正交设计在聚合物/表面活性剂复合驱参数设计中的应用

摘要

Based on the laboratory evaluation and pilot test study,and in combination with oil properties and development features of a certain oilfield,a orthogonal design method was applied to optimize injection parameters of polymer-surfactant flooding,such as injection rate,slug volume,polymer concentration,surfactant concentration,injection-production ratio,etc.The results show that when evaluation indexes are improving recovery factor and incremental oil per ton of polymer,higher injection rate and injection-production ratio have negative effects.In the design concentration range,the polymer concentration has no significant effect on these indexes,and the slug volume and surfactant concentration are main influencing factors.On basis of the comprehensive analysis,the two main factors need to be further optimized.The study is helpful to the oilfield practice of the polymer-surfactant flooding.%在室内配方和先导性矿场试验研究的基础上,结合某油田的油品性质及开发特点,应用正交设计方法进行实验方案设计,对影响聚合物/表面活性剂二元复合驱开发效果的注入速度、段塞量、聚合物浓度、表面活性剂浓度、注采比等因素进行了敏感性分析。研究结果表明：以提高采收率和当量吨聚增油量为评价指标,较高的注入速度及注采比对结果不利;在设计的聚合物浓度范围内,聚合物浓度对指标影响不显著,注入段塞量及表面活性剂浓度是主要影响因素,在综合分析的基础上需进一步优化。该研究成果为该区块的合理开发提供了理论依据,对于采用聚合物/表面活性剂二元复合驱提高挖潜能力,改善开发效果具有重要意义。