Pilot Re-Lining of the injector well Žu-111

for EOR Project of CO2/water injection

Authors: Josip Hudek, Tomislav Janton, Darko Brkljačić, Željko Habijanec, Željko Bolarić

Challenges and Future Technologies in EOR Implementation

Szolnok, April 23-24, 2013

EOR CO2 Ivanić & Žutica

GTP Molve

Ivanić & Žutica

EOR CO2 Ivanić & Žutica – REQUIREMENTS

CO2 & H2O (+H2S) in WAG mode = Corrosive environment

EOR injector CSG to be P/T to 200 bar

Experienced CSG failures in the past

Conclusion:

Existing CSG will not "survive" EOR requirements

SOLUTION = RE-LINING

Optimize well design in the term of well life cost

Protecing existing equipment/material or replace it with

equipment/material resistant to "new" corrosion.

Flow trim resistant to CO2 + H2O (+H2S) Corrosion

Re-Lining Options

PREFERRED

4"CSG & 2⅜"GRE-LND TBG

Op

en

GA

MA

C

em

en

ted

WELLS WITH "DRIFT PROBLEM"

3 ½"CSG & 2 ⅜"GRE-LND TBG

REQUIRED CRITICAL POINTS

CONFIRMATION BY PILOT RE-LINING

New CO2

resistant CMT

4" Re-Lining - Clearance Issue

8 ½"OH

CMT

5 ½"15.5# CSG

(ID=4.950")

4"9.5# CSG

(ID=3.548")

2 3/8" 4.6# EUE TBG

TBG Cplg OD=3.063"

GRE Liner

ID=1.810"

Flare ID=1.75"

Pilot Re-lining - Critical Points

Can 4"CSG be installed to the target depth in existing 5 ½"CSG?

??? well geometry (drift, deviation, direction…)

??? friction of stiff CSG Assy over the installation.

Can re-lining CSG be cemented as per plan?

??? clearance 5 ½" and 4" CSGs

??? Hydraulic calculation confirmation.

CSG centralization technology and techniques confirmation.

4"CSG centralisers must provide:

efficient centralization of flush joint CSG;

minimum flow resistance in the annulus between two CSGs;

centraliser installation process with no CSG damage.

CMT bond logging = ?

Perforating thru two CSGs =?

GRE-Lined tubing installation -Postponned

Žu-111

Injector with integrity

problem

CSG leak just below the

wellhead.

TBG and Inner CSGs leak

JOB SPLIT TO:

1. Integrity repair &

preparation for Relining

2. Re-lining

Pilot Re-lining - Well Candidate

CSG 5 ½" CSG 9 ⅝"

TOC @1000m

CSG 13 ⅜"

Fish#1:

@2081

Fish#2:

@2075m

LEAKING Sfc.CSG

LEAKING Prod.

5 ½"CSG @? m

LEAKING TBG @? m

Perfs: γ1-5)

1993-2071m

Rig Entry#1

Rig Entry#1: Integrity repair & preparation for Relining

TASKS:

Completion retrieving

Wellbore drifting & cleanout

Integrity repair

Suspension up to the Rig Entry#2

Completion Retrieving

1. Move in - Well Dead

2. Rig Up

3. Attempt to POOH Completion resulted in

break of TBG and 13 days of fishing.

100% of fish recovery

4. Well Drifted to HUD with FBM & Scraper

5. Old CMT Logged with CBL-CCL

9 ⅝" x 5 ½"Annulus Cementing

Leak

60-150m CMT min.

expected

150-250m

CEMENTING PLAN:

To plug 9 ⅝"x 5 ½" Ann between

9 ⅝"CSG shoe and surface

with CO2 resistant CMT

6. Perfs isolated w/ Mech. Plug

7. Leak hunting

8. Punch CSG

9. Installed retainer

10. Cemented 9 ⅝" x 5 ½" Ann (CMT

return @ surface)

11. WOC

12. CMT quality confirmed by P/Ts

Perfs: γ1-5) 1993-2071 m

Well Suspension for Rig Entry#2

5 ½"CSG shoe @2129 m

Fixed Leak

60-150m

Fixed leak @ sfc TBG HGR

TBG 2 ⅜"

WEG

13. Drillout CMT, retainer and Plug to HUD.

14. RIH kill string

15. Rig Down

Perfs: γ(1-5) 1993-2071 m

COMPLETED TASKS:

Completion retrieving

Wellbore drifting & cleanout

Integrity repair

Suspension up to the Rig Entry#2

NOT PLANNED:

13 days of FISHING

Rig Entry#2

Rig Entry#2: Re-Lining

TASKS:

"Mold-On" Centralisers installation

4"CSG Running

CMT Quality Logging

Perforating

Temporary completion installation

MOLD-ON Centralizers

Project requirements:

Efficient centralizing

Should not jeopardize CSG mech. properties

Maximizing of the flow path for CMT slurry

Should "Survive" run in hole

Solution:

Halliburton’s Protech CRBSM

Ceramic / Carbon / Fibre composite material molded onto CSG

Design adviced by manufacturer:

