Best practices in Gas Well Best practices in Gas Well ...

Best practices in Gas Well Best practices in Gas Well Best practices in Gas Well Best practices in Gas Well DeliquificationDeliquificationDeliquificationDeliquification, OMV, OMV, OMV, OMV----PetromPetromPetromPetrom RomaniaRomaniaRomaniaRomania

September 2014September 2014September 2014September 2014

Vasile Stanculescu, Vasile Stanculescu, Vasile Stanculescu, Vasile Stanculescu,

Philipp Tippel, Laurentiu Philipp Tippel, Laurentiu Philipp Tippel, Laurentiu Philipp Tippel, Laurentiu Niculeanu Niculeanu Niculeanu Niculeanu ---- OMV OMV OMV OMV PetromPetromPetromPetrom

2 GWD Practice in OMV-Petrom|

AgendaAgendaAgendaAgenda

�Background

�Overview of Gas well Deliquification activity

�GWD - Technical applications

�Collaborations and Service Companies

�Case studies of Gas well Deliquification

�Results of Gas well Deliquification activity

�Summary and Conclusions


Background Background Background Background ---- Gas Well Deliquification ActivityGas Well Deliquification ActivityGas Well Deliquification ActivityGas Well Deliquification Activity

� OMV-Petrom is the largest Producer of Oil and Gas in South Eastern Europe having approximately 700 Gas Wells

� In 2007 OMV-Petrom started with first Gas Well Deliquification tests

� Over the last 8 years, the Gas Well Deliquification (GWD) activity has recognized as a KEY process in OMV Petrom

including many Deliquification methods


► Between 2008 to 2014, over 327 gas wells were installed

► The main Deliquification methods applied is:

► Foam injection, Capillary Foam injection

► Plunger Lift

► Wellhead Compression

► Additional increase production to date is around of 460000 Scm/day

(an average of 3000 Sm3/day/well equipped)

Overview Overview Overview Overview of of of of GWD GWD GWD GWD Activity Activity Activity Activity 2008200820082008----2014201420142014

0000

100100100100

200200200200

300300300300

400400400400

500500500500

600600600600

700700700700

800800800800

0000

1,0001,0001,0001,000

2,0002,0002,0002,000

3,0003,0003,0003,000

4,0004,0004,0004,000

5,0005,0005,0005,000

6,0006,0006,0006,000

01/12/0701/12/0701/12/0701/12/07 01/11/0801/11/0801/11/0801/11/08 01/10/0901/10/0901/10/0901/10/09 01/09/1001/09/1001/09/1001/09/10 01/08/1101/08/1101/08/1101/08/11 01/07/1201/07/1201/07/1201/07/12 01/06/1301/06/1301/06/1301/06/13 01/05/1401/05/1401/05/1401/05/14

No.

of w

ells e

quip

ped

No.

of w

ells e

quip

ped

No.

of w

ells e

quip

ped

No.

of w

ells e

quip

ped

Gas

rat

e, [th

. Scm

/day

]G

as rat

e, [th

. Scm

/day

]G

as rat

e, [th

. Scm

/day

]G

as rat

e, [th

. Scm

/day

]

Production increase achieved vs. wells equipped 2008 Production increase achieved vs. wells equipped 2008 Production increase achieved vs. wells equipped 2008 Production increase achieved vs. wells equipped 2008 ---- 2014201420142014

Gas rate before equipped, [th.Scm/day]Gas rate before equipped, [th.Scm/day]Gas rate before equipped, [th.Scm/day]Gas rate before equipped, [th.Scm/day] Gas rate after equipped, [th.Scm/day]Gas rate after equipped, [th.Scm/day]Gas rate after equipped, [th.Scm/day]Gas rate after equipped, [th.Scm/day] No.of wells equippedNo.of wells equippedNo.of wells equippedNo.of wells equipped

