deliquification & revival of oil and gas wells … · using surface jet pumps recent...

DELIQUIFICATION & REVIVAL

OF OIL AND GAS WELLS

USING SURFACE JET PUMPS

Recent applications and experience

8th European Conference on Gas Well De-liquification Groningen, 2013

By: Sacha Sarshar ,Caltec

CONTENTS;

• CAUSES OF LIQUID LOADING

• CHARACTISTICS OF FLOW THROUGH WELL BORE-FLOW

REGIME MAP

• SOLUTIONS TO DELIQUIFY OIL OR GAS WELLS

• IMPACT OF REDUCING THE FWHP

• INTRODUCTION TO SURFACE JET PUMP (SJP)

• PERFORMANCE OF JET PUMP

• EFFECT OF LIQUIDS IN LP AND HP GAS, AND HOW TO

COPE WITH IT

• BEST LOCATION FOR SJPS,ONSHORE AND OFFSHORE

• OPERATION AND CONTROL/INSTRUMENTATION

• HOW TO ASSESS THE PERFORMANCE OF THE SJP

Slide 2

CONTENTS CONTINUED....

• HOW TO COPE WITH CHANGES IN HP OR LP PRODUCTION

AND FLOW RATES

• HOW TO PREDICT PRODUCTION RATE AND INCREASE IN

PRODUCTION

• DESIGN ISSUES; CODES,MATERIAL

• OPERATION ISSUES; -

NOISE,TEMPERATURE,EROSION,CORROSION

• FIELD EXAMPLES

• ECONOMICS

• QUESTIONS AND ANSWERS

Slide 3

EFFECT OF FIELD DEPLETION ON WELL BORE PRESSURE

Inflow Parameters will change as the field depletes and the shape of the inflow performance curve will change, potentially due to factors like:

Changes in relative permeabilities over time Increase in water production

Reservoir compaction Closure of natural fractures

Production below saturation pressures

Gas is released from oil resulting an increase of GOR

Condensate is dropping in the reservoir resulting a decrease of LGR – condensate banking.

Slide 4

Effect of field depletion on well bore pressure and production

Increase of Non Darcy effect due to added turbulence

Increase of effective stress (difference between the overburden

and fluid pressures)

Closure of near well bore micro fractures

Closure of induced fractures

(fracture conductivity reduction)

Near wellbore damage

Fines migration build-up , Screen plugging

Sand production and build-up in well sump

Scale build-up / salt deposition

Slide 5

WELL FLOW PERFORMANCE PARAMETERS

• The well inflow rate is driven by:

Reservoir pressure/pressure maintenance

Well mechanical constraints (solid production, erosion,

completion envelope, screen integrity, water / gas coning

Back pressure on well (FWHP &FBHP)

Flow regime within the well bore

Phase envelope

Mechanical skin (near wellbore damage, perforation skin,

partial penetration skin, completion skin, sand control

Non Darcy skin

Well architecture ( tubing size, well depth, profile ...)

Facilities constraints (e.g. Water production capacity)

Slide 6

MAIN CAUSES OF LIQUID BUILD UP IN WELLS

• Low velocity of gas

• High FWHP, dictated by downstream process system

• Multiphase flow through well bore , leads to flow regimes

such as Churn flow, slugging etc,which affect both the

hydrostatic head and frictional losses

• Effect of viscosity& density of liquids and gas

• Inclined & horizontal profile of wells contribute to G-L

separation within the well bore and generation of slugs;

• liquid build up in pipelines could also aggravate the

problem ,increasing FWHP

• The flowing bottom hole pressure(FBHP) is the main factor

affecting production, but FWHP is also a useful guide

Slide 7

COMPARISON OF

FLOW REGIMES IN

HORIZONTAL AND

VERTICAL PIPES

Intermittent

Dispersed Bubble

Annular Mist

Wavy

Stratified

Superficial Gas Velocity (m/s)

Su

perf

icia

l L

iqu

id

Velo

cit

y (

m/s

)

Slug

Annular Mist

Froth

Bubble

Su

perf

icia

l L

iqu

id

Velo

cit

y (

m/s

)

V ≥ 5 m/s

Slide 8

TYPICAL INSTANTANIOUS FLOW REGIME

ASSOCIATED WITH MULTIPHASE FLOW

3

Slide 9

SEVERITY AND EXTENT OF LIQUID BUILD-UP

HOW SICK IS THE PATIENT?! • CASES WHEN LOWERING THE FWHP OR REGULAR SHUT-

DOWN IS SUFFICIENT TO REVIVE THE WELL- EFFECTIVENESS

AT WHAT FWHP/ FBHP?

