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© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®
Objectives for
A
Basic Gas Lift Seminar
Objectives for
A
Basic Gas Lift Seminar
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas lift Workshop
HISTORY
-WALS HAS CONDUCTED SEMINARS FOR MANY
YEARS
-BASIC FORMAT BY TOM RYAN (MACCO)
-EXPANDED AND IMPROVED UPON
-ORIGINALLY A ONE WEEK SEMINAR
-REDUCED TO THREE DAYS AT CUSTOMERS
REQUEST
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
SEMINAR TYPES
TECHNICAL SESSION THAT INCLUDES
THEORY
EVALUATION
GRAPHICAL DESIGN
TROUBLESHOOTING
VALVE MECHANICS
PRACTICAL SESSIONS
ADVANCED GAS LIFT COURSES
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
CURRENTLY
-SCHEDULE FOUR DOMESTIC PER YEAR
-IN-HOUSE TRAINING ON REQUEST
-INTERNATIONALLY BY REQUEST
-TWO INSTRUCTORS AT ALL TIMES
-OVER 100 PARTICIPANTS PER YEAR
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
PURPOSE
TO FAMILIARIZE CURRENT AND POTENTIAL
CUSTOMER WITH THE APPLICATION OF GAS LIFT
TO IMPROVE THE KNOWLEDGE AND PROFICIENCY OF
GAS LIFT COMPANY PERSONNEL
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
SCOPE
THE SEMINARS ARE DESIGNED TO FAMILIARIZE THE
PARTICIPANT WITH GAS LIFT APPLICATION AND
OPERATING PRINCIPLES WHILE EMPHASIZING THE
EFFECTS BETWEEN THE GAS LIFT AND THE
PRODUCING SYSTEM
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
COURSE ORGANIZATION
ULTIMATE GOAL SET FOR PARTICIPANTS IS
TO LIFT AS DEEP AS POSSIBLE WITHIN THE
CONSTRAINTS OF THE SYSTEM
USING OTHER OBJECTIVES AND CLASS
PROBLEMS,WE WORK TOWARD THAT GOAL
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
VISUAL AIDS USED DURING SEMINAR
PowerPoint
WELL MODEL
EQUIPMENT CUTAWAYS
ANIMATIONS
SOFTWARE
WEM, VALCAL, VPC
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
OBJECTIVES
FIRST, WE DEFINE THE DIFFERENT APPLICATIONS OF GAS LIFT AS USED IN
CONTINUOUS FLOW
INTERMITTENT FLOW
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
OBJECTIVES
DEFINE AND DISCUSS THE AREAS OF THE
PRODUCTION SYSTEM THAT REQUIRE PROFILING
DISCUSS THE TOOLS AVAILABLE TO
ACCOMPLISH THE TASK AND THEIR LIMITATIONS
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
THREE AREAS TO DEFINE
RESERVOIR
VERTICAL
HORIZONTAL
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®PRODUCTIVITY INDEX
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®
INFLOW PERFORMANCE RELATIONSHIP
VOGEL
SBHP
F.E. = 1.0
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®
MULTIPHASE FLOWING GRADIENTS
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Multiphase Flowing Gradients
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®VERTICAL PERFORMANCE
VERTICAL FLOW CORRELATIONS :
SHOULD BE SELECTED BASED ON COMPARISON WITH ACTUAL MEASURED DATA.
WHEN NOT AVAILABLE, SELECT DATA FROM A WELL PRODUCING UNDER SIMILAR CONDITIONS.