Wells Wells Wells Wells

equipped in equipped in equipped in equipped in 2008200820082008Wells Wells Wells Wells

equipped in equipped in equipped in equipped in 2009 2009 2009 2009 ----

2010201020102010

2012201220122012


equipped in equipped in equipped in equipped in 2011 2011 2011 2011 ----

2012201220122012


equipped in equipped in equipped in equipped in 2013 2013 2013 2013 ---- 2014201420142014


GWD GWD GWD GWD ---- Technical applicationsTechnical applicationsTechnical applicationsTechnical applications

► Establishment the optimum lift method and uplift potential

► Challenge: Condensate Production, Choke Size/Tubing/Gas line limitations (pressure, size)

► Most Common methods used :► Foam (FI) and Capillary Foam injection(CFI)► Plunger Lift (PL) ► Velocity Strings (VS)► Compression:

- GasJack compressor (GJ)- Wellhead electrical compressor (WHC)

► Less common methods applied with good results:

► Gaslift assisted by Plunger Lift

► Gaslift optimized with Foam injection

► Hydraulic Piston pump

- In testing


Collaborations and Service CompaniesCollaborations and Service CompaniesCollaborations and Service CompaniesCollaborations and Service Companies

GWDGWDGWDGWD

ActivityActivityActivityActivity

►Weatherford Comp.:

► Foamer and Capillary inj.

► PL. and GL

►Velocity string

►Hydraulic piston pump

►No. of wells equipped: 246

► Increase gas prod.:

► 300000 Scm/day



► PL. and GL

►Velocity string




► 300000 Scm/day



► PL. and GL

►Velocity string




► 300000 Scm/day

►IRCAT/Compressco Comp.:

►GasJack compressor

►No. of applications: 50


► 70000 Scm/day

►IRCAT/Compressco Comp.:

►GasJack compressor



► 70000 Scm/day

►IRCAT/SAFE Comp.:

►WH electrical compressor



► 56000 Scm/day

►IRCAT/SAFE Comp.:

►WH electrical compressor



► 56000 Scm/day

►Champion Comp.:

► Foam injection



► 10000 Scm/day

►Champion Comp.:

► Foam injection



► 10000 Scm/day

►Fangmann Comp.:

► Foam injection



► 3000 Scm/day

►Fangmann Comp.:

► Foam injection



► 3000 Scm/day

►Baker/BJ Services Comp.:

► Foam injection



► 20000 Scm/day

►Baker/BJ Services Comp.:

► Foam injection



► 20000 Scm/day


Case 1. Case 1. Case 1. Case 1.

Gas well optimized by Sticks and Gas well optimized by Sticks and Gas well optimized by Sticks and Gas well optimized by Sticks and FoamerFoamerFoamerFoamer

W1 W1 W1 W1 Field Field Field Field 1111 ---- ResultsResultsResultsResults

► Well description:

► Well had an fluctuating production with gas rate

between 9000 Scm/day and 13000 Scm/day

► 4-5 months soap sticks have been used as treatment

but even with this method well continued to have:

- High differential casing-tubing pressure

- Fluctuating of gas rates between 12000 Scm/day

and 17000 Scm/day

► Objective:

►Maintaining gas rate to a constant value of 17000 Scm/day

►Unloading the well

► Results:

► Well was equipped with continuous foam injection in the annulus

► After installation the gas production was increased to 18000 Scm/day,

with low fluctuating


Results of Case 1Results of Case 1Results of Case 1Results of Case 1

► Gas well optimized by Sticks and Foamer injection in annulus

0000

10101010

20202020

30303030

40404040

50505050

0000

5555

10101010

15151515

20202020

25252525

30303030

35353535

40404040

45454545

01/09/1301/09/1301/09/1301/09/13 21/10/1321/10/1321/10/1321/10/13 10/12/1310/12/1310/12/1310/12/13 29/01/1429/01/1429/01/1429/01/14 20/03/1420/03/1420/03/1420/03/14 09/05/1409/05/1409/05/1409/05/14 28/06/1428/06/1428/06/1428/06/14

Pre

ssur

e, [ba

r]Pre

ssur

e, [ba

r]Pre

ssur

e, [ba

r]Pre

ssur

e, [ba

r]

