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Injection parameters optimization of cross-linked polymer microspheres and polymer composite flooding system

机译：交联聚合物微球和聚合物复合驱体系的注射参数优化

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Based on the facts that there is no obvious improvement in injection conformance and no significant water cut reduction in production wells after polymer flooding in S oilfield in Bohai Bay, this study used cross-linked polymer microspheres-polymer composite flooding to research the effect of chemical system composition, displacement speed, injection volume on polymer flooding by physical simulation experiments, and to optimize injection parameters of composite system. The results showed that the higher the concentration of cross-linked polymer microspheres at a total concentration of 1750 mg/L, the more the oil recovery enhancement; the 1350? 1650 mg/L polymer composite system can achieve better oil recovery when the cross-linked polymer microsphere concentration reaches 400?100 mg/L; compared with single polymer flooding, the cross-linked polymer microspheres and polymer composite system flooding can enhance recovery factor by 8%?11%; in addition, it was found that the composite system could better improve polymer flooding at the displacement rate of 3.5 m/d and the injection volume of 530 mg/L?PV.
机译：基于渤海湾S油田聚合物驱后注采一致性没有明显改善，生产井无明显减水的事实，本研究采用交联聚合物微球-聚合物复合驱研究了化学作用。通过物理模拟实验，研究了系统组成，驱替速度，对聚合物驱的注水量，并优化了复合系统的注水参数。结果表明，在总浓度为1750 mg / L的情况下，交联的聚合物微球的浓度越高，油的采收率提高越多; 1350？当交联的聚合物微球浓度达到400〜100 mg / L时，1650 mg / L的聚合物复合体系可以达到较好的采油率。与单聚合物驱相比，交联聚合物微球和聚合物复合体系驱可以提高8％〜11％的采收率。另外，发现该复合体系在驱替速率为3.5 m / d和注入量为530 mg / L？PV时能更好地改善聚合物驱。

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