• CASES WHEN AN INITIAL DELIQUIFICATION IS NEEDED

,FOLLOWED BY OPERATION UNDER A LOWER FWHP ,USING

SURFACE JET PUMPS

- SEVERAL OPTIONS EXIST FOR THE INITIAL

DELIQUIFICATION SUCH AS USE OF FOAMING AGENTS OR

USE OF DOWNHOLE SYSTEMS.

• CASES WHERE A DOWNHOLE SYSTEM /SOLUTION IS

NEEDED,BUT REDUCING FWHP WILL ENHACE PRODUCTION

Slide 10

SELECTION OF SUITABLE SOLUTION DEPENDS ON;

• SEVERITY OF LIQUID LOADING

• RESERVOIR PRESSURE

• WELL INFLOW CHARACTERISTICS

• AVAILABILITY OF HP FLUIDS IF SJP IS USED

• PLATFORM OR SITE CONSTRAINTS

• ECNOMICS

Use of surface jet pumps is the simplest technique,

provided there is sufficient source of motive flow

Slide 11

SELECTION PROCESS FOR WELL DELIQUIFICATION

Case1(Mild) Case 2(Medium) Case 3 (Sever)

Slide 12

Lowering the

FWHP by SJP is

sufficient

Well loaded, initial

offloading is needed

Lower FWHP by SJP

After initial offloading

Use SJP plus

intermittent

offloading

Downhole system needed

SJP could enhance downhole system

COMMON REMEDIAL SOLUTIONS TO WELL DE-IQUIFICATION

• Regular gas blow down to atmosphere

• Lower flowing wellhead pressure ( use of jet pump

technology or other methods)

• Well shut-in Intermittently

• Use of foaming agents/intermittent or continuous

• Tubing size modification/velocity string

• Artificial lift systems (Downhole) including downhole jet

pumps

• Best solution is dictated by well status,resevoir

characteristics, available source of energy, platform

constraints and economic consideration

Slide 13

INTRODUCTION TO SURFACE JET PUMPS

Slide 14

Surface Jet Pump Technology

Some possible HP sources-;

- HP WELLS (oil or gas wells) - COMPRESSOR RECYCLED GAS

- HP GAS FROM PROCESS SYSTEM - A SINGLE PHASE (LIQUID) PUMP

- HP LIQUID(OIL,WATER)

Removable

Nozzle

Removable

Mixing tube /Diffuser

Patented Universal Design Ejector / Jet Pump

Slide 15

HP Flow

LP Flow

Combined Flow

Ve

loc

ity

Pre

ss

ure

1 3 4 5 6 7 2 8

HP

LP

Discharge

Nozzle Mixing tube Diffuser

Jet Pump Flow Dynamics

16

MAIN FACTORS AFFECTING THE PERFORMANCE

~ HP/LP PRESSURE RATIO

~ HP/LP FLOW RATIO

~ GAS/LIQUID RATIO(LP FLOW)

(oil or gas production cases)

Secondary

factors;

- Mol. weight

- Temperature

- Liquid in gas

phase

Slide 17

EFFECT OF LIQUIDS PRESENT IN LP GAS

18

Gas as the motive flow

MULTIPHASE CHOKING IN JET PUMP :

A CRITICAL FACTOR NOT COMMONLY KNOWN

Slide 19

TYPES AND RANGES OF SJP APPLICATIONS

• Revival of dead wells (oil&gas wells)/ de-liquification

• Boost production from oil or gas wells

• Boost pressure of LP gas in a process system

• De-bottleneck compressors

• Eliminate intermediate compressors

• Prevent HP wells impose back pressure on LP wells

• Prevent flaring LP gas

• Others to meet process requirements

Slide 20

SOME FIELD EXAMPLES

Slide 21

WELL REVIVAL –SPILAMBERTO FIELD,ITALY

Source of HP flow; HP gas well

Benefits;

Gain in gas production by 23,000

sm3/d (0.812MMscfd)For almost

two years

Slide 22

BP Inde, UKCS

Benefits

Used 68 MMscfd of gas from LP Shell

wells into the exiting facilities.

