| Engineer | Form: (06 )
401787129
10/22/2018 | Plugging
• Provide 48 hour notice of plugging MIRU via electronic Form 42.
• Plugs and squeezes will be placed as stated in the plugging procedure of the approved NOI unless revised by COA or prior approval from COGCC is obtained.
• COGCC does not have a CBL on file that verifies the cement coverage from TD-6730’. Operator will verify cement coverage by CBL and submit log with Form 5 SRA. If coverage is not as represented herein then the operator will contact the COGCC Engineer for revised plugging orders prior to continuing with plugging operations.
• If there is any pressure/fluid on the surface casing during the pre-plugging bradenhead test operator must wait 8 hrs after pumping plug at 2000-1804’ and check 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.
• Tag plug at 2000-1804’ if circulation is not maintained while pumping and displacing plug to depth, minimum plug height required is 100’.
• COGCC Change: Move CIBP from 80’ to 200’ and cement to surface, aquifer isolation. Adjust cement volume accordingly.
• COGCC Change: Increase shoe plug to 750-440’, water well. Adjust cement volume accordingly.
• Submit gyro run 6/3/13 with form 6 SRA.
• 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. Shoe plug shall be placed as specified herein and the top of cement must be a minimum 50’ into the shoe, or 50’ above the stub (if not cut below the shoe), 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 on-location flowlines as per Rule 1105. File electronic Form 42 once abandonment complete. Within 30 days of an operator completing abandonment requirements for an off-location flowline or crude oil transfer line the operator must submit a Flowline Report, Form 44.
|
| Engineer | Form: (06 )
401787129
10/22/2018 | 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 )
401787129
10/22/2018 | 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.
|