One centraliser (3 spiral blades ; 120 deg phasing) per one CSG joint

25 jts w/centralisers - total 312.5 m

12.5 m

min 2.5 m min 2.5 m mid of CSG jt

MOLD-ON Centralizers

6 CSG ready for shipment

3. Composite mtl.injection

5. Molds removing

Centralisers height check

1. CSG Sand Blasting 2. Molds Installation

4. Hardening ~12 hrs

Required Tmin = 18ºC 6. Centralisers Protection

Preparation for CSG Installation

1. Move in

2. Well Dead

3. Rig Up - found damaged&leaking

THS top flange

4. POOH kill string

5. RIH scraper to HUD; Circulate

with clean water

6. THS replacement:

-Perfs isolated with BP

-THS replaced with new one

CSG Assembly

7. RIH Flush Jt CSG Assy (bottom-up):

Float Shoe

Float Collar

CSG X-over

CSG 4" MSFJ, l=300 m,

w/"mold on" centralisers)

CSG & Pups 4"MSFJ

CSG X-over

CSG HGR

CSG landing jt

CSG HGR

CSG X/O

CSG 4"11.6# MSFJ C-95

1755 m

CSG 4" 11.6# MSFJ C-95

w/centralisers

4"9.5# Float Collar, VAM FJL

4"9.5# Float Shoe VAM FJL

CSG X/O

CSG INSTALLATION PRECAUTIONS

To prevent Flush CSG Drift jeopardising

Inspection in plant

Proper handling & transportation

Drifting & inspection in workshop

Re-drifting on location

Make Up torque control (Power Tong and JAM unit)

Drifting with Slick line over RIH:

1 st jt

5 th jt

10 th joint

At every 15 th joints

4"CSG Top fill with water after each SL drifting

FINAL RESULT - NO CSG DAMAGE - DRIFT IS OK!

Flush 4"CSG Installation

Žu-111 4"CSG Cementing job

Mandatory - CO2 Resistant cement

CSG HGR

CS X/O

CSG 4"11.6# MSFJ

CSG 4" 11.6# MSFJ

w/centralisers

4"9.5# FC

4"9.5# FS

CSG X/O

9. CMT job preparation

Land CSG HGR & Run in tie down bolts

N/U new THS 7 1/16"x 7 1/16"3K

10. 4" CSG Cementing

R/U CMT equipment

Pump pre-flush = PKR fluid

Pump CMT & top CMT plug

Displace up to the plug bump

4"CSG CMT Quality Logging

11. Logging Suite #1:

Run Temp.log #1 …13 hrs

Run Temp.log #2 …18 hrs

12. WOC

13. Drift 4"CSG w/FBM & Scraper

14. P/T 4"CSG to 210 bar = OK

15. Logging Suite #2:

RIH CBL+CCL - Inconclusive

16. WL Perforating

Perforated 4 bottomest intervals (22m)

Injectivity test = Poor inj.rate

Perforated top interval (9m)

Injectivity test = Good inj.rate

Temp13hr

Temp18hr

Temperature

Logs

CBL Mold on centralisers

Žu-111 Temporary injection completion

17. Installed temporary injection

completion (bottom-up):

WEG

GW PKR

TBG 2 ⅜" EU -1jt

SSD 2 ⅜"EU

TBG 2 ⅜" EU

TBG HGR

18. Closed SSD

PT PKR by inj.test = OK

19. R/D & Move off

TBG HGR

2 ⅜"TBG

4" 9.5# FC

4" 9.5"FS

CSG X/O

CSG 4"11.6# MSFJ

TOC @1435 m

PKR FLUID

from TOC

to SFC-a

CSG HGR

CSG X/O

New THS

2 ⅜" TBG -1jt

X/O

1.9" GW PKR

1.9"EU WEG

2 ⅜" SSD

New Perfs: (γ1-γ5)

1993-2071 m

Žu-111 WELLHEAD

Before After

Pilot Re-lining - CONCLUSION

Pilot re-lining successfully completed.

Suspected critical points completed as per plan:

4"CSG run to TD with no major problems

4"CSG cementing successful with pressures less than expected

Centralisers installation & RIH without problems

Centralisers confirmed in place by CBL

Adequate cementing quality confirmed by:

Job Records, Temp Logging, Pressure & Injectivity tests

Sucessful perforating thru two CSGs

GRE-Lined tubing installation postponed but techniques already

confirmed by positive experience from Middle East

Žu-111 GRE-LINED TUBING

GRE-Liner

Corrosion barrier ring

Flare

Mortar

Steel TBG

Maxtube DL-20 Tuboscope TK-Liner

GRE-LND Tubing

with Premium Cplg for

3 ½" CSG Scenario

GRE-LND Tubing

with modified gas

tight API EUE Cplg

for 4" CSG Scenario

GRE-Liner

Corrosion barrier

Teflon ring

Flare

Mortar

Steel TBG

CSG X-over 4"9.5# FC, VAM FJL

4"9.5# FS, VAM FJL

CSG 4"11.6# MSFJ

w/centralisers

CSG 4"11.6# MSFJ

Žu-111 Planned Final Status

TOC @1435m

PKR FLUID from

TOC to SFC

CSG HGR

CSG X-over

New THS

New Perfs: (γ1-γ5) 1993-2071 m

TBG HGR -Inconel

TBG X-over -Inconel

TBG X-over -Inconel

On-Off Connector -Incoloy

Retrievable PKR -Incoloy

PKR FLUID from

PKR to sfc.

GRE Lined TBG 2 3/8" EUE

(modified gas tight API Cplg)

Questions

Thanks for Your

Attention

Questions…