Gas

G

as

Gas

G

as R

ate

Rat

eRat

eRat

e , [, [ , [, [ thth thth.. ..Sc

mSc

mSc

mSc

m/d

ay/d

ay/d

ay/d

ay]] ]]

Gas Rate, [th.Scm/day]Gas Rate, [th.Scm/day]Gas Rate, [th.Scm/day]Gas Rate, [th.Scm/day] Cassing Pressure [bar]Cassing Pressure [bar]Cassing Pressure [bar]Cassing Pressure [bar] Tubing Pressure, [bar]Tubing Pressure, [bar]Tubing Pressure, [bar]Tubing Pressure, [bar]

BeforeBeforeBeforeBefore applicationapplicationapplicationapplication

SticksSticksSticksSticks applicationapplicationapplicationapplication

FoamerFoamerFoamerFoamer applicationapplicationapplicationapplication


Case 2. Case 2. Case 2. Case 2.

Gas well assisted by Gas well assisted by Gas well assisted by Gas well assisted by FoamerFoamerFoamerFoamer and Capillaryand Capillaryand Capillaryand Capillary

W2 Field 2 W2 Field 2 W2 Field 2 W2 Field 2 ---- ResultsResultsResultsResults


►Gas well was in production, equipped with foamer injection

►After foamer treatment, the tubing pressure increased from 26 bar to 35 bar and gas rate from 6000 Scm/day to 8000 Scm/day

►Volume of foamer injected was 8 liters/day for 2 cm/day of liquid

► Objective:

►Reducing costs of foamer injection

►Eliminating gas production fluctuation

► Increasing the gas rate

► Results:

►Well was equipped with continuous foamer

injection through the capillary, foamer rate for

injection was 6 liters/day for 1,5 cm/day of liquid

►Tubing pressure increased from 35 bar to 37 bar and gas rate from 8000 Scm/day to 12000 Scm/day, well producing constant


Results of Case 2 Results of Case 2 Results of Case 2 Results of Case 2

► Gas well assisted by Foamer injection and Capillary

0000

5555

10101010

15151515

20202020

25252525

30303030

35353535

40404040

45454545

50505050

0000

2222

4444

6666

8888

10101010

12121212

14141414

16161616

18181818

20202020

01/05/1301/05/1301/05/1301/05/13 30/06/1330/06/1330/06/1330/06/13 29/08/1329/08/1329/08/1329/08/13 28/10/1328/10/1328/10/1328/10/13 27/12/1327/12/1327/12/1327/12/13 25/02/1425/02/1425/02/1425/02/14 26/04/1426/04/1426/04/1426/04/14 25/06/1425/06/1425/06/1425/06/14

Pre

ssur

e, [ba

r]Pre

ssur

e, [ba

r]Pre

ssur

e, [ba

r]Pre

ssur

e, [ba

r]

Gas

Rat

e, [th

.Scm

/day

]G

as R

ate, [th

.Scm

/day

]G

as R

ate, [th

.Scm

/day

]G

as R

ate, [th

.Scm

/day

]

Gas Rate, [th.Scm/day]Gas Rate, [th.Scm/day]Gas Rate, [th.Scm/day]Gas Rate, [th.Scm/day] Cassing Pressure, [bar]Cassing Pressure, [bar]Cassing Pressure, [bar]Cassing Pressure, [bar] Tubing Pressure, [bar]Tubing Pressure, [bar]Tubing Pressure, [bar]Tubing Pressure, [bar]

BeforeBeforeBeforeBefore applicationapplicationapplicationapplication

CapillaryCapillaryCapillaryCapillary applicationapplicationapplicationapplication

FoamerFoamerFoamerFoamer applicationapplicationapplicationapplication


Case 3.Case 3.Case 3.Case 3.

