Enhanced Oil Recovery in Eagle Ford

Overview

Chemical Injection Partners (CIP) resolved severe emulsion and paraffin issues for a mid-sized Eagle Ford operator, handling 50,000 bpd of produced water. CIP’s tailored chemical treatment and on-site optimization increased oil recovery, reduced injection pressures, and cut costs, delivering significant financial and operational benefits.

Issue

• Emulsions: Tight emulsions led to 2,000 ppm oil-in-water, losing 50–100 bbl/day of oil.
• Paraffin Buildup: Wax deposits caused equipment downtime and flow issues, requiring frequent hot oiling and pigging.
• Injectivity Decline: Injection pressures neared 2,200 psi, risking production shutdowns due to oily water and solids plugging.
• High Costs: Inefficient chemical spend (~$5,000/day) and maintenance drove up expenses.

Recommended Solution

• Custom Demulsifier: Tailored to break emulsions, targeting <100 ppm oil-in-water.
• Paraffin Control: Continuous inhibitor and periodic solvent to prevent wax buildup.
• Water Clarifier: Polymer to polish water, minimizing formation damage.
• On-Site Service: Regular monitoring and dosage optimization by CIP engineers.

Work Performed

• Lab & Pilot Testing: Identified optimal chemicals via bottle tests; piloted on a test separator.
• Field Rollout: Implemented across facility with calibrated dosing pumps (25 ppm demulsifier, 30 ppm inhibitor).
• Optimization: Adjusted dosages (e.g., demulsifier to 18 ppm), monitored water quality, and resolved minor issues over 12 weeks.

Results

• Financial:
  • Recovered 45 bbl/day additional oil, adding ~$94,500/month ($70/bbl).
  • Reduced chemical costs by 16% (~$24,000/month).
  • Saved $10,000–$15,000/month on maintenance.
  • Total net gain: ~$130,000/month, with ROI exceeding 200% annually.
• Operational:
  • Oil-in-water dropped to <100 ppm, improving recovery to 99.9%.
  • Injection pressure fell 18% to 1,800 psi, restoring 10% capacity.
  • Eliminated hot oiling and reduced pigging to quarterly, ensuring stable production.
  • Enhanced water quality exceeded regulatory standards, reducing waste.

Conclusion

CIP’s targeted chemical program transformed the operator’s Eagle Ford waterflood, boosting oil recovery, stabilizing operations, and cutting costs. The partnership showcases how expert chemical management maximizes value in water-intensive oilfields.