OIL & GAS
- Oil & gas
Enhanced Oil Recovery
Polymer flooding is the most widely used Chemical Enhanced Oil Recovery (CEOR) method. It is relatively simple to apply and has a long history of successful field applications. Field implementation requires specialized mixing and injection equipment to avoid polymer degradation and viscosity loss. Most CEOR technologies require the addition of polymer for mobility control.
Polymer is added to the injection water to increase viscosity which improves sweep efficiency and provides mobility control between water and oil. Polymer flooding can yield a significant increase in oil recovery compared to conventional waterflooding. Polymer is mixed and injected continuously for an extended period of time until about 30 to 50 percents of the reservoir pore volume in the project area have been injected. The polymer slug is followed by continued long-term waterflooding to drive the polymer slug and the oil bank in front of it toward the production wells.