GasliftGasliftGasliftGaslift Well Converted to flowing Gas WellWell Converted to flowing Gas WellWell Converted to flowing Gas WellWell Converted to flowing Gas Well

W3 Field W3 Field W3 Field W3 Field 2222 ---- Results Results Results Results


►Gaslift well used 12000 Scm/day of injection gas

Gas production from reservoir was 3000 Scm/day

with 2.5 cm/day of liquid

► Objective:

►Reducing costs with gas injected

►Obtaining a constant gas rate

► Results:

►Well was equipped with continuous foamer injection

►The gas injection rate decreased from 12000-15000 Scm/day to

6000 Scm/day

►The reservoir gas rate increased from an average of 3000 Scm/day to 4000 Scm/day

►Gas injection stopped and the well produced only with foamer injection. The foamer rate used for lift was 6 liters/day for 2.5 cm/day of liquid


Results of Case 3Results of Case 3Results of Case 3Results of Case 3

► Gaslift Well Converted to Gas Well

0000

1111

2222

3333

4444

5555

6666

7777

8888

9999

10101010

0000

2222

4444

6666

8888

10101010

12121212

14141414

16161616

18181818

20202020

11-Mar-0811-Mar-0811-Mar-0811-Mar-08 30-Apr-0830-Apr-0830-Apr-0830-Apr-08 19-Jun-0819-Jun-0819-Jun-0819-Jun-08 8-Aug-088-Aug-088-Aug-088-Aug-08 27-Sep-0827-Sep-0827-Sep-0827-Sep-08 16-Nov-0816-Nov-0816-Nov-0816-Nov-08 5-Jan-095-Jan-095-Jan-095-Jan-09 24-Feb-0924-Feb-0924-Feb-0924-Feb-09 15-Apr-0915-Apr-0915-Apr-0915-Apr-09 4-Jun-094-Jun-094-Jun-094-Jun-09

Liq

uid

Rat

e, [cm

/day

]Liq

uid

Rat

e, [cm

/day

]Liq

uid

Rat

e, [cm

/day

]Liq

uid

Rat

e, [cm

/day

]

Gas

Rat

e, [th

.Scm

/day

]G

as R

ate, [th

.Scm

/day

]G

as R

ate, [th

.Scm

/day

]G

as R

ate, [th

.Scm

/day

]

Reservoir Gas Rate, [th.Scm/day]Reservoir Gas Rate, [th.Scm/day]Reservoir Gas Rate, [th.Scm/day]Reservoir Gas Rate, [th.Scm/day] Injection Gas Rate, [th.Scm/day]Injection Gas Rate, [th.Scm/day]Injection Gas Rate, [th.Scm/day]Injection Gas Rate, [th.Scm/day] Liquid Rate, [cm/day]Liquid Rate, [cm/day]Liquid Rate, [cm/day]Liquid Rate, [cm/day]

Installation of continuous Installation of continuous Installation of continuous Installation of continuous foamerfoamerfoamerfoamer injectioninjectioninjectioninjection

Injection rate was dropped Injection rate was dropped Injection rate was dropped Injection rate was dropped

to 6000 to 6000 to 6000 to 6000 ScmScmScmScm/day/day/day/day

Injection rate was Injection rate was Injection rate was Injection rate was

stoppedstoppedstoppedstopped

11.03.13 30.04.13 19.06.13 8.08.13 27.09.13 16.11.13 05.01.14 24.02.14 15.04.14 4.06.1411.03.13 30.04.13 19.06.13 8.08.13 27.09.13 16.11.13 05.01.14 24.02.14 15.04.14 4.06.1411.03.13 30.04.13 19.06.13 8.08.13 27.09.13 16.11.13 05.01.14 24.02.14 15.04.14 4.06.1411.03.13 30.04.13 19.06.13 8.08.13 27.09.13 16.11.13 05.01.14 24.02.14 15.04.14 4.06.14



GasliftGasliftGasliftGaslift assisted by Plunger Liftassisted by Plunger Liftassisted by Plunger Liftassisted by Plunger Lift

W4 Field 3 W4 Field 3 W4 Field 3 W4 Field 3 ---- Results Results Results Results


►Gaslift well used 5000 Scm/day to lift of 0.9 cm/day liquid

Gas production from formation was 1000 Scm/day with

0.3 cm/day of oil

► Objective:

