1 / 21

CASING PRESSURE NTL

CASING PRESSURE NTL. Gulf Coast Environmental Affairs Group (GCEAG) Meeting RUSSELL HOSHMAN May 14, 2009 Houston, TX. MMS Contact Information. Ken Kinnett Phone Number: 504-736-2847 e-mail: kenneth.kinnett@mms.gov. 2009 Casing Pressure NTL.

Sophia
Download Presentation

CASING PRESSURE NTL

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CASING PRESSURE NTL Gulf Coast Environmental Affairs Group (GCEAG) Meeting RUSSELL HOSHMAN May 14, 2009 Houston, TX

  2. MMS Contact Information Ken Kinnett Phone Number: 504-736-2847 e-mail: kenneth.kinnett@mms.gov

  3. 2009 Casing Pressure NTL • NTL No. 2009-G01 “Casing Pressure” will replace the 1994 Sustained Casing Pressure LTL • Effective date: July 1, 2009 • This NTL has being drafted into a Proposed Rule

  4. Maximum Allowable Wellhead Operating Pressure (MAWOP) • MAWOP from API RP 90 for an annulus is the lesser of the following: • 50% of the MIYP of the casing being evaluated; or • 80% of the MIYP of the next outer casing; or • 75% of the MCP of the inner tubular pipe body • The outermost pressure-containing casing MAWOP can not exceed 30% of its MIYP

  5. MAWOP Example API RP 90

  6. Monitor/Record Casing Pressure • Fixed Platform Wells, monthly, one data point/month • Hybrid and Subsea Wells, continuously, one data point/day • Departure Wells: • Manned Platform, daily, one data point/day • Unmanned Platform, weekly, one data point/week * Zero is a number, needs to be recorded.

  7. Within 30 Days of First Observing Casing Pressure or Imposing Pressure, Perform a Casing Diagnostic Test if: • Fixed Platform Wells > 100 psig • Hybrid Well Casings & Risers > 100 psig • Subsea Well, 100 psig > external hydrostatic pressure • Exemptions – Prod casing on G/L and wells undergoing startup

  8. Perform Subsequent Casing Diagnostic Test: • Once every 5 years for B,C, D, etc annuli exceeding 20% of MIYP • Once a year for A annuli exceeding 10% MIYP • When a departure expires or becomes invalid • When any casing or riser has a 200 psig increase • G/L wells shut-in or flowing for 180 days • After corrective action due to denial

  9. Maintaining Records • Two years for all casing pressure records • Must be readily available in the field • Last casing diagnostic test maintained until the well is abandoned • No longer need to notify MMS of initial casing pressure

  10. Departure Request Needed • If a Fixed Platform Well has casing pressure greater than its MAWOP • If a Fixed Platform Well has casing pressure greater than100 psig that can not bleed to zero in 24 hr or is not bled to zero • If communication exists between tubulars

  11. Departure Request Needed • If a casing has increasing pressure that is bled to prevent it from exceeding its MAWOP except during startup. • If the well is a Hybrid well with pressure > 100 psig • If the well is a subsea well with pressure > external hydrostatic pressure + 100 psig

  12. Within 14 Days after Diagnostic Test Make a Departure Request • Company name and address • Area name, OCS block number, lease number • Manned or unmanned structure • Water depth • Well name and API number • Well schematic • Well status (SI, TA, Prod., Inj., or GL) • Well type (dry tree, hybrid or subsea)

  13. Within 14 Days after Diagnostic Test make a Departure Request • All casing/riser sizes, weight, grades and MIYP • All casing/riser calculated MAWOP’s • All casing/riser pre-bleed down pressure • Shut-in and flowing tubing pressure • Volume and types of fluid bled • Last well test • Date and description of casing diagnostic test • For all casing exceed 100 psig the diagnostic test data • Concentration of H2S present.

  14. Departure Approval • MMS Regional Supervisor for Field Operations • Term to be determined on a case by case basis • May establish additional restrictions

  15. Departure Denial • Contact MMS District Manager within 72 hours • Provide Plans for corrective action within 30 days • District Manager can set time period for corrective action

  16. Corrective Action Without Departure Request • You can submit an APM or Plan for Corrective Action to the District Manager without making a departure request • Within 30 days after Diagnostics • You will still need to provide the casing pressure or diagnostic information for that well to the Regional Supervisor alone with copy of APM or Plan

  17. After Corrective Action • Perform a casing diagnostic within 30 days after corrective action taken • Submit the casing diagnostic test to the Regional Supervisor to change casing pressure well status • Submit the casing diagnostic test to the Regional Supervisor for a departure request if the diagnostic test indicates that a departure is needed.

  18. Changing Departure Status • If a well is operating under a departure and the well condition changes such that a departure is no longer needed, you must submit a diagnostic test to change the casing pressure well status.

  19. Departure Becomes Invalid • The casing or riser pressure increases by 200 psig over the departure pressure • The departure expires • The well is worked over, sidetracked, recompleted or acid stimulated

  20. Departure Becomes Invalid • A different casing or riser on the same well requires a departure • If you have more than one casing on a single well with a departure and if any one becomes invalid then they all become invalid

  21. Questions?

More Related