一种聚合物地下黏度计算新方法

An Innovative Technique to Determine Underground Viscosity of Polymer

目前常采用经验法计算聚合物驱油田聚合物地下黏度,但该方法仅能得到黏度范围,而非特定数值。针对该问题,通过聚合物驱渗流公式转换及油藏工程理论等,建立了聚合物地下黏度与井口注入压力、累计注入聚合物量间的关系,提出了一种求解聚合物地下黏度的新方法。实例表明,新方法得到的渤海L油田4口注聚合物井的聚合物黏度分别为3.79、5.19、2.48、6.37,与常规方法计算结果基本一致,与经验法相比,可以得到精确数值。该研究对注聚合物油田措施调整起到理论指导作用。

Currently,empirical methods are frequently used to determine underground viscosity of polymer deployed in polymer flooding operations.Instead of specific values,these methods can only determine extend of viscosity.Under such circumstances,polymer flooding seepage formula conversion and reservoir engineering theories were used jointly to highlight the correlation among underground viscosity of polymer,wellhead injection pressure and cumulative polymer injection volumes.In this way,an innovative technique to determine underground viscosity of polymer has been developed.Field application results show the polymer viscosity determined by using the technique in 4 wells with polymer flooding operations in the Bohai L Oilfield are 3.79,5.19,2.48 and 6.37,respectively.These values coincided well with results determined by using conventional technologies.Compared with empirical methods,the new technique can drive more accurate values.Relevant researches may provide necessary theoretical guidance for adjustment of polymer flooding operations in relevant oilfields.