Polymer flooding has been established as an effective enhanced oil recovery (EOR) technique and can be utilized in large-scale field expansions. With high success rates and efficiency, polymer flooding operates by increasing the viscosity of water, promoting greater sweep efficiency and resulting in higher oil recovery beyond conventional waterflooding. Predicting viscosity has been established by numerous researchers as an essential tool to study polymers behavior under varying conditions. Previous model has proven a link between polymer viscosity and zero shear rate viscosity, relaxation time, hardness, and many other factors. This research initially reviews different types of polymers that can be applied successfully in EOR, demonstrate conditions that can alter polymer viscosity in porous medium, and analyze models that predict polymer bulk and in situ viscosity. The research then discusses a novel modification of the power law model to predict HPAM (SAV10) viscosity in a wide range of shear rates based on polymer concentration, fluid salinity, and divalent content. A polymer rheology study was carried out on SAV10 at various concentrations (750–5000 ppm) and brine salinities (43–210 k ppm). Results show the effectiveness of the model and the ability to predict viscosity accurately in low to medium shear rates, while in high shear rate, a slight deviation was noticeable.

中文翻译：

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开发新模型以预测HPAM粘度并影响浓度，盐度和二价含量

聚合物驱已被确立为一种有效的提高采油率（EOR）的技术，可用于大规模的油田扩展。凭借高成功率和高效率，聚合物驱油可通过增加水的粘度，提高扫油效率并导致比常规注水技术更高的采油率来进行操作。预测粘度已被众多研究人员确定为研究聚合物在不同条件下行为的必不可少的工具。先前的模型已经证明了聚合物粘度和零剪切速率粘度，松弛时间，硬度和许多其他因素之间的联系。这项研究最初对可以成功用于EOR的不同类型的聚合物进行了综述，论证了可以改变多孔介质中聚合物粘度的条件，并分析可预测聚合物体积和原位粘度的模型。然后，该研究讨论了幂定律模型的一种新颖修改，以基于聚合物浓度，流体盐度和二价含量来预测各种剪切速率下的HPAM（SAV10）粘度。在SAV10上以各种浓度（750-5000 ppm）和盐水盐度（43-210 k ppm）进行了聚合物流变学研究。结果显示了该模型的有效性以及在低至中剪切速率下准确预测粘度的能力，而在高剪切速率下，则存在轻微偏差。在SAV10上以各种浓度（750-5000 ppm）和盐水盐度（43-210 k ppm）进行了聚合物流变学研究。结果显示了该模型的有效性以及在低至中剪切速率下准确预测粘度的能力，而在高剪切速率下，则存在轻微偏差。在SAV10上以各种浓度（750-5000 ppm）和盐水盐度（43-210 k ppm）进行了聚合物流变学研究。结果显示了该模型的有效性以及在低至中剪切速率下准确预测粘度的能力，而在高剪切速率下，则存在轻微偏差。