CAJ | 학술논문

针对聚合物驱过程中窜聚影响聚合物驱效果的现象，开展了聚合物溶液在注入过程中和突破后对吸水剖面改善能力的双管并联岩心驱替实验。对比分析了水驱、恒速聚驱和变速聚驱对吸水剖面的影响程度，绘制了填制不同渗透率岩心所用不同粒径石英砂含量配比图；并通过考虑管线和填砂管端面引起的压力损失对室内计算渗透率进行了改进。结果表明：水驱速度小于2 mL／min时，高低渗分流比远大于渗透率级差，大于4 mL／min分流比与级差吻合；恒速聚驱时在聚合物注入过程中能够有效的改善吸水剖面，但一旦产出端见聚，吸水剖面将会迅速翻转。聚驱速度小于2 mL／min时，高低渗分流比也大于渗透率级差；但比水驱影响小很多。大于4 mL／min时与水驱相同，合理控制注聚速度对聚合物驱提高采收率意义重大。
침대취합물구과정중찬취영향취합물구효과적현상，개전료취합물용액재주입과정중화돌파후대흡수부면개선능력적쌍관병련암심구체실험。대비분석료수구、항속취구화변속취구대흡수부면적영향정도，회제료전제불동삼투솔암심소용불동립경석영사함량배비도；병통과고필관선화전사관단면인기적압력손실대실내계산삼투솔진행료개진。결과표명：수구속도소우2 mL／min시，고저삼분류비원대우삼투솔급차，대우4 mL／min분류비여급차문합；항속취구시재취합물주입과정중능구유효적개선흡수부면，단일단산출단견취，흡수부면장회신속번전。취구속도소우2 mL／min시，고저삼분류비야대우삼투솔급차；단비수구영향소흔다。대우4 mL／min시여수구상동，합리공제주취속도대취합물구제고채수솔의의중대。
For the polymer channeling phenomenon affecting polymer flooding effect, two parallel tube core dis-placement experiment is done to study the ability of suction profile to be improved in the injection process and after the breakthrough of the polymer solution.Based on the experimental results, the influence of injection profile of the water driving, constant speed and variable speed for polymer flooding were analyzed, the quartz sand content to dif-ferent permeability cores with different diameter ratio was maken, and the permeability measurement mothed by considering the loss of pressure improved.The results indicate that the diversion ratio is greater than the permeabili-ty differential when water driving speed is less than 2 mL/min and the diversion ratio equals the permeability differ-ential when the speed more than 4 mL/min.The injection profile can be effectively improved in the process of poly-mer, then the profile will quickly reverse once polymer flowing in the output end.The diversion ratio of polymer flooding is similar with water driving.Reasonable polymer injection speed is of great significance to improve the pol-ymer flooding recovery.