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Pump-Off Controllers

Pump-Off Controllers. Chris Patterson Production Group Athabasca Oil Sub Business Unit Canadian Foothills & Frontier Region August 23, 2004. Pump-Off Controllers. Agenda. Pelican Lake Overview Theory of Pumped-Off Current Well Optimization Techniques What are Pump-Off Controllers?

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Pump-Off Controllers

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  1. Pump-Off Controllers Chris Patterson Production Group Athabasca Oil Sub Business Unit Canadian Foothills & Frontier Region August 23, 2004

  2. Pump-Off Controllers Agenda • Pelican Lake Overview • Theory of Pumped-Off • Current Well Optimization Techniques • What are Pump-Off Controllers? • Results from Pump-Off Controller Test • Economic Evaluation • Recommendations

  3. Pump-Off Controllers Pelican Lake Oil • 500 Producing Horizontal • Wells • 22,000 Barrels/Day (Heavy Oil) • Secondary Recovery – • Waterflood • 180 Water Injectors

  4. Pump-Off Controllers What is Pumped Off? Darcy’s Eqn Flow αΔP

  5. Pump-Off Controllers Current Well Optimization Technique Fluid Shot -> Change Speed -> Fluid Shot -> Change Speed Echo Meter Fluid Gun

  6. Pump-Off Controllers Calling to Change Speed Control Room: Please speed up from 100 to 130 rpm

  7. Pump-Off Controllers Current Optimization Techniques

  8. Pump-Off Controllers Project Scope • Researched potential vendors with pump-off controllers. • Installed 8 Pump-Off Controllers from 4 vendors and ran trials – No cost to EnCana. • Reviewed results. • Obtained formal quotes c/w installation costs. • Recommended pump-off controller strategy with economic justification.

  9. Pump-Off Controllers Vendor/Controllers Evaluated: Pump-Off Controller Units • StellarTech • Grizzly Electric • Lufkin Automation VFD Pump-Off Controllers (Software Upload) • Wermac Electric

  10. Pump-Off Controllers What we currently have Wermac Variable Frequency Drive Top Drive SCADA

  11. Pump-Off Controllers Where the Pump-Off Controller Fits In Wermac VFD Top Drive Controller SCADA Flow Sensor

  12. Pump-Off Controllers VFD Pump-Off Controllers Wermac VFD SCADA Top Drive Software Upload Wermac Flow Sensor

  13. Pump-Off Controllers Test Results • StellarTech – Controller unsuited for application. • Grizzly Electric – 15% increase in production. Controller algorithm requires further modification. • Lufkin Automation – Initial install problems. Just installed (no data). • Wermac Electric – 28% increase in production. Best overall Pump-Off Controller.

  14. Pump-Off Controllers Controller Evaluation – Wermac • Operator’s are familiar with Wermac VFD’s. • No need for physical controller. • No cost for software. • Controller algorithm is robust and versatile. • Proven in Pelican Lake field trials. • Good customer service and technical help.

  15. Pump-Off Controllers Results – Controller Off RPM Floco Flow (m^3/day) Accumulated Volume (m^3) Average Production: 41 m^3/day

  16. Pump-Off Controllers Results – Controller On RPM Thermal Flow % Floco Flow (m^3/day) Accumulated Volume (m^3) Average Production: 52.5 m^3/day 28% Increase in Production

  17. Pump-Off Controllers Economic Results: • NPV After Tax @ 9%: 68 M$ • After Tax ROR: 100% • Payout Period: 7.1 months • PIR @ 9%: 3.92 M$/M$ All EnCana economic hurdles met and exceeded!

  18. Pump-Off Controllers Pump-Off Controllers:

  19. Pump-Off Controllers Recommendations: • Continue testing of controllers. • Install Wermac controllers on new infill pad under primary production (Pad NE-65) – in progress. • Include funds in 2005 Capital Budget for Wermac pump-off control – accepted. • Test using existing floco meter to replace thermal flow sensor.

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