Henry Lopez, Steve Metcalf, Brian Ward & Tom Watson, BJ Services
Sludging is an ever present problem in the Permian Basin. Recent studies have shown the influence of iron by-products on the sludging process. Questions have emerged concerning effects of CO2 introduction into the overall reaction. An operator concerned with this over-all process began a study to determine the influence of CO2 on the over-all system. The results of this study involving a San Andres CO2 pilot program are evaluated. Included are compatibility testing of produced oil, produced water and acid systems. Testing was conducted with and without iron injected into the system. A representative cross-section of the field lease crude and produced water was utilized. Considerations for future CO2 flood testing are discussed.