Production increased by 25%

Increased intake capacity of

compressor

De- bottlenecked exiting compressor

Removed liquids from LP wells and

the pipeline

Solution ; Used HP recycled gas to power

SJP, to draw-in low pressure satellite Shell

wells

Low Pressure

Gas Wells

Jet Pump

Export

Kilo

Juliet

Subsea Line

Davy Line

Bessemer

Dp

Separator

Compressor

Award winning solution

Slide 23

Chevron, USA (GOM)

Solution ; HP gas from the existing compressor

on recycle used to power the jet pump

Benefits

Lowered arrival p at the platform by 200 psi

Increased gas velocity and improved flow regime

in wells

• Removed bulk of liquids in the pipeline, causing

a further 140psi drop at the wellhead

(340 psi total pressure drop).

• Production increased by 24%.

• 2.5 Bscf of otherwise lost reserves recovered.

•Flow delivered at higher pressure to compressor

suction increased compressor throughput.

Export 40MMSCFD

7.4 MMSCFD 850 psig

400 psig 200 psig

Ejector 1250 psig

Sales

Sub sea

manifold

Recycle gas

GEMINI

process

(Php/Plp=4.9.Qhp/Qlp= 2.11,Pd/Plp=2 )

Slide 24

27 miles

HP Well

LP Well

15 km

Pipeline

Drying

unit

Compressor

At eductor:

Pressure ratio HP/LP = 5

Flow ratio HP/LP = 3

Gas liquid ratio (m3 liquid per 1 million m3 gas)

HP well 65

LP well 30

Caltec

Jet Pump

Groet field surface jet pump

Slide 25

HP Well

LP Well

15 km Pipeline

Drying

unit

Compressor

Case 1 At eductor:


Flow ratio HP/LP = 2.3

Case 2 At eductor:


Flow ratio HP/LP = 7

Caltec

Jet Pump

Bergen Drying Facility surface jet pump

Slide 27

28

Production optimisation by surface jet pump

Flow well T Analog value Analog value Analog value Analog value Analog value Return set point

K5ENC_QV101T.PV

kNm3/d

K5ENC_TT_101_T

°C

K5ENC_PT_101_T

Bar

K5ENC_PT_103_T

BAR

K5ENC_PT_105_T

BAR

K5ENC_PT_107_T

BAR

K5ENC_ROCV_101_T_SP

%

K5ENC T = well 1 26/05/2008 09:49:03.893

days-336 -308 -280 -252 -224 -196 -168 -140 -112 -84 -56 -28

50

100

150

200

0

250

0

100

0

50

0

50

0

50

0

50

0

100

0.00

11.87

4.54

10.11

24.18

58.78

197.11

142.39

50.86

25.81

8.26

1.44

2.75

94.99

14/01/2008 16:47:42.74546

Re-start of the well after a

closed-in period of two

years , with reduced FTHP

from 40 to 26 bar using

SJP

After ten moths

maximum stable flow

reached using SJP

Alaska, USA

Benefits;

• Used available wasted energy

to off-load the well.

• Total production from well raised to 7

MMscfd from 2.5 MMscfd. Production

increased by 180%.

• Liquid loading cycle was reduced, hence

more sustainable production gain.

Solution ; Used HP gas from long-string to off-

load the well via surface jet pump

Dual Completion

Well

Gas Jet Pump

LP Wet gas

HP Gas

ANGSI FIELD MALAYSIA

REVIVAL OF 16 GAS WELLS

OIL PRODUCTION - WELLCOM BOOST SYSTEM

LOW PRESSURE

OIL WELLS

JET PUMP

TO PIPELINE

GAS

LIQUID

I-SEP

BOOSTER PUMP

COMMINGLER

LIQUID

HIGH PRESSURE GAS GAS

LIQUID

Commingler

Php/Plp=7.9

Qhp/Qlp=3.23

Pd/Plp=1.46

Slide 33

WELLCOM SYSTEM ; OFFSHORE MALYSIA Lift gas as the motive flow+ A booster pump to boost the liquid phase

Jet pump

I-SEP

HI-SEP

Booster

Pump

Slide 34

I-SEP

Slide 35

COMPACT SEPARATOR TO

SEPARATE GAS FROM LIQUIDS

SIZE MATTERS !

HI-SEP

I-SEP

Slide 36

I-SEP

On-Shore, Italy

Benefits

• Backpressure reduction on the wells of up to

11 bar was achieved.

