高浓度聚合物调剖技术在三元复合驱中的应用及效果评价

Application and Effect Evaluation of Profile Modification Technology for High Concentrated Polymer in ASP Flooding

为改善三次采油开发效果,调剖技术作为一项重要技术已被广泛应用,但在三元复合驱中应用较少。在注入三元体系前需要对层间矛盾突出的井开展深度调剖。通过在室内开展高浓度聚合物深度调剖适应性论证及对现场实施效果分析表明,高浓度2500万分子量聚合物溶液能够适应萨南油田一类油层,注入三元体系前通过高浓度聚合物深度调剖可有效调整吸水剖面,改善油层吸水状况,减小层间差异,非调剖层得到动用,采出井达到明显增油降水效果。

In order to improve the development effect of tertiary oil recovery, profile control technology becomes the important technology has been widely used,but it is seldom used in alkaline-surfactant-polymer （ASP） flooding.Before the ASP flooding,we need to carry out depth profile control for the wells with serious contradiction among layers.From carrying out the depth profile control adaptation demonstration with high-concentration polymer in the laboratory test and effect of field application,it can be seen that high concentration of 25 million weight polymer solution can adapt to the class of Sanan oilfield, it can effectively adjust the water injection profile by the high concentration polymer depth profile control before the ASP flooding, improve oil absorbent state, reduce the difference between layers, and use the layer of non-profile.The results show that the recovery oil has the significant effect of increasing oil production and decreasing water.