welllock ® resin system. 2 © 2013 halliburton. all rights reserved. welllock ® resin system –...

WellLock® Resin System

2© 2013 Halliburton. All rights reserved.

WellLock® Resin System – Applications

Remediation– Low viscosity– Penetrates Micron-sizes pores– Resists Gas Channeling

Secondary Annular Barrier– Increased elasiticity– High-pressure seal– Compressive Strength

Plug to Abandon– Tolerates impurities– Withstand high-pressure differentials

Injection (Disposal) Wells– Fluid compatibility (including water)– Chemical and corrosion resistant

Stress: 4500 psiStrain: 50%



High pressure seal (1,000 psi/ft) Chemically resistant (acid/CO2) Withstands contamination (overcomes inefficient mud

displacement) Increased elasticity

(up to 20%) Compressive

strength (5 to 15 kpsi)

No yield point as a liquid Drillable



A cross-linking reaction between an amine hardener and epoxides, resulting in a cured three-dimensional infinite polymer network.

• Control of reaction rate achieved through chemistry

• Adjust accelerator concentration to achieve desired pumptime and compressive strength development

• longer working times lead to longer compressive strength development


WellLock® Resin System HPHT Thickening Time Chart at 175°F


WellLock® Resin System – Rheological Behavior

Newtonian

Herschel-Bulkley/Bingham Plastic


WellLock® Resin SystemWhen tested in an environmental chamber at a downhole temperature of 162°F (72°C), WellLock resin achieved 12,500 psi and remained highly elastic.

®


WellLock® Resin SystemAnnular Hydraulic Seal Test

System constructed from 1 ft pipe nipple with steel bar welded into center

Test fluid chamber and test cell can be immersed in a water bath for temperature control

WellLock® resin system completely prevented flow at 1,000 psi fluid pressure


Complements cement

High pressure seal

Chemically resistant

Withstands impurities

Increased ductility

Compressive strength


Resin Film

Cement

Casing

Formation


WellLock® Resin SystemLead resin slurry deposits film on formation and casing resulting in dramatic shear bond improvements.


WellLock® Resin System Mud Contaminated Compressive Strength

Cure Temperature = 180°FNeat Resin 10% Mud 20% Mud

24 hr. comp. strength 5300 psi 1000 psi 520 psi48 hr. comp. strength 7400 psi 4300 psi 1700 psi

15.2 lb/gal WellLock® Resin

15.0 lb/gal synthetic based mud


WellLock® Resin – Properties Comparison

Properties WellLock®

ResinEPSEAL® Sealant

Epoxy Resin √ √Chemical and Corrosion Resistance √ √

High Shear Bond √ √

High Compressive Strength √ √

Gas Impermeable √ √

Elastic Resilient Sheath √ √

Fluid Compatibility √

WellLock Resin

Water


WellLock® Resin SystemField Blending and Placement Job type

– Secondary barrier– Remediation

Planning – Current wellbore conditions– Placement time – Fluid train – Compatibility– Spacers

Placement – Batch mix components– HT-400™ pump– Coiled tubing– Drill string– Tubing


Remedial work where particle-laden fluids are unable to penetrate problem areas.


Tight Casing Leaks Gravel Packs

Before: water breakthrough in gravel pack After: Resin penetrates for impermeable seal


Offshore Challenge– Produced water interfering

with production and creating disposal costs

– Potential for on-going casing erosion due to gravel-pack flow back

Suggested Solution – Squeeze job– WellLock® Resin (6 bbl)

Anticipated Result– Resin placed at the

breakthrough area– Water cut eliminated

WellLock® Resin System – ApplicationRemediation


Secondary annular barrier to help maintain long term wellbore integrity during aggressive completion operations.