• Simple to operate with no rotating parts

• Net extra oil gain of 350 bbl/d with additional

1.5 MMscfd of gas was achieved.

Multi Awards winning solution

HP oil well as the source of motive flow

Slide 37

I-SEP

WELLCOM APPLICATION: Cendor, Malaysia

I-SEP

TO PROCESS

SYSTEM JET PUMP

COMMINGLER

FROM HP WELL

FROM LP WELL

GAS

LIQUID

WELLCOM BOOSTING SYSTEM

Wellcom oil system ; multiphase HP

wells were used to bring in closed

low pressure oil wells.

Benefits

• Used available energy from HP well

• 20% pressure boost for LP wells.

• Increased production by over 35%

( 150 b/d )

• Improved flow regime in well bore,

stabilising production.

FTHP 360 psia

FTHP 69.6 PSIA

87 psia

450 b/d+0.138 MMSCFD

3612 b/d

Dp FWHP; 17.4 psi

I-SEP

Slide 38

Record of flowing bottomhole pressure before and

after installing the jet pump system

700

750

800

850

900

950

1000

1050

1100

1150

1200

06:0

0:0

0

06:5

7:0

0

07:5

4:0

0

08:5

1:0

0

09:4

8:0

0

10:4

5:0

0

11:4

2:0

0

12:3

9:0

0

13:3

6:0

0

14:3

3:0

0

15:3

0:0

0

16:2

7:0

0

17:2

4:0

1

18:2

1:0

2

19:1

8:0

2

20:1

5:0

2

21:1

2:0

2

22:0

9:0

2

23:0

6:0

2

00:2

1:0

0

01:1

8:0

1

02:1

5:0

1

03:1

2:0

1

04:0

9:0

1

05:0

6:0

1

06:0

3:0

1

07:0

1:5

4

07:5

9:3

2

Flowing bottomhole pressure (FBHP)

FBHP Dp =140 psi

Dp at wellhead=17.4 psi

Slide 39

USES OF THE TEST SEPARATOR

•Well testing

•Well testing/metering at reduced FTHP

•Well revival

18 October, 2013 Presentation title 41

LP Wells

Test Header

Production Header

Test Separator

M

M

Well Revival

Gas Jet Pump

Well Revival

Liquid Jet PUMP

HP Gas

HP Liquid Gas

Liquid

COMMERCIAL - IN - CONFIDENCE

©Caltec Limited 2010. This information contains Caltec’s proprietary intellectual property and is not to be disclosed to a third party without the pri or written consent of Caltec Limited. Caltec Limited, Medway Court, Cranfield, Bedfordshire MK43 0FQ United Kingdom : Tel: +44 (0)1234 750144 Email: info@caltec. com www.caltec.com

Closed drain

(option 1)

To vent or flare (option3)

WELL REVIVAL USING THE TEST SEPARATOR

APPLIES TO BOTH GAS AND OIL WELLS

(Option 2)

Test Separator

M

M

M

PT

HP

Well

LP

Wells

Test Header

Production

Header

Test Cooler

Production

Cooler 14” Sub Sea

Line to CPP

Commingler

)

Alternative

use of

booster pump

To Pressure

Relief Line

PT

PT

TT

Well Revival Jet Pump

PT

PT

TT

Gas Jet Pump

PT PT

LP Silencer

Discharge

Silencer

LP Silencer

Discharge

Silencer

Jet Pump Skid

Silen

cers

Skid

Jet Pump Skid

Silen

cers

Skid

Slide 42

EFFECT OF SJP COMBINED WITH GAS LIFT

INCREASED PRODUCTION

Slide 43

Gaslift injection

system

Pay zone

Production

via Tubing

Wellcom system &

Gaslift injection

Pay zone

Well production

Lift gas

Surface

Wellbore

Well

Wellhead

Pro

du

ced

Oil F

low

rate

Gaslift Injection Flowrate

Gaslift injection

Additional

production

SJP

To downstream process

HP

EFFECT OF COMBINED GAS LIFT AND SJP

Depth Lift Gas

(ft) 0 MMscfd 0 MMscfd 2 MMscfd 2 MMscfd 4 MMscfd 4 MMscfd0 Dispersed Bubble Dispersed Bubble Dispersed Bubble Dispersed Bubble Dispersed Bubble Dispersed Bubble

