用于提高油田采收率的聚合物降解与防护

聚合物驱油是目前工业化应用程度最高的提高采收率三次采油方法，注入溶液的性能指标直接影响聚合物的增油效果，聚合物溶液的降解和防护已引起石油科技工作者的广泛关注。通过大量的室内实验和现场试验对聚合物驱油可能引起的机械降解、化学降解和生物降解进行了详细分析，对如何做好聚合物溶液降解的防护提出了可操作性的措施，在胜利油田应用后取得了预期的聚合物粘度保护效果，这对我国高含水油田聚合物驱油的广泛推广应用具有重要的现实意义。

Degradation and Protection of Polymer Used for Enhancing Oil Recovery Rate

At present, polymer flooding is a tertiary oil recovery method used abroad in oilfield for enhancing oil re covery rate. The performance indexes of polymer solution directly affect the oil increase effect of polymer, and the degradation and protection of polymer solution have brought the broad attention of petroleum scientific workers. The paper has analyzed the mechanical degradation, chemical degradation and biodegradation induced by polymer flooding in laboratory experiment and field test, and brought the operable measures for protection of polymer solution degra- dation. The measures have been used in Shengli Oilfield, and obtained the expectant results for polymer viscosity protection, it is very important to extend the technology of polymer flooding in high water-bearing oilfields.