聚合物驱阶段注采动态特征及影响因素分析

Analysis on Features and Influencing Factors of Injection-production Performance during Polymer Flooding

根据不同的注聚合物时机,建立海上聚合物驱见效时间判断标准,在确定见效时间的基础上,将油井注聚合物后的生产阶段划分为见效前期、见效明显期和见效结束期。对注入井和生产井的动态分析发现,不同生产阶段表现出的动态特征不同,在此基础上,运用灰色关联度评价法定量评价了油藏注入能力和产出能力的影响因素,由此得到影响注入能力和产出能力的主控因素。该研究为油田调整措施的制订和实施提供了可靠的依据。

Depending on polymer injection time,the criteria are established for judging response time of polymer flooding in offshore oilfields. Given the response time,the production period after polymer is injected is divided into early response stage,effective response stage,and terminal response stage. The performance analyses of injection and production wells indicate that different features are captured in each production stage. Grey relational degree evaluation is utilized to quantitatively evaluate the influencing factors of reservoir injection and production capacities according to the performance analyses and the major controlling factors are identified.This research can provide reliable reference for the design and implementation of oilfield adjustment measures.