► Increase of oil production

►Dewaxing of tubing

► Results:

►Well was equipped with Plunger Lift equipment

► 8 intermittent cycles per day were established, with

the same gas rate for lifting, 5000 Scm/day

► It solved the problem of tubing Dewaxing

►The reservoir gas rate increased from 1000 Scm/day to

5000 Scm/day and oil rate increased from 0.3 to/day to

1 to/day


Results of Case Results of Case Results of Case Results of Case 4444

► Gaslift assisted by Plunger Lift

0000

100100100100

200200200200

300300300300

400400400400

500500500500

600600600600

700700700700

0000

5555

10101010

15151515

20202020

25252525

30303030

35353535

40404040

45454545

18:06:31 18:06:31 18:06:31 18:06:31 22:05:18 22:05:18 22:05:18 22:05:18 02:05:1902:05:1902:05:1902:05:19 06:05:1906:05:1906:05:1906:05:19 10:05:2010:05:2010:05:2010:05:20

Inject

ed G

as, [S

cm]

Inject

ed G

as, [S

cm]

Inject

ed G

as, [S

cm]

Inject

ed G

as, [S

cm]

Pre

ssur

e, [ba

r]Pre

ssur

e, [ba

r]Pre

ssur

e, [ba

r]Pre

ssur

e, [ba

r]

Tubing Pressure, [bar]Tubing Pressure, [bar]Tubing Pressure, [bar]Tubing Pressure, [bar] Casing Pressure, [bar]Casing Pressure, [bar]Casing Pressure, [bar]Casing Pressure, [bar] Line Pressure, [bar] Line Pressure, [bar] Line Pressure, [bar] Line Pressure, [bar] Injected Gas, [Scm]Injected Gas, [Scm]Injected Gas, [Scm]Injected Gas, [Scm]

18:06:318:06:318:06:318:06:31 22:05:18 02:05:19 06:05:19 10:05:20 14:05:19 18:06:20 1 22:05:18 02:05:19 06:05:19 10:05:20 14:05:19 18:06:20 1 22:05:18 02:05:19 06:05:19 10:05:20 14:05:19 18:06:20 1 22:05:18 02:05:19 06:05:19 10:05:20 14:05:19 18:06:20



Gas well assisted by Wellhead compressorGas well assisted by Wellhead compressorGas well assisted by Wellhead compressorGas well assisted by Wellhead compressor

Backside injection systemBackside injection systemBackside injection systemBackside injection system

W5 Field 4 W5 Field 4 W5 Field 4 W5 Field 4 ---- ResultsResultsResultsResults


►Gas well was equipped for foamer injection,

foamer rate being 6 liters/day for 1,5 cm/day of liquid

►Well had an fluctuating production, with low

gas rate between 3000 Scm/day and 6000 Scm/day

► Objectives:

►Loading liquid and increasing the gas rate

► Results:

►Wellhead compressor (GJ) for Backside injection was installed

►The foamer injection was stopped during Backside injection

►The gas aspirated was injected in annulus for unloading liquid Tubing pressure increased from 1 bar to 6-8 bar and gas rate from 4000 Scm/day to 17000 Scm/day

►After unloaded liquid, well was reequipped for foamer injection


Results of Case Results of Case Results of Case Results of Case 5555

► Gas well assisted by Wellhead compressor - Backside injection

0000

2222

4444

6666

8888

10101010

12121212

14141414

16161616

18181818

0000

2222

4444

6666

8888

10101010

12121212

14141414

16161616

18181818

20202020

4/1/20134/1/20134/1/20134/1/2013 5/16/20135/16/20135/16/20135/16/2013 6/30/20136/30/20136/30/20136/30/2013 8/14/20138/14/20138/14/20138/14/2013 9/28/20139/28/20139/28/20139/28/2013 11/12/201311/12/201311/12/201311/12/2013