700 Dispersed Bubble Dispersed Bubble Dispersed Bubble Dispersed Bubble Dispersed Bubble Dispersed Bubble

1425 Dispersed Bubble Dispersed Bubble Dispersed Bubble Dispersed Bubble Dispersed Bubble Dispersed Bubble

2125 Slug Dispersed Bubble Dispersed Bubble Dispersed Bubble Dispersed Bubble Dispersed Bubble

2850 Slug Slug Dispersed Bubble Dispersed Bubble Dispersed Bubble Dispersed Bubble

3550 Slug Slug Dispersed Bubble Dispersed Bubble Dispersed Bubble Dispersed Bubble

4275 Slug Slug Slug Dispersed Bubble Dispersed Bubble Dispersed Bubble

4975 Slug Slug Slug Slug Dispersed Bubble Dispersed Bubble

5700 Bubble Flow Slug Slug Slug Dispersed Bubble Dispersed Bubble

6400 S.P. Turbulent S.P. Turbulent Slug Slug Slug Dispersed Bubble

7125 S.P. Turbulent S.P. Turbulent Slug Slug Slug Slug



9246 S.P. Turbulent S.P. Turbulent Bubble Flow Bubble Flow Slug Slug

9971 S.P. Turbulent S.P. Turbulent S.P.Turbulent S.P.Turbulent Slug Slug

10696 S.P. Turbulent S.P. Turbulent S.P.Turbulent S.P.Turbulent Slug Slug

FWHP (psig) 300 150 300 150 300 150BHP (psig) 3940 3825 3785 3738 3744 3714

Oil flow rate (bbl/d) 2869 3440 3642 3875 3845 3998

dQ (bbl/d) - 571 773 1006 ** 976 ** 1129Water flow rate (bbl/d) 3804 4560 4827 5137 5097 5300

Gas flow rate (MMscfd) 2.3 2.752 2.91 3.1 3.076 3.1984

Slide 44

0

773

976

1041 1026

571

1006

1129 1151 1114

0

200

400

600

800

1000

1200

1400

0 1 2 3 4 5 6 7 8 9

dQ

(b

op

d)

Lift Gas (MMscfd)

Comparison of Gas Lift and use of SJPs and Effect on Production Increase

Gas Lift Only

Gas Lift + SJP

Pay zone

Gas lift injection

system Well production

Surface

Wellbore

Pay zone

Wellhead

Gas lift injection valves

Liquid level

To production process

SJP

Recycle

Gas lift Compressor Injection Gas

USE OF SJP TO RAISE THE PRESSURE OF LIFT GAS FOR

INCREASING GAS INJECTION DEPTH

SOME ISSUES RELATED TO DOWNHOLE JET PUMPS

Slide 47

Effectiveness of downhole jet pumps for well revival

• Traditionally liquid has been the motive flow.

Effective mainly for maintaining production from

shallow oil wells with low GOR

• Effective in lifting heavy oil using a diluent fluid to

reduce viscosity(Vega field- Agip)

• Limited experience in using gas as the motive flow.

HP gas is not effective in boosting the bottomhole

pressure

• Gas can be injected at bottomhole as lift gas via a

number of specially designed nozzles to generate a

good mixture.

Slide 48

DOWNHOLE JET PUMP-GAS AS MOTIVE FLOW

Slide 49

FACTORS TO CONSIDER

FOR USE OF DOWNHOLE JET PUMPS

• PRODUCTION (OIL OR GAS)

• GOR AND GVF

• WELL DEPTH AND PROFILE

• WELL FLUIDS STAUS AT BOTTOMHOLE(GVF)

• FOR OIL WELLS USE OF JET PUMP AND HP GAS

AS THE MOTIVE FLOW WILL BE BENEFICIAL-IN

THIS CASE ALSO CONSIDER USE OF MULTI-

NOZZLE GAS INJECTION

Slide 50

DESIGN &OPERATION ISSUES

•NOISE

•JT EFFECT

• INSTRUMENTATION

•CONTROL

•CHANGE OF INTERNALS

•PERFORMANCE

MONITORING/ACCEPTANCE

•MATERIALS/CODES

Slide 51

In-line Acoustic silencers for LP

and Discharge Side Streams

18 October, 2013 Presentation title 52

P TP T

P

T

JET PUMP

HP

Recommended Instrumentation for Jet Pump System

COMMERCIAL-IN-CONFIDENCE

©Caltec Limited 2011. This information contains Caltec’s proprietary intellectual property and is not to be disclosed to a third party without the prior written consent of Caltec Limited.

