1 / 26

WellLock ® Resin System

WellLock ® Resin System. 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

orien
Download Presentation

WellLock ® Resin System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. WellLock®Resin System

  2. 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 psi Strain: 50%

  3. WellLock® Resin System • 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

  4. WellLock®Resin System 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

  5. WellLock®Resin System 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

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

  7. WellLock®Resin System – Rheological Behavior Herschel-Bulkley/ Bingham Plastic Newtonian

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

  9. 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

  10. WellLock®Resin System • Complements cement • High pressure seal • Chemically resistant • Withstands impurities • Increased ductility • Compressive strength Resin Film Cement Formation Casing

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

  12. WellLock®Resin System Mud Contaminated Compressive Strength • 15.2 lb/gal WellLock®Resin • 15.0 lb/gal synthetic based mud

  13. WellLock® Resin – Properties Comparison Water WellLock Resin

  14. 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

  15. WellLock®Resin System Remedial work where particle-laden fluids are unable to penetrate problem areas. • Tight Casing Leaks • Gravel Packs After: Resin penetrates for impermeable seal Before: water breakthrough in gravel pack

  16. 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

  17. WellLock®Resin System Secondary annular barrier to help maintain long term wellbore integrity during aggressive completion operations.

  18. 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

  19. WellLock®Resin System Plug and Abandonment • Withstands impurities during placement • High bond strength • Withstands extremely high pressure differentials

  20. 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

  21. WellLock®Resin System – From the Field • 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 fromthe top of the annulus • Extremely tight microannulusaccepted only 0.6 bblof 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

  22. WellLock®Resin System – From the Field • 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

  23. WellLock®Resin System – From the Field • Challenge: Shale - Annular Pressure Buildup on the intermediate casing. • Solution: Three-stage WellLock®Resin operation • Set drillable bridge plug, perforate, set retainer, squeeze 10 bblresin into perfsfollowed by10 bblFineCem™ cement • Perforate higher, set retainer, squeeze 10 bblresin into perfs followed by 20 bblFineCem cement into perfs • Perforate higher, set retainer, squeeze 10 bblresin into perfs followed by 20 bblFineCem cement • Results • Formation accepted all resin, leaving planned amount of FineCemcement in casing at each stage – easily drilled out • Gas flow on the backside eliminated

  24. WellLock®Resin System – From the Field • 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

  25. 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

  26. 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

More Related