| Engineer | Form: (02 )
1633000
2/14/2011 | Prior to recomplete, operator must: 1) Verify existing cement with a cement bond log. 2) If it is not present as follows, provide remedial cement 200’ above Niobrara (minimum cement top of 7005’), 200’ below Sussex to 200’ above Sussex (minimum coverage 4850’ to 4350’), and 1060' into the surface casing shoe. Verify remedial cement coverage with cement bond log. |
| Engineer | Form: (06 )
401758454
9/28/2018 | 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.
• Submit Codell formation top.
• COGCC Change: Move CIBP from 7240’ to 7190’ with 30 sx plug on top of it
• COGCC Change: Add 40 sx squeeze at 4100’+/-, Sussex isolation.
• COGCC Change: Add 40 sx squeeze at 1300’+/-, aquifer isolation.
• COGCC Change: Increase shoe plug coverage to 330-0’ (from 280-0’) for aquifer isolation. Adjust cement volume accordingly.
• Submit corrected WBD’s with Form 6(S) to reflect the pre-plugging state of the well regarding squeeze work as reported on previous submittals to COGCC. The as plugged diagram with the 6(S) should have these changes as well.
• 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.
• 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.
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| Engineer | Form: (06 )
401758454
9/28/2018 | 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.
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| Engineer | Form: (06 )
401758454
9/28/2018 | 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.
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