コア掃攻テストによるマイセラー•ポリマー攻法の評価
サリニティ•グラディエントの効果
1986 年 51 巻 4 号 p. 261-271
詳細
1986 年 51 巻 4 号 p. 261-271
Laboratory model experiment of micellar polymer flooding was carried out by core flood. In this experiment, berea sandstone and n-dodecane were used. Results were evaluated by means of
1) analysis of viscous behavior of injecting fluids
2) chemical analysis of effluent, and
3) measurement of surfactant retention.
The displacement mechanism of micellar polymer flooding was also discussed.
By the analysis of viscous behavior of injected fluid, the movements of the mixing zone of microemulsion and the oil bank were explained. It was found that the existence of microemulsion in the middle phase would cause an increase of the oil recovery, and that the salinity gradient would play an important role for keeping microemulsion in the middle phase.
As discussed here, both mobility control of injected fluid and control of phase behavior are very important to increase the displacement efficiency in micellar polymer flooding.
