Research on development factors affecting oil recovery of polymer flooding

摘要

Polymer flooding after water flooding has become an effective method to develop conventional oil reservoirs, but there is a lack of research on development factors affecting oil recovery of polymer flooding, which has guiding significance to carry out subsequent water flooding. Author builds an ideal model that has an injection well and four oil recovery wells, applying CMG-STARS to conduct numerical simulation, analyzing including polymer dosage, injection speed, injection concentration, water cut before polymer injection, the oil saturation before polymer injection, well spacing, and other development factors, which affects oil recovery. Simulation results show that the polymer dosage, injection concentration and the water cut before polymer injection have greater impact on the recovery, and exactly match indoor artificial core physical simulation test results.