The basis of this study is to identify the versatility of N,N,N′-trimethyl-N′-tallow-1,3-diaminopropane (DTTM) surfactant in high saline environments. The surfactant was examined with sodium chloride, NaCl, to understand how triggers such as salt, pH, temperature, and surfactant concentration influences the viscoelastic response of the surfactant solution. The DTTM surfactant and salt (NaCl) concentrations used in steady-state shear viscosity analysis range from 0.2 wt% to 2 wt% and 5 wt% to 25 wt%, respectively. Along with DTTM results, three similar chemical structures are investigated to understand how viscosity changes with alterations in tail and head group composition. It was found that DTTM surfactant has the capability of transitioning from a foam-bearing to viscoelastic state at low surfactant concentrations under moderate to high saline conditions. A longer tail length promotes viscoelasticity and shear-thinning behavior. Terminals consisting of hydroxides or ethoxylates have a lower viscosity than that of methyl terminals. A head group consisting of two nitrogen atoms has a higher viscosity than those containing one nitrogen atom. The rheological characterization of DTTM presented in this paper is part of a larger study in determining the capability of this surfactant to foam CO₂ for improving mobility control in CO₂ enhanced oil recovery in high saline oil formations.

中文翻译：

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用于控制烃类储层流体流动性的烷基胺表面活性剂的系统流变研究

这项研究的基础是确定N，N，N'-三甲基-N的多功能性高盐环境中的′-牛油-1,3-二氨基丙烷（DTTM）表面活性剂。用氯化钠NaCl检查了表面活性剂，以了解盐，pH，温度和表面活性剂浓度等触发因素如何影响表面活性剂溶液的粘弹性响应。稳态剪切粘度分析中使用的DTTM表面活性剂和盐（NaCl）浓度分别为0.2 wt％至2 wt％和5 wt％至25 wt％。除DTTM结果外，还研究了三种相似的化学结构，以了解粘度如何随着尾巴和头基组成的变化而变化。发现DTTM表面活性剂具有在中度至高盐度条件下在低表面活性剂浓度下从泡沫状态转变为粘弹性状态的能力。较长的尾巴长度可促进粘弹性和剪切稀化行为。由氢氧化物或乙氧基化物组成的末端具有比甲基末端低的粘度。由两个氮原子组成的头部基团的粘度高于含有一个氮原子的头部基团的粘度。本文介绍的DTTM的流变学表征是确定该表面活性剂使CO发泡能力的一项较大研究的一部分₂用于改善CO _2的流动性控制，可提高高盐油地层中的采油率。