB 5) as a disposal well in the Barrow Gas Field. The field operator will inject non-hazardous waste fluids generated by normal drilling andproduction operations.i

2. Notice of a public hearing held August 31, 1987 was published in the Anchorage Daily News on July 25, 1987.

3. A hearing covering the matter of the applicant's request was held in conformance with 20 AAC 25.540 at the office of the Commission, 3001 Porcupine Drive, Anchorage, Alaska 99501 at 9:00 a.m. on August 31, 1987.

4. Members of the staff of the North Slope Borough presented testimony. The hearing record was closed at the end of the public hearing.

FINDINGS:

1. The base of permafrost in the area of the proposed injection well is approximately 550 feet.

2. Electric log analyses of wells in the area of the proposed injection well indicate no freshwater zones below the base of the permafrost.

3. Injection into, through, or above a freshwater aquifer or underground source of drinking water will not occur.

4. Permeable strata that will accept injected fluids are present below 2276 feet in the NSB SB 5 well.

5. Impermeable shales and mudstones above 2276 feet in the NSB SB 5 well will prevent upward movement of the injected fluids.

6. The strata into which fluids are to be injected will accept fluids at injection pressures which are less than the fracture pressure of the confining strata.

7. To ensure that waste fluids are confined to injection strata, the mechanical integrity of SB 5 will be demonstrated periodically and monitored routinely for disclosure of possible abnormalities in operating conditions.

8. Less stringent requirements for well construction, monitoring, and reporting of injection operations may be appropriate than would be required when injection occurs into, through, or above freshwater aquifers.

CONCLUSIONS:

The sedimentary sequence present at the well site and maintenance of the mechanical integrity of SB 5 will prevent movement of injected fluids into sediments overlying the injection zone.

NOW, THEREFORE, IT IS ORDERED THAT non-hazardous oil field waste fluids for the purpose of disposal may be injected in conformance with Alaska Administrative Code Title 20, Chapter 25, into the Kingak formation below the measured depth of 2276 feet in well SB 5.

DONE at Anchorage, Alaska, and dated September 30, 1987.

Lonnie C. Smith, Commissioner
Alaska Oil and Gas Conservation Commission

W. W. Barnwell. Commissioner
Alaska Oil and Gas Conservation Commission

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