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Anionic/Nonionic Surfactant Mixture for Enhanced Oil Recovery through the Investigation of Adsorption, Interfacial, Rheological, and Rock Wetting Characteristics
Energy & Fuels ( IF 5.2 ) Pub Date : 2021-02-03 , DOI: 10.1021/acs.energyfuels.0c03767 Himanshu Kesarwani 1 , Amit Saxena 1 , Ajay Mandal 2 , Shivanjali Sharma 1
Energy & Fuels ( IF 5.2 ) Pub Date : 2021-02-03 , DOI: 10.1021/acs.energyfuels.0c03767 Himanshu Kesarwani 1 , Amit Saxena 1 , Ajay Mandal 2 , Shivanjali Sharma 1
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Surfactant adsorption is a major problem encountered with the surfactant polymer flooding. A lot of additives have been used in this regard to tackle this problem. In the present study, a mixture of a nonionic and an anionic surfactant was used to investigate its effect on the various aspects of the surfactant polymer flooding. The effect of temperature and the nonionic surfactant concentration on the critical micelle concentration of the anionic surfactant was explored. The adsorption behavior of the surfactant mixture on the sand particles was explored by comparing the initial and final concentrations of the surfactant mixture. The adsorption data were fitted in the different adsorption isotherms (Langmuir, Freundlich, and Temkin). The interfacial property and the rock wetting characteristics of the surfactant mixture were investigated by measuring the surface tension and contact angle, respectively. Next, the viscosity of the chemical slug (surfactant and polymer) was analyzed at different temperatures. The viscosity results were fitted in the power law model to understand the fluid flow behavior. Finally, the sand pack flooding experiments were performed using the chemical slug composed of a surfactant mixture and an industrial-grade polymer. In all the experiments, the binary surfactant mixture outperforms the individual surfactants and efficiently reduced the surfactant adsorption by 63%. Also, the binary surfactant mixture achieved an ultralow interfacial tension value of 0.0097 mN/m. The chemical slug composed of the binary surfactant and polymer was able to recover up to 76% of the total oil.
中文翻译：
通过研究吸附，界面，流变和岩石润湿特性来提高采收率的阴离子/非离子表面活性剂混合物
表面活性剂吸附是表面活性剂聚合物驱油遇到的主要问题。在这方面已经使用了许多添加剂来解决这个问题。在本研究中，使用非离子和阴离子表面活性剂的混合物来研究其对表面活性剂聚合物驱的各个方面的影响。探索了温度和非离子表面活性剂浓度对阴离子表面活性剂临界胶束浓度的影响。通过比较表面活性剂混合物的初始浓度和最终浓度，探索了表面活性剂混合物在砂粒上的吸附行为。将吸附数据拟合到不同的吸附等温线（Langmuir，Freundlich和Temkin）中。通过测量表面张力和接触角分别研究了表面活性剂混合物的界面性质和岩石润湿特性。接下来，在不同温度下分析化学块料（表面活性剂和聚合物）的粘度。将粘度结果拟合到幂律模型中以了解流体流动行为。最后，使用由表面活性剂混合物和工业级聚合物组成的化学块进行了填沙实验。在所有实验中，二元表面活性剂混合物的性能均优于单个表面活性剂，并有效降低了63％的表面活性剂吸附。同样，二元表面活性剂混合物达到0.0097mN / m的超低界面张力值。
更新日期：2021-02-18
中文翻译：
通过研究吸附，界面，流变和岩石润湿特性来提高采收率的阴离子/非离子表面活性剂混合物
表面活性剂吸附是表面活性剂聚合物驱油遇到的主要问题。在这方面已经使用了许多添加剂来解决这个问题。在本研究中，使用非离子和阴离子表面活性剂的混合物来研究其对表面活性剂聚合物驱的各个方面的影响。探索了温度和非离子表面活性剂浓度对阴离子表面活性剂临界胶束浓度的影响。通过比较表面活性剂混合物的初始浓度和最终浓度，探索了表面活性剂混合物在砂粒上的吸附行为。将吸附数据拟合到不同的吸附等温线（Langmuir，Freundlich和Temkin）中。通过测量表面张力和接触角分别研究了表面活性剂混合物的界面性质和岩石润湿特性。接下来，在不同温度下分析化学块料（表面活性剂和聚合物）的粘度。将粘度结果拟合到幂律模型中以了解流体流动行为。最后，使用由表面活性剂混合物和工业级聚合物组成的化学块进行了填沙实验。在所有实验中，二元表面活性剂混合物的性能均优于单个表面活性剂，并有效降低了63％的表面活性剂吸附。同样，二元表面活性剂混合物达到0.0097mN / m的超低界面张力值。
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