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천연자원 컴플라이언스 15개 항목

Well Integrity, Casing & Cementing Verification Checklist

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Verify casing design, cementing practices, and barrier evaluation for the construction and completion of an oil or gas well to ensure zonal isolation and long-term wellbore integrity.

API STD 65-230 CFR 250 Subpart DAPI RP 90State Oil & Gas Well Construction Rules

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Casing Design & Setting Depth

  • Was casing setting depth selected to isolate all usable-quality water zones and abnormal-pressure intervals per the approved well plan? *
  • Is each casing string rated for the maximum anticipated collapse, burst, and tension loads with the required design safety factors? *
  • Are casing tally, drift, and thread inspection records documented before running the string? *
  • Record the surface casing setting depth (ft). *

Cement Slurry Design & Placement

  • Was the cement slurry designed and laboratory-tested for the anticipated bottomhole temperature, pressure, and fluid compatibility? *
  • Is the calculated cement volume sufficient to achieve the required top-of-cement height above the shallowest hydrocarbon or protected water zone? *
  • Were centralizers spaced to achieve minimum standoff across critical isolation intervals? *
  • Were float equipment, spacers, and mud conditioning used to promote effective mud removal and cement placement? *

Barrier Evaluation & Testing

  • Was a cement bond / evaluation log run or an alternate zonal-isolation verification performed after cementing? *
  • Did the casing pressure test meet the required test pressure and duration without unacceptable pressure loss? *
  • Was cement returned to surface (or the shoe-track cement top confirmed) as required by the well design? *
  • Are two independent tested barriers confirmed between hydrocarbon zones and the environment? *

Documentation & Annular Monitoring

  • Are cementing job records, pump charts, and returns volumes retained in the well file? *
  • Is a program in place to monitor and manage sustained casing/annular pressure over the life of the well? *
  • Are wellhead and casing-head seal assemblies verified for pressure integrity after installation? *

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