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
OBJECTIVES
APPLY PROCEDURES USED FOR EVALUATING
POTENTIAL OIL WELLS FOR THE
APPLICATION OF GAS LIFT
USE “HANDS ON” GRAPHICAL DESIGN AND
VERIFY WITH SOFTWARE
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®
WELLHEAD PRESSURE VS. PRODUCTION
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®EFFECT OF OPERATING DIFFERENTIAL
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®WELL EVALUATION4 8 12 16
1
2
3
4
5
6
7 200 dP
600 BFD400:1 IGLR
INDICATED POI
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®WELL EVALUATION
4 8 12 16
1
2
3
4
5
6
7 200 dP
800 BFD400:1 IGLR
INDICATED POI
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®WELL EVALUATION4 8 12 16
1
2
3
4
5
6
7 200 dP
1000 BFD400:1 IGLR
INDICATED POI
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
OBJECTIVES
DEMONSTRATE CONTINUOUS GAS LIFT DESIGN
METHODS FOR IPO AND PPO VALVES
DESIGNS ARE ACCOMPLISHED WITH “HANDS
ON” METHOD AND VERIFIED WITH SOFTWARE
CURRENT AND FUTURE CONDITIONS
CONSIDERED AS WELL AS MINIMUM DATA
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Valve Spacing
Formation Grad
Injection Pressure
Gradient above the point of injection Differential reference line
10% error toleranceabove and below indicated POI
Indicated POI
Transfer tubing pressure
Valve #1
Valve #2
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®
CONTINUOUS FLOW GAS LIFT DESIGN
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Current and Future Conditions
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
OBJECTIVE
EXAMINE THE MECHANICS OF IPO AND PPO
G.L.V.’S AND THEIR GAS PASSAGE
CAPABILITIES AS PER VPC
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®
PRESSURE VALVEFORCE BALANCE EQUATION
PO (AB-AP) + PT (AP) = PVC (AB)
POAB -POAP + PT (AP) = PVC (AB)
POAB - POAP + PTAP = PVC AB AB AB AB AB
PO - PO AP + PT AP = PVC AB AB
PO ( 1 - R) + PTR = PVC
PO = PVC - PTR 1 - R
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Typical Loadrate Test Data
0 0.01 0.02 0.03 0.04 0.05 0.06720
740
760
780
800
820
840
860
880
Stem Travel (inch)
Test Pressure (Psig)
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
OBJECTIVE
PRESENT AND DISCUSS SOME OF THE
AVAILABLE TOOLS FOR EVALUATING OR
TROUBLE SHOOTING GAS LIFT INSTALLATIONS
DISCUSS ADVANTAGES AND LIMITATIONS
DISCUSS CORRECT METHODS OF USE
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®
© Weathe rfor d. All r ights r eserved .
ARTIFICIAL LIFT SYSTEMS
®
Gas Li ft Diagnostics
TroubleshootingAreas where problems can exist
• Inlet• Outlet• Sub-surface
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®
© Weathe rfor d. All r ights r eserved .
ARTIFICIAL LIFT SYSTEMS
®
Gas Li ft Diagnostics
TroubleshootingDiagnostic Tools
Wireline-tagging fluid/check perfs for fillEchometerWell Tests-performed properlyInjection Gas Measurement- in and outTwo or Three Pen Charts- every wellPressure/Temperature Surveys- performed properly
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
OBJECTIVE
DISCUSS CURRENT METHODS AND PROCEDURES
BEING USED FOR OPTIMIZING GAS LIFT
OPERATIONS
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
BENEFITSPARTICIPANTS REALIZATION OF THE VALUE OF
QUALITY DATA FOR OPTIMIZING THE APPLICATION
BEFORE AND AFTER INSTALLATION
REALIZATION THAT THE EFFICIENCY OF THE SYSTEM IS
IMPROVED AND TROUBLESHOOING MINIMIZED WITH
THE PROPER APPLICATION OF THE GAS LIFT EQUIPMENT
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
BENEFITSPARTICIPANTS FROM MANY DIFFERENT AREAS
EXCHANGE IDEAS FOR REMEDIES TO PRODUCTION
PROBLEMS
MOST IMPORTANT, WE BECOME MORE AWARE OF THE
PROBLEMS AND NEEDS OF OUR CUSTOMERS AND OUR
INDUSTRY
© Weatherford. All rights reserved.
ARTIFICIAL LIFT SYSTEMS
®Gas Lift Workshop
THANK YOU VERY MUCH
FOR
YOUR ATTENTION