![]() Wellhead movement 30" Conductor and Surface casing corrosion 18 5/8" 13 3/8" 7" Liner Top 9 5/8" 7" Liner Thamama F 6" Open Hole Safe Operating Envelope Yes No Yes No Date of update data entry Well Name Well Schematic Attached Wellhead and Xmas tree Identify any leaking or failed barrier components? Well Type (Function) Reservoir Name Future Well Function within original design basis Additional Notes: Any limitation on acceptable kill and completion fluids ? Original Completion Date Any special monitoring requirements? Any other comments ? Latest Completion Date Well Design Life Operational Limits for Tubing (enter value or NA) Pressure Long String Min/Max Short String Min/Max H2S (ppm) CO2 (mol) 02 (ppb oxygen equivalent) Maximum Injection Pressure (psi) GOR (SCF/bbl) Water cut (%) Reservoir Pressure (psi) Reservoir Temperature (deg C) MWHSITP (psi) Maximum design production rate oil (bpd) Maximum design production/ injection rate gas (MSCFD) Maximum design production/ injection rate water (bpd) Gas lift rate (MSCFD) ESP design rate (BFPD) Operational Limits for Annuli (enter value or NA) MAASP (psi) AOP/ MAWOP (psi) Temperature Fluid flow rates Composition Annulus A Annulus B Annulus C Chemicals Design MINAP (psi) (Gas lift wells) Annulus A Annulus B Annulus C Long String Short String Fluids Fluid Type/cemented Fluid Additives Corrosion inhibitor (Req'd Availability?) Scale Inhibitor (continuous/intermittent) Asphaltene inhibitor (Cont./intermittent) Bacteriocide/Biocide (Cont./Intermitt) pH control additive (Target pH) Oxygen scavenger (Resid O2 concn?) H2S scavenger (Resid H2S concn?) Corrosion protection “SAFE FOR THE FULL LIFE CYCLE” Safe Operating Envelope comes from the design and needs to be maintained through the well life Can be established for all wells, even mature assets its never too late to introduce integrity management. “SAFE FOR THE FULL LIFE CYCLE” Start of well integrity engineering is even before design starts: Define the minimum information needed for the Basis of Design. WELL INTEGRITY – From One Operator “The design, construction, operation and abandonment of the well so as to ensure the flow of fluids through the design path to (or from) the surface, to isolate, where required, underground formations, and to reduce the risk of uncontrolled releases to as low as reasonably practicable (ALARP).” WELL INTEGRITY AWARENESS Compare: “Safety Awareness” is on the immediacy of the current activity or potential scenarios (HAZID, HAZOP…) “Integrity Awareness” is on a far longer term, concerning the sustainability of the equipment to operate safely for the full design life. What is the real meaning and focus of well integrity? When does well integrity start in the well life cycle? What is it worth to my business? Can we really “control” well integrity? Case Histories of iWIT software.on communication of real-time integrity status of wells INTEGRITY TECHNOLOGY Focus: - on integrity in design work (especially in material selection for wells) Plus…. ![]() Case Histories of Life Cycle Well Integrity Management Using iWIT Software SPE London, Nov 29th, 2011 Liane Smith and Ged Lunt, Intetech Ltd.
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