| Engineer | Form: (06 )
401568784
4/24/2018 | Plugging
• Provide 48 hour notice of plugging MIRU via electronic Form 42.
• COGCC Change: Tag plug at 8170’, place 2 sx of cement.
• COGCC Change: Increase volume of plug at 5360’ to 15 sx, depth to bottom of plug remains the same.
• COGCC Change: Add 10 sx casing plug at 4628-4528’.
• COGCC Change: Increase volume of plug at 1275’ to 20 sx, depth to bottom of plug remains the same.
• COGCC Change: Add CIBP with 2 sx at 800’.
• Any plug or squeeze pumped to isolate pressure downhole will require an 8 hr shut-in period for the well to stabilize before checking for fluid migration or shut-in pressure on the well. Contact COGCC Engineer for revised plugging orders if well is not static at this time, prior to continuing with plugging operations.
• Check for fluid migration or shut-in pressure on the well prior to pumping any plug(open hole, annular or casing) that isolates deepest aquifer or the surface casing shoe (whichever is deeper). Contact COGCC Engineer for revised plugging orders if well is not static at this time, prior to continuing with plugging operations.
• Tag required if the shoe plug, or combined stub/shoe plug, is not circulated to the surface and top of cement must be 50’ into the shoe, or 50’ above the stub, whichever is shallower.
• Place a 50' plug (minimum) at the surface, both inside the inner most casing and in all annular spaces. All other cement plugs, without mechanical isolation, shall have at least 100' of cement left in the casing.
• Properly abandon flowlines as per Rule 1103. File electronic Form 42 once flowline abandonment is complete. |
| Engineer | Form: (06 )
401568784
4/24/2018 | Bradenhead Testing
• Prior to the start of plugging operations, a bradenhead test shall be performed and reported if there has not been a reported bradenhead test within the 60 days immediately preceding the start of plugging operations.
• If any of the following conditions exist then sampling of all fluids is required and sampling methods shall comply with Operator Guidance – Bradenhead Testing and Reporting Instructions, Appendix A: Liquid and Gas Sampling as found on the COGCC website, cogcc.state.co.us.
1) The initial pressure measurement on the bradenhead is greater than 25 psi, prior to blowing down any liquid or gas from the bradenhead valve, or
2) Pressure remains at the conclusion of the test, or
3) Any liquids are present anytime during the test. If so, then stop the test as soon as liquids are present and sample before resuming the test.
• Form 17 Bradenhead Test Report shall be submitted within 10 days of the test.
• If samples are collected, copies of all final laboratory analytical results shall be provided to the COGCC within three (3) months of collecting the samples. |
| Engineer | Form: (06 )
401568784
4/24/2018 | Venting
Operator shall implement measures to control unnecessary and excessive venting, to protect the health and safety of the public, and to ensure that vapors and odors from well plugging operations do not constitute a nuisance or hazard to public welfare. |