Caltec Limited, Medway Court, Cranfield, Bedfordshire MK43 0FQ United Kingdom : Tel: +44 (0)1234 750144 Email: [email protected] www.caltec.com

RECOMMENDED INSTRUMENTATION

FOR SURFACE JET PUMP SYSTEM

MEASURING THE LP GAS FLOW RATE IS RECOMMENDED

PERFORMANCE OF THE SJP AND EFFECT OF HP

AND LP PRESSURE AND FLOW RATE

•Nozzle performance

•SJP response to LP flow rate

•Well performance VS SJP performance

Slide 55

18 October, 2013

18 October, 2013

20

25

30

35

40

45

50

55

0 5 10 15 20 25 30 35

Inle

t L

P p

ressu

re (

barg

)

Inlet LP flowrate (MMscfd)

HP=60 MMscfd @ 100 barg Double LP liquid flow No LP liquid flow

SJP Discharge Pressure = 50 barg

SJP design point:

HP = 60 MMscfd @ 100 barg

LP = 24.65 MMscfd @ 41.8 barg

+ 2216 bbl/d liquid

Discharge = 50 barg

Base Case Surface Jet Pump (SJP) Performance LP pressures vs. LP intake flow rates and the effect of liquid on SJP performance

Maximum flow through

SJP before choking

Operating curve 1

Caltec ref: 2215

15/05/12

Rev C

COMMERCIAL-IN-CONFIDENCE

©Caltec Limited 2012. This information contains Caltec’s proprietary intellectual property and is not to be disclosed to a third party without the prior written consent of Caltec Limited. Caltec Limited, Medway Court, Cranfield, Bedfordshire MK43 0FQ United Kingdom : Tel: +44 (0)1234 750144 Email: [email protected] www.caltec.com

Double LP liquid flow rate:


+ 4432 bbl/d liquid

No LP liquid flow rate:


+ 0 bbl/d liquid

IPR

DD1

D

raw

do

wn

DD2

Pressure

(Psi)

IPR

Well performance curve In different years

Original tangent line for PI at DD1

New tangent line for PI

Production rate

Jet pump performance

Pro

du

cti

on

pre

ssu

re

CHANGES TO PI AT DIFFERENT FWHPs

Production increase

Operating point

KEY; DD1 & DD2; DRAWDOWN 1&2

HOW THE PERFORMANCE OF THE WELL AND THE SJP MATCH

MATERIALS/CODES/ORIENTATION/LOCATION

• MATERIALS BASED ON FLUIDS COMPOSITION AND

COMPATIBILITY WITH PIPE WORK (CS,STAINLESS

STEEL,DUPLEX..)

• CODES; PIPELINE CODE(B31.3),PED,LOCAL/CLIENT

REGULATIONS.

• ORIENTATION; HORIZONTAL,VERTICAL,INCLINED

• LOCATION; DICTATED BY SITE CONDITIONS

Slide 59

Skid availability 4 to 6 weeks from order

Motive fluid HP Gas

HP Inlet pressure 50 - 140 bar (*)

LP Pressure boost 5 - 20 bar (*)

Pressure rating ANSI 1500#

Material LTCS NACE

CTP sizes (Jp-6) HP 3”, LP 4”, Discharge 6”

CTP sizes (Jp-10) HP 6”, LP 8”, Discharge

10”

CTP sizes (Jp-16) HP 8”, LP 12”, Discharge

16”

Gas Jet Pump System

Jet Pump

Skid ~ 1.5 m

~ 4 m ~ 2.4 m

LP Gas

Jet Pump

Discharge Silencer

LP Silencer

HP Gas

Vent

Drain

Drain

Drip Pan

CTP

Tie-in

Point (CTP)

Silencers

Skid

~ 1.5 m

~ 3.5 m

~ 2.4 m

Vent

ECONOMICS; USE OF SURFACE JET PUMPS

• Low capital cost

• Capital recovery within a few weeks to a few months

• Short delivery period ; 8 to 14 weeks

• Practically no operation cost /passive operation

• Practically no maintenance cost

• Alternative solutions more complex and costlier

• Rental option available to minimise capital cost

• Short life period is economically acceptable

• Could enhance what is achieved by other

deliquification systems

Slide 61

CLOSING REMARKS

• Simplicity & cost effectiveness makes jet pump solutions

very attractive & economical

• A good tool for initial well deliquification before the situation

worsens

• In addition to economic benefits, eliminating intermediate

compressors, deferring compressor upgrading or reducing

liquid hold up in pipelines are additional benefits

• The system can work well with other deliquification

solutions

• Installing tie-in points during shut downs simplifies

installation

• Rental option justifies very short operation life

Slide 62

THANK YOU

QUESTIONS WELLCOME

Slide 63

deliquification & revival of oil and gas wells … · using surface jet pumps recent...

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