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LAFAYETTE, LA NEW ORLEANS, LA HOUSTON, TX

LAFAYETTE, LA NEW ORLEANS, LA HOUSTON, TX. PRODUCTION OPTIMIZATION UTILIZING BALANCED PORTED VALVES. DESIGN PROCESS DATA ACQUISITION CORRELATION MATCH SYSTEMS MATCH PROJECTIONS VALVE SELECTION. DESIGN INFORMATION. COMPANY _ SOUTH LOUISIANA_____

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LAFAYETTE, LA NEW ORLEANS, LA HOUSTON, TX

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  1. LAFAYETTE, LA NEW ORLEANS, LA HOUSTON, TX

  2. PRODUCTION OPTIMIZATION UTILIZING BALANCED PORTED VALVES • DESIGN PROCESS • DATA ACQUISITION • CORRELATION MATCH • SYSTEMS MATCH • PROJECTIONS • VALVE SELECTION

  3. DESIGN INFORMATION COMPANY _SOUTH LOUISIANA_____ LEASE _INLAND WATERS ____ WELL No. _1___________________ FIELD _MARSH______________ GAS PRESSURE: KICKOFF _880___ psi GAS PRESSURE: OPERATING _850___ psi TUBING BACK PRESSURE _150___ psi BOTTOM HOLE PRESSURE _1500__ psi WATER FLOOD MAX 3500# TUBING DATA _ 2_3/8” _ 4.7 #_ SURFACE STATIC TEMPERATURE _75 ˚F CASING DATA _7 5/8”__ _33.7#__ SURFACE FLOWING TEMPERATURE _110__ ˚F I.G SPEC GRAVITY _.65____ BOTTOM HOLE TEMPERATURE _227__ ˚F PROJECTED RATE _206___ bfpd % H2O _10____ % PERFORATIONS GOR _100___ scf/bbl _12850_ - _12950_ ft - MD PI _2.50___ bbls/day/psi _12700_ - _12793_ ft - TVD GRAVITY: OIL _32____ ˚ API GRAVITY: WATER _1.07___ COMP. FLUID GRAD _.465___ psi/ft LONG STRING OF DUAL WELL

  4. BPV IPO

  5. KO 880 Op 850 BFPD 338 BOPD 85 INJ 500 SBHP 3500 BFPD 206 BOPD 206 INJ 500 SBHP 1500

  6. TUBING AND CASING PRESSURE CHART

  7. PROCESS DATA ACQUISITION SYSTEM ANALYSIS VALVE SELECTION

  8. PROPERLY GATHERED PRESSURE AND WELL TEST DATA ARE A MUST FOR ACCURATE MODELING RESULTS. LOGGING IN HOLE 100’ PER MINUTE (TLS) INJECTION POINT

  9. IDENTIFICATION OF BEST FIT CORRELATION TO EMPIRICAL PRESSURE AND WELL TEST DATA CHOKSHI, SCHMIDT & DOTY

  10. VALVE MECHANICS Pd = (Pc) (1-R) + (Pt) (R) Pd = (Pc) (1-R) + (Pt) (R) Pd DOME Pd Pc CASING Pc GAS INLET CHOKE Pc GAS INLET PORT PORT Pt Pt TUBING BALANCE PORTED IPO Pd Pc Pt

  11. VALVE MECHANICS (Pd) (Ab) = (Pc) (Ab) Pd = Pc Pd = (Pc) (1-R) + (Pt) (R) Pd DOME Pd Pc CASING Pc GAS INLET CHOKE GAS INLET Pt PORT PORT Pt Pt TUBING BALANCE PORTED IPO

  12. VALVE MECHANICS Pd = (Pc) (1-R) + (Pt) (R) Pd = (Pc) (1-R) + (Pt) (R) Pd DOME Pd Pc Pc CASING GAS INLET CHOKE Pc Pt PORT Pt Pt TUBING BALANCE PORTED Pd Pc GAS INLET CHOKE Pt PORT Pt CLOSED OPEN

  13. BALANCE PORTED VALVE ADVANTAGES • MAXIMUM INJECTION PRESSURE - OPTIMUM DEPTH OF INJECTION. • EFFICIENT AND PREDICTABLE GAS PASSAGE -THROUGH UPSTREAM CHOKE. • MINIMIZES EROSION OF SEAT AREA -PRESSURE DROP TAKEN ACROSS UPSTREAM CHOKE. • REDUCES FREEZING - MINIMUM Dp ACROSS SURFACE INJECTION GAS CHOKE. • NO PRESSURE DROP - VALVE IDEAL FOR DUAL GAS LIFT WELLS.

  14. CONCLUSIONS • WELL LIFTING AT DEEPEST POSSIBLE POINT AT PRESENT INJECTION GAS RATE. • BALANCE PORTED TYPE VALVE ALLOWS WELL TO UNLOAD AND PRODUCE AT OPTIMUM RATE WITH INITIAL DESIGN AND SINGLE POINT INJECTION. • COULD NOT BE ACHIEVED WITH IPO OR PPO VALVES WITH INITIAL DESIGN. • $51,000 MONTHLY REVENUE INCREASE REALIZED FROM UTILIZATION OF BALANCE PORTED GAS LIFT VALVES ($19.00/BBL).

  15. ACKNOWLEDGEMENT ORGANIZERS OF 2002 ASME/API GAS-LIFT WORKSHOP

  16. PRODUCTION OPTIMIZATION UTILIZING BALANCED PORTED VALVES Prepared by Altec sales group for ASME Gas Lift Workshop, February 6, 2002 Abstract With most current production and artificial lift modeling programs, it is possible to compare properly gathered empirical pressure and well test data with calculated correlations. It is important that a wide selection of calculated correlations be available for comparison so that best correlation for user conditions and parameters can be identified. Once the correct correlation is identified, results will mimic existing conditions. Subsequent sensitivity simulations will produce accurate projections as to how the well will respond to facility revisions, reservoir stimulation or artificial lift revisions. When Gas Lift is the means of artificial lift, the choices for equipment types are usually limited to injection pressure operated valves, producing pressure operated valves and a small selection of other type valves. In many cases, the user is not aware of the advantages of other type valves and does not consider them in evaluating the maximum potential. One such type valve is the balance ported valve. Balance ported valves are ported and choked so that opening and closing forces are equal. This is accomplished by preventing the ball stem’s seating area from sensing casing pressure when the valve is in the open position. Balance ported valves have been in service for many years under several different trade names and porting configurations. Altec Gas Lift Inc. has ran thousands of one such type valve since 1984, the Constant Flow(R) Valve protected under U.S. Patent No. 4,625,941. This presentation will cover a project that illustrates the advantages of proper modeling techniques and utilization of balance ported valves.

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