Abstract One of the most widely applied enhanced oil recovery processes is the polymer flooding, in which aqueous solution of polymer viscosifier is introduced in oil reservoirs to increase the recuperation of the remaining oil. From the current challenges of this process, it can be referred to a high cost of materials regarding their substantially required amount and the low impact on the mobility ratio during the process due to the reduction of solution viscosity at high temperatures and high salinity environments. The purpose of this study is to investigate the concept of acrylamide-based thermosassociating copolymer (TAP), with a specific morphology and chemistry (hydrophilic main backbone made of polyacrylamide with grafted amide functionalized pending chains) as viscosity enhancer at harsh conditions of high temperature and salinity. For that aim, a specific TAP microstructure was targeted (very high molar mass linear polymer chains with improved copolymer homogeneity). It is achieved in this study throughout applying the reaction engineering approach, such as synthesis in semi-batch mode or/and in heterogeneous dispersed media. As a result, the synthesized TAP presented excellent behavior as viscosity enhancer especially under high temperature and salinity conditions with improved performance in comparison to TAP synthesized by a conventional solution polymerization approach and to actual commercial high molar mass acrylamide-based polymer.

中文翻译：

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作为聚合物驱油采收增粘剂的高摩尔质量丙烯酰胺-共-双丙酮丙烯酰胺接枝共聚物

摘要 聚合物驱是应用最广泛的提高采收率工艺之一，在油藏中引入聚合物增稠剂水溶液以提高剩余油的回收率。从该工艺目前面临的挑战来看，由于在高温和高盐度环境下溶液粘度的降低，材料的实际需要量和对迁移率的影响很小，这可以归结为材料的高成本。本研究的目的是研究丙烯酰胺基热缔合共聚物 (TAP) 的概念，它具有特定的形态和化学性质（由聚丙烯酰胺制成的亲水主骨架，带有接枝酰胺官能化挂链）作为高温和高温条件下的粘度增强剂。盐度。为此，以特定的 TAP 微观结构为目标（具有改进的共聚物均质性的非常高摩尔质量的线性聚合物链）。在本研究中，通过应用反应工程方法实现了这一目标，例如以半间歇模式或/和非均相分散介质合成。因此，合成的 TAP 作为粘度增强剂表现出优异的性能，尤其是在高温和盐度条件下，与通过常规溶液聚合方法合成的 TAP 和实际商业高摩尔质量丙烯酰胺基聚合物相比，性能有所提高。例如以半分批模式或/和在异质分散介质中合成。因此，合成的 TAP 作为粘度增强剂表现出优异的性能，尤其是在高温和盐度条件下，与通过常规溶液聚合方法合成的 TAP 和实际商业高摩尔质量丙烯酰胺基聚合物相比，性能有所提高。例如以半分批模式或/和在异质分散介质中合成。因此，合成的 TAP 作为粘度增强剂表现出优异的性能，尤其是在高温和盐度条件下，与通过常规溶液聚合方法合成的 TAP 和实际商业高摩尔质量丙烯酰胺基聚合物相比，性能有所提高。