Shale-Play Challenge– High-concentration of fracture placement– Increased regulatory focus on fracture stimulation– Environmental sensitivities regarding water table

Suggested Solution – Three-stage cementing operation inclusive of secondary barrier

– Lead cement (50 to 100 bbl)

– WellLock® Resin (20 bbl)

– Tail cement (50 to 100 bbl of LifeCem™ Cement)

Anticipated Result– Casing-to-casing barrier– Corrosion resistant, gas-

impermeable seal– Environmental sustainability

WellLock® Resin System – Application Secondary Barrier


Plug and Abandonment


Withstands impurities during placement

High bond strength Withstands extremely

high pressure differentials


WellLock® Resin System – From the Field

Challenge – Multiple conventional P&A attempts failed

(continuous bubbles rising to the surface due to small leak in the annulus between the 30-in.drive pipe and the 20-in.conductor pipe)

– Costs accruing as rig is unable to move off of well until tests proved successful P&A

Solution: WellLock® Resin / 2 different operations– 10 bbl squeeze application– 50-ft resin plug set in the 13.3/8 casing

Result– Successful bubble test (bubbles ceased) allowing

plug operation to proceed– Successful Plug operation allowed casing to be cut – Well permanently abandon and rig moved to next well



Challenge: Salt (brine) Cavern– Micro-annulus on the back side of the production casing with leak off

rate in the <100 bbls/year– Unable to pass MIT

Solution: WellLock® Resin – Bradenhead squeeze from

the top of the annulus– Extremely tight microannulus

accepted only 0.6 bbl of resin via surface valve

Results– Rain during operations did not negatively affect resin (unlike

conventional epoxies)– Passed an MIT gradient of .86-.87 ppg– Expense of running / cementing an additional pipe string avoided



Challenge: Marcellus Shale Annular Pressure Buildup

– Having cemented the intermediate casing, the well registered gas flowing to surface

– Operator chose to suspend drilling next stage until successfully remediating for APB

Solution: WellLock® Resin (solids free / neat resin)

– Perforated and set packer at 933 ft.– Squeeze application fluid train:

water (20 bbl) WellLock resin (10 bbl) FineCem™ cement (6 bbl)

Results – First ever application involving displacement of resin by cement

– Formation accepted all 10 bbl of WellLock Resin– Pumping pressure drop observed when resin

reach the perforations– Annular gas flow dropped throughout operations– Drill-out began 60 hours after the operation –

zero gas flow detected



Challenge: Shale - Annular Pressure Buildup on the intermediate casing.

Solution: Three-stage WellLock® Resin operation

1. Set drillable bridge plug, perforate, set retainer, squeeze 10 bbl resin into perfs followed by10 bbl FineCem™ cement

2. Perforate higher, set retainer, squeeze 10 bbl resin into perfs followed by 20 bbl FineCem cement into perfs

3. Perforate higher, set retainer, squeeze 10 bbl resin into perfs followed by 20 bbl FineCem cement

Results – Formation accepted all resin, leaving planned

amount of FineCem cement in casing at each stage – easily drilled out

– Gas flow on the backside eliminated



Challenge: Shale / Continental Europe– Drilling suspended due to damaged inflatable

packer in 4½-in. and 9-5/8-in. annulus

– Unable to achieve pressures needed for fracture stimulation operations to complete the well and bring it onto production

Solution: WellLock® Resin – Using coiled tubing, place 1.5 cubic meters of

WellLock above drillable bridge plug previously set in 4½-in. casing below leak

– Open 9-5/8-in. annulus to circulate 1 cubic meter of resin through leak into annulus leaving 0.5 cubic meters in casing

– Allow to cure Results

– Resin withstood pressure test of 7500 psi and was successfully milled out

– Drilling operations resumed


WellLock® Resin System: Halliburton Firsts

First time to successfully displace a resin with a cement– Partial immiscibility allows resin to stay isolated from

the slurry and develop high strength – Resin system remains pure and uncontaminated,

forming a gas-impermeable infinite polymer network Gas flow completely shut down


WellLock® Resin System – Summary

As a product:– Enhances the long term integrity of

the well– Unique mechanical properties and

chemical resistance– Rheological profile leads to deep

penetration into tight crevices

As a service:– Engineering and planning to

customize design for maximum usage and effectiveness of material

– Laboratory support from Houston Technology Center

As a solution: – Addresses gas migration– Non-porous secondary barrier

welllock ® resin system. 2 © 2013 halliburton. all rights reserved. welllock ® resin system –...

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