| Agency | Form: (02 )
1759267
10/1/2009 | <style type="text/css">
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<p><span class="Normal">1) Note surface casing setting depth change from 700’ to 1080’. Increase cement coverage accordingly and </span><span class="Normal">cement to surface. 2) Provide 24 hour notice of MIRU to Jim Precup at 303-469-1902 or e-mail at </span><span class="Normal">james.precup@state.co.us 3) Comply with Rule 317.i and provide cement coverage from TD to a minimum of </span><span class="Normal">200' above Niobrara. Verify coverage with cement bond log. 4) Comply with Rule 321. Run and submit </span><span class="Normal">Directional Survey from TD to base of surface casing. Ensure that the wellbore complies with setback </span><span class="Normal">requirements in commission orders or rules prior to producing the well.</span></p>
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| Engineer | Form: (06 )
401202657
2/14/2017 | 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. 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. If sufficient condensate is present to collect a sample then it should be submitted for whole oil by GC analysis or equivalent. The analysis should include the bio-markers Phytane and Pristane. 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) Please submit gyro survey data with Form 6 Subsequent Report of Abandonment.
5) After pumping plug on top of CIBP at 5900' shut down and wait on cement at minimum 4 hours; verify gas migration has been eliminated. If evidence of gas migration or pressure remains contact COGCC Engineer for an update to plugging orders. If plug on CICR at 1900' is not circulated to surface then tag plug – must be 1123’ or shallower and provide 15 sack plug at the surface. Leave at least 100’ cement in the wellbore for each plug. |
| Engineer | Form: (06 )
401936027
3/4/2019 | Plugging
• Provide 48 hour notice of plugging MIRU via electronic Form 42.
• Plugs and squeezes will be placed as stated in the Plugging Procedure section of the approved NOIA unless revised by COA or prior approval from COGCC is obtained.
• COGCC Change: Move CIBP with 2 sx of cement from 7670’ to 7655’.
• COGCC Change: Add a CIBP with 2 sx of cement at 4800’.
• Due to the history of bradenhead pressure on this well, operator must wait 8 hrs after pumping the 2500-2304’ plug and assure there is no 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 2500-2304’ if circulation is not maintained while pumping and displacing plug to depth, 100’ minimum required.
• 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 Area 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. Confirm cement to surface in all strings during cut and cap.
• Properly abandon 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.
• Document COAs have been met in operations summary attached to the Form 6 SRA.
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| Engineer | Form: (06 )
401936027
3/4/2019 | 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. Submit via a Form 43 to upload the laboratory results to the COGCC Environmental Database. Form 43 instructions are on COGCC’s website under Regulation => Forms => Form 43 COGCC Environmental Database.
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| Engineer | Form: (06 )
401936027
3/4/2019 | 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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