Download - Advanced Well Control - California
Advanced Well Control
Two innovative technologies - seawater injection and polymer plugs with potential to • Reduce probability of an uncontrolled release • Reduce impact of an uncontrolled release relative to
the well capping or relief wells
Objective /Prize
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Well Control Incident
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Prevention Mitigation
Polymer Plugs & Seawater Injection potentially on both sides of bow tie
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Well-Control Bow Tie
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Secondary Packoff Concept (SPC)
Technology Highlights
• Surface or Subsea mounted finite volume fast set resin/catalyst injection (customized to secs)
• Activated with or without riser attached
• Kill well by injecting mud below plug
• Applicable for prevention and mitigation
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Polymer Plug
Shear ramactivated but leaking
ResinCatalyst
Kick detected
Polymer PlugResin/catalyst activated
ResinCatalyst
Polymer PlugFlow stopped and kill weight mud pushed to kill well.
Kill weight drilling fluid
ResinCatalyst
Secondary Packoff Concept (SPC)
• Current Status: • Demonstrated mechanical integrity for up to 20% mud contamination and
piston loads of 15,000psi• Completed tests in a simulated BOP
EXP-1778 tested specimen EXP-1778
untested specimen
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Secondary Packoff Concept (SPC)Dynamic testing at Southwest Research Institute tested development of a plug in a simulated BOP
• Kerosene used as surrogate for drilling mud / reservoir liquids• Scaled flow rates matched residence time of fluids in a BOP with a failed blind shear ram
• 100 second matches a 10 k bbl/day release• 20 seconds matches a 50 k bbl/day release
• Mud temps were 50°C / resin & catalyst at 4°C
Polymer plug formed within the BOP and stopped the flow of drilling mud into Hopper 2
Pilot System
Kerosene
Simulated BOP flowing kerosene
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Seawater Injection concept
Technology Highlights
• Injection of high rate seawater to create sufficient backpressure to allow bullheading of KWM
• Possible use of cement/mud pumps if employed early
• Possible use of surface equipment (e.g Rotating Gas Handler (RGH) to add backpressure (~400psi)
• Dynamic balance of seawater and mud injection during final kill operation
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Seawater Injection
Shear ramactivated but leaking
Kick detected
Seawater InjectionSeawater injection started.
Seawater InjectionKill weight mud displaces seawater to kill well.
SWI: Initial Results• Current Status: Steady state and transient analysis suggest that rig equipment likely
sufficient to handle leak if caught early. Frac pumps available for larger leaks.
• Next phase: Model dynamics of well kill operation, Erosion of blind shear ram (BSR), early kick detection measurement technologies
Transient Analysis (Add Energy)
Steady State Analysis (URC)
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Forward Plans• Complete feasibility studies
• Polymer plug formation under dynamic conditions and high pressure
• Promote Industry Interest• SPE ATCE 2017 paper describing polymer plugs (Paper 187318)• Submit peer-reviewed publications
• Second phase feasibility of polymers plugs• Dynamic modeling of seawater injection
• Establish Industry Participation• Form JIP to fund and mature concept
• OOC agreed to promote and administer• Interest from Chevron, BP, HWCG, DOE, BSEE
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JIP Funded Research PlanPhased approachPhase 3 ($2M/year for 2 years; 8 partners; $250K/year)• Evaluate erosion potential• Evaluate operational challenges• Develop detailed designs• Define modifications to well-control protocols• Conduct scaled dynamic testing at pressure / temperature
Phase 4 ($5-$10M) – if needed• Conduct field testing at full scale using an oil surrogate
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Questions?
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