EGLV – E LECTRIC G AS L IFT V ALVE (Field Trial at S181) - THE OPERATOR’S PERSPECTIVE

EGLV – EGLV – EELECTRIC LECTRIC GGAS AS LLIFT IFT VVALVEALVE(Field Trial at S181)(Field Trial at S181)

- THE OPERATOR’S PERSPECTIVE- THE OPERATOR’S PERSPECTIVE

KeywordsKeywords

Cable-less.Cable-less.

Electrically actuated.Electrically actuated.

Variable lift gas rate.Variable lift gas rate.

Remote monitoring and control.Remote monitoring and control.

Wireline/Slickline-less.Wireline/Slickline-less.

EGLV’s Field Trial at S181 - BackgroundEGLV’s Field Trial at S181 - Background

Installed in Dec’ 2002 with 2 pods.Installed in Dec’ 2002 with 2 pods.

Bottom pod failed in Apr’ 2003. Top Bottom pod failed in Apr’ 2003. Top pod remain pod remain operational.operational.

Reason of failure – communication Reason of failure – communication modem.modem.

Workover completed in Jul’ 2003. 3 Workover completed in Jul’ 2003. 3 pods were pods were installed.installed.

Gas Lift Optimization Cycle - ConventionalGas Lift Optimization Cycle - Conventional

Takes 2 to 4 months (resource-dependent) to realize Takes 2 to 4 months (resource-dependent) to realize optimization opportunities if wireline entry is involvedoptimization opportunities if wireline entry is involved

Gather Gather DataData- FTSFTS- Well Well teststests- othersothers

Gas Lift RedesignGas Lift Redesign- Optimum Injection Optimum Injection DepthDepth- Optimum Lift Gas Optimum Lift Gas RateRate

Wireline entryWireline entry

Surface GL controlSurface GL control- optimize set point- optimize set point

Q vs. IQ vs. ICalibrateCalibrateWinGLUEWinGLUE

modelmodel

EGLV ‘s Graphical User Interface - WonderwareEGLV ‘s Graphical User Interface - Wonderware

TRENDING – PARAMETERS vs.TIMETRENDING – PARAMETERS vs.TIMEEGLV - UNLOADINGEGLV - UNLOADING

EGLV - ORIFICEEGLV - ORIFICEEGLV CONTROLEGLV CONTROL

S181 – Successfully unloaded using WonderwareS181 – Successfully unloaded using Wonderware

Tubing press at unloading depth (POD 2)Tubing press at unloading depth (POD 2)

Tubing press at orifice depth (POD 1)Tubing press at orifice depth (POD 1)Annulus press at orifice depth (POD 1)Annulus press at orifice depth (POD 1)

% valve open at orifice depth (POD 1)% valve open at orifice depth (POD 1)

S181 – Gas lift optimizationS181 – Gas lift optimization

Gas lift flowGas lift flow

Tubing press at orifice depth (POD 1)Tubing press at orifice depth (POD 1)

Tubing press at unloading depth (POD 2)Tubing press at unloading depth (POD 2)

Gas Lift has no Gas Lift has no benefitbenefit

S181 – Gas Lift OptimizationS181 – Gas Lift Optimization

EGLV uses EGLV uses FBHP vs. gaslift rateFBHP vs. gaslift rate instead of instead of Oil Rate vs. gaslift rateOil Rate vs. gaslift rate

% open/gaslift rate

FB

HP

% open/gaslift rate

OIL

RA

TE

Gas Lift Optimization Cycle - EGLVGas Lift Optimization Cycle - EGLV

Gather Gather DataData- FTSFTS- Well Well teststests- othersothers

Gas Lift RedesignGas Lift Redesign- Optimum Injection Optimum Injection DepthDepth- Optimum Lift Gas Optimum Lift Gas RateRate

Wireline entryWireline entry

EGLV controlEGLV control- optimize % valve open- optimize % valve open

Q vs. IQ vs. ICalibrateCalibrateWinGLUEWinGLUE

modelmodel

Near instantaneous optimization of a gas Near instantaneous optimization of a gas lifted well !!lifted well !!

Other implications to the gas-lift operatorOther implications to the gas-lift operator

Multi-point injection may be a thing of the past.Multi-point injection may be a thing of the past.

Injection pressure is utilized to the maximum.Injection pressure is utilized to the maximum.

A wide range of lift gas rate is at the operator’s disposal.A wide range of lift gas rate is at the operator’s disposal.

High well deviation is not a factor in spacing of mandrels.High well deviation is not a factor in spacing of mandrels.

In the pipelineIn the pipeline

Refine GUI to facilitate monitoring and optimizationRefine GUI to facilitate monitoring and optimization

Develop a control algorithm to optimize a EGLV well Develop a control algorithm to optimize a EGLV well automatically (synergy with the Production Universe team).automatically (synergy with the Production Universe team).

BACK-UP SLIDESBACK-UP SLIDES

How does an EGLV work ?How does an EGLV work ?

Electro-magnetic Electro-magnetic principleprinciple

Bi-directionalBi-directional

Communication up/down Communication up/down casingcasing

Using gas filled annulus Using gas filled annulus for electrical isolationfor electrical isolation

P/T based on strain P/T based on strain gaugesgauges

VMonitor link to officeVMonitor link to office

VMonitor

S-181~

2 upper pods with"unloading valve"

lower pod with"variable orifice"

electrical choke

EGLV completion equipmentEGLV completion equipment

EGLV completion equipment EGLV completion equipment

S181 Well Schematic S181 Well Schematic FINAL WELL COMPLETION DIAGRAM WELL No : S 181 STI

Location E14 Wellhead Remarks

Field SERIA Tubing head spool 11"x71/16" 3K Install the EGLM(Electric Gas Lift Mandrel) with 31/2" 9.2#NVAM Tubing

Rig : JO-I X/tree 71/16" x 31/8" 3 K and 27/8" SSD and 23/8" XN Nipple.

Date Spudded ST1(22/4/70)

Date RecompletedJULY 4-2003 casing

Max Inclination 3.5 DEG@721mah 13.3/8" Casing 61#

Packer Fluid 9.5/8"Casing 36#

Derrick Floor Elevation 9.79 M 4.1/2" Liner 11.6#

STATUS OD

(")

ID

(")

DESCRIPTION TVD

(m)

OBDF

(m)

BTHF

(m)

BTHF

(m)

OBDF

(m)

TVD

(m)

DESCRIPTION OD

(")

ID

(")

13.3/8" 126.8

TOC (TS) 414.6

523.1 533 31/2" EL.GLM 5.60 2.992

580.0 590 31/2" EL.GLM 5.60 2.992

602.0 612 31/2" EL.GLM 5.60 2.992

X/O 31/2vamboxx27/8vampin

614.0 623.8 27/8" SSD 3.800 2.313

X/O 27/8vamboxx31/2vampin

622.6 632.4 9.5/8" RH Packer 8.650 2.735

Top of window (9.5/8") 655.3

629.3 639.1 X/O 31/2vamboxx27/8vampin

3.94 2.440