© weatherford. all rights reserved. artificial lift systems ® objectives for a basic gas lift...

© Weatherford. All rights reserved.

ARTIFICIAL LIFT SYSTEMS

®

Objectives for

A

Basic Gas Lift Seminar

Objectives for

A

Basic Gas Lift Seminar



®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



®Gas Lift Workshop

SEMINAR TYPES

TECHNICAL SESSION THAT INCLUDES

THEORY

EVALUATION

GRAPHICAL DESIGN

TROUBLESHOOTING

VALVE MECHANICS

PRACTICAL SESSIONS

ADVANCED GAS LIFT COURSES



®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



®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



®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



®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



®Gas Lift Workshop

VISUAL AIDS USED DURING SEMINAR

PowerPoint

WELL MODEL

EQUIPMENT CUTAWAYS

ANIMATIONS

SOFTWARE

WEM, VALCAL, VPC



®Gas Lift Workshop

OBJECTIVES

FIRST, WE DEFINE THE DIFFERENT APPLICATIONS OF GAS LIFT AS USED IN

CONTINUOUS FLOW

INTERMITTENT FLOW



®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



®



®Gas Lift Workshop

THREE AREAS TO DEFINE

RESERVOIR

VERTICAL

HORIZONTAL



®PRODUCTIVITY INDEX



®

INFLOW PERFORMANCE RELATIONSHIP

VOGEL

SBHP

F.E. = 1.0



®

MULTIPHASE FLOWING GRADIENTS



®Multiphase Flowing Gradients



®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.



®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



®

WELLHEAD PRESSURE VS. PRODUCTION



®EFFECT OF OPERATING DIFFERENTIAL



®WELL EVALUATION4 8 12 16

1

2

3

4

5

6

7 200 dP

600 BFD400:1 IGLR

INDICATED POI



®WELL EVALUATION

4 8 12 16

1

2

3

4

5

6

7 200 dP

800 BFD400:1 IGLR

INDICATED POI



®WELL EVALUATION4 8 12 16

1

2

3

4

5

6

7 200 dP

1000 BFD400:1 IGLR

INDICATED POI



®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



®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



®

CONTINUOUS FLOW GAS LIFT DESIGN



®Current and Future Conditions



®Gas Lift Workshop

OBJECTIVE

EXAMINE THE MECHANICS OF IPO AND PPO

G.L.V.’S AND THEIR GAS PASSAGE

CAPABILITIES AS PER VPC



®

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



®Gas Lift Workshop



®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)



®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



®

© Weathe rfor d. All r ights r eserved .


®

Gas Li ft Diagnostics

TroubleshootingAreas where problems can exist

• Inlet• Outlet• Sub-surface



®

© Weathe rfor d. All r ights r eserved .


®

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



®Gas Lift Workshop

OBJECTIVE

DISCUSS CURRENT METHODS AND PROCEDURES

BEING USED FOR OPTIMIZING GAS LIFT

OPERATIONS



®



®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



®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



®Gas Lift Workshop

THANK YOU VERY MUCH

FOR

YOUR ATTENTION

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