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“十一五”以来,二类油层聚合物驱实现了由工业性试验向工业化推广应用的转变,但在工业化推广过程中,对二类油层精细地质认识不够清楚,缺乏分阶段跟踪调整方法,区块及井点间受效不均衡、层内及层间动用状况差异明显的矛盾仍然较为突出。利用精细地质研究成果,深入认识了北一二排二类油层的地质特点,通过数值模拟技术,明确了二类油层聚合物驱调整技术及措施优化设计方法,采用分注及油水井措施改造的方法减小平面、层间、井间差异。分注后油层动用状况提高6.2个百分点,油水井措施改造后,注入井平均日增注19m3,采出井平均日增油9t。二类油层平面纵向非均质性严重,在注聚不同阶段需要加大改造力度,分层注聚和调剖提高了油层的动用程度,扩大了波及体积,对改善二类油层聚驱开发效果有重要的指导意义。
Since the “Eleventh Five-Year Plan”, the second type of polymer flooding has realized the transformation from industrial test to industrialization. However, in the process of industrialization promotion, the fine geological understanding of the second type reservoirs is not clear enough and there is a lack of follow-up and adjustment Methods, blocks and well points ineffective imbalance between layers and the use of different layers of the obvious differences between the still prominent. Based on the detailed geologic research results, the geological characteristics of the first and second row of reservoirs in the second and second row are deeply understood. Based on the numerical simulation technique, the polymer flooding regulation technology and the optimal design method of the second type reservoir are clarified. Method to reduce the plane, interlayer, well differences. After the injection, the utilization of oil layers increased by 6.2%. After the oil and water wells were rebuilt, the injection wells averaged 19 m3 per day and the average daily oil production increased by 9 tons. The longitudinal heterogeneity of the second type of reservoir is serious, so it is necessary to intensify the reforming efforts in different stages of injection and formation. The stratified injection and profile control improve the utilization of the reservoir and enlarge the volume of spallation. Have important guiding significance.