Pre

ssur

e, [ba

r]Pre

ssur

e, [ba

r]Pre

ssur

e, [ba

r]Pre

ssur

e, [ba

r]

Gas

Rat

e, [th

.Scm

/day

]G

as R

ate, [th

.Scm

/day

]G

as R

ate, [th

.Scm

/day

]G

as R

ate, [th

.Scm

/day

]

Gas Rate, [th.Scm/day]Gas Rate, [th.Scm/day]Gas Rate, [th.Scm/day]Gas Rate, [th.Scm/day] Tubing Pressure, [bar]Tubing Pressure, [bar]Tubing Pressure, [bar]Tubing Pressure, [bar] Casing Presure, [bar]Casing Presure, [bar]Casing Presure, [bar]Casing Presure, [bar]

GWDGWDGWDGWD

Period of Backside injectionPeriod of Backside injectionPeriod of Backside injectionPeriod of Backside injection

GWDGWDGWDGWD


Results of Gas well Deliquification activityResults of Gas well Deliquification activityResults of Gas well Deliquification activityResults of Gas well Deliquification activity

�Number of applications: 327 wells

�Additional increase production:

�460000 Scm/day, 2990 boe/day

�Plan for 2014:

�Optimization: 35 wells

�Test: “Hydraulic piston pump”

Gas well Gas well Gas well Gas well DeliquificationDeliquificationDeliquificationDeliquification methodsmethodsmethodsmethodsAssets / No. of wells equipped vs. active

TotalTotalTotalTotal1 2 3 4 5 6 7 8 9

Simple foamer injection (liquid+solid) 7/1 104/46 11/7 5/1 5/5 1/1 2/1 0 54/26 195/88

Foamer inj. with capillary outside the tubing 0 1/0 0 0 0 0 0 0 0 1/0

Foamer inj. with capillary through the tubing 3/0 30/16 0 0 3/2 0 4/2 0 31/21 71/41

Plunger Lift 0 7/6 0 0 0 0 0 0 3/2 10/8

WH compressors (GasJack) 0 10/3 18/5 0 2/2 4/4 4/2 0 12/11 50/27

TotalTotalTotalTotal 10/1 152/71 35/12 5/1 10/9 5/5 10/5 0 100/60 327/164

Total 2007 Total 2007 Total 2007 Total 2007 ---- To dateTo dateTo dateTo date 327/164327/164327/164327/164

Total expected end of 2014Total expected end of 2014Total expected end of 2014Total expected end of 2014 342/175342/175342/175342/175


�Workshop for exchange

of experience

�Alignment of all

involved disciplines

�Buy-in and ownership

of operations

�“Lessons Learned”

“State of the Art” vs. “Fit for Purpose” Technology“State of the Art” vs. “Fit for Purpose” Technology“State of the Art” vs. “Fit for Purpose” Technology“State of the Art” vs. “Fit for Purpose” Technology

Share best Practices Share best Practices Share best Practices Share best Practices

�Role of technology

drivers

�Contracts, Benefits

� Tailor - made training

Service companies Service companies Service companies Service companies Pilot tests Pilot tests Pilot tests Pilot tests

�New applications to

prove applicability

Fit for Purpose ApplicationsFit for Purpose ApplicationsFit for Purpose ApplicationsFit for Purpose Applications

� Alpha VSR Flowmeter

� Ren Gate™ Master Valve


Summary and Conclusions of GWD activitySummary and Conclusions of GWD activitySummary and Conclusions of GWD activitySummary and Conclusions of GWD activity

► Summary

► Soap sticks - Cheaper method but used very rarely

► Foamer injection (Capillary string) - More wells equipped, in extending

►Plunger lift - Good results, in extending, step by step implementation

►Hydraulic piston pump - In testing

►Compression - Many application, in extending

► Conclusions

►The success of activity is based on good collaboration between Petrom and Service Companies

►Based on the good results obtained, we will extend number applications and continue testing new methods:

- Different types of condensate foamers

- Alpha VSR Flowmeter

Thank you!Thank you!Thank you!Thank you!

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