| Engineer | Form: (06)
401118726
10/17/2016 | 1) Due to past bradenhead pressure; within 30 days prior to starting plugging operations, a bradenhead test shall be performed. The Form 17 shall be submitted within 10 days of the test. Within six months prior to plugging, collect bradenhead and production gas samples for laboratory analysis. The gas analysis shall be for composition and stable carbon isotopes. The compositional analysis at a minimum shall include Hydrogen, Argon, Oxygen, Carbon Dioxide, Nitrogen, Methane, Ethene, Ethane, Propene, Propane, Isobutane, Butane, Isopentane, Pentane, Hexanes +, Specific Gravity and British Thermal Units (BTU). Stable carbon isotope analysis shall include delta DC1, delta 13C1, delta 13C2, delta 13C3, delta 13IC4, delta 13NC4, delta 13IC5 (if possible), delta 13NC5 (if possible), delta 13C6+ (if possible) and stable isotopes of CO2 if possible. If liquid is encountered in the bradenhead then collect samples, analysis of the liquid samples shall be conducted to provide an evaluation of the liquid source. Submit for the laboratory analysis of major anions (chloride, carbonate, bicarbonate, and sulfate), cations (sodium, potassium, calcium, and magnesium) total dissolved solids (TDS), BTEX, DRO, GRO and dissolved gasses (RSK 175). If there is a limited amount of water available then anions, cations and BTEX should be given first priority. Copies of all final laboratory analytical results shall be provided to the COGCC within three months of collecting the samples in an approved electronic data deliverable format.
2) Provide 48 hour notice of plugging MIRU via electronic Form 42.
3) Properly abandon flowlines as per Rule 1103. File electronic Form 42 once abandonment complete.
4) After pumping stub plug, shut down and wait on cement at minimum 4 hours; verify gas migration has been eliminated. If evidence of gas migration or pressure remains call COGCC Engineer for an update to plugging orders. If surface casing shoe plug is not circulated to surface then tag plug – must be 714’ or shallower and provide 10 sack plug at the surface. Leave at least 100’ cement in the wellbore for each plug. |
| Engineer | Form: (06)
401415370
10/13/2017 | Reporting
• Form 17 Bradenhead Test Report shall be submitted within 10 days of the test.
• File electronic Form 42 once flowline abandonment is complete.
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| Engineer | Form: (06)
401415370
10/13/2017 | Plugging
• Provide 48 hour notice of plugging MIRU via electronic Form 42.
• After pumping the squeeze at 2500' and prior to cutting the casing at 1047', shut down and wait on cement per slurry design and monitor well for fluid or gas migration. If fluid or gas migration persists, contact COGCC Engineer for revised plugging orders.
• If there is fluid migration or shut-in pressure on the well prior to pumping any plug (annular or casing) that isolates deepest aquifer or the surface casing shoe (whichever is deeper) contact COGCC Engineer for revised plugging orders.
• If the shoe plug, or combined stub/shoe plug, is not circulated to the surface then the plug shall be tagged and must be 50’ into the shoe, or 50’ above the cut, whichever is shallower.
• Place a 50' plug(minimum) at the surface, all other plugs shall have at least 100' of cement left in the casing.
• Properly abandon flowlines as per Rule 1103. |
| Engineer | Form: (06)
401415370
10/13/2017 | Bradenhead Testing
Prior to starting plugging operations, a bradenhead test shall be performed. If the initial shut-in bradenhead pressure is greater than 25 psi or liquid is present at any time during the test, notify COGCC Engineer for sampling requirements prior to proceeding with the test. Sampling shall comply with Operator Guidance - Bradenhead Testing and Reporting Instructions, Appendix A: Liquid and Gas Sampling. |