Geochemical Analysis of Hardness on the Adsorption of Surfactants in Carbonates under Severe Thermodynamic Conditions: Surface Complexation Modeling Approach

IF 2.6 3区 工程技术 Q3 ENERGY & FUELS
I. Khurshid, Yacine Addad, I. Afgan
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引用次数: 0

Abstract

Several core-flooding-based experimental studies demonstrated the effect of calcium and magnesium ions and it is found that these hard ions have detrimental effects on oil recovery during chemical EOR operations. However, studies regarding the coupled effect of hard ions and surfactant adsorption are very limited. Thus, this study aims to present a novel approach that can capture mineral-brine, brine-oil, and brine-surfactant interactions in the presence of hard ions (Ca+2 and Mg+2). Also, we introduced four oil/surfactant-based surface complexation geochemical reactions (SCGR) in the presence of hard ions for the first time to analyze the oil-surfactant interactions. The developed thermodynamic-based geochemical model is compared and validated with recent core flooding data. Our results illustrate that the use of oil-surfactant SCGR is important and should be captured for detailed surfactant adsorption. Thus, we observed that in the presence of hard ions, surfactant adsorption increases with the temperature rise, which is due to the increase in kinetic energy. We also observed that a reduction in hardness reduces the adsorption of surfactants. Additionally, increasing surfactant concentration led to a minor increase in the adsorption of surfactant with a significant increase in its concentration in the discharge/effluent. Therefore, the hard ions (Ca+2 and Mg+2) concentration has a substantial negative effect, as they reduce the solubility of surfactant and increases its adsorption. Furthermore, the lowest level of surfactant adsorption was accomplished by injecting ten times diluted water (< 0.070 mg/g).
苛刻热力学条件下表面活性剂在碳酸盐中吸附硬度的地球化学分析:表面络合模型方法
几项基于岩心驱的实验研究证明了钙离子和镁离子的影响,并发现这些硬离子对化学EOR操作期间的采油有不利影响。然而,关于硬离子和表面活性剂吸附的耦合效应的研究非常有限。因此,本研究旨在提出一种新的方法,可以在硬离子(Ca+2和Mg+2)存在的情况下捕获矿物盐水、盐水油和盐水-表面活性剂的相互作用。此外,我们首次介绍了四种在硬离子存在下基于油/表面活性剂的表面络合地球化学反应(SCGR),以分析油-表面活性剂之间的相互作用。将开发的基于热力学的地球化学模型与最近的岩心驱油数据进行了比较和验证。我们的结果表明,石油表面活性剂SCGR的使用是重要的,应该被捕获以进行详细的表面活性剂吸附。因此,我们观察到,在硬离子存在的情况下,表面活性剂的吸附随着温度的升高而增加,这是由于动能的增加。我们还观察到,硬度的降低降低了表面活性剂的吸附。此外,表面活性剂浓度的增加导致表面活性剂的吸附略有增加,而其在排放物/流出物中的浓度显著增加。因此,硬离子(Ca+2和Mg+2)的浓度具有显著的负面影响,因为它们降低了表面活性剂的溶解度并增加了其吸附。此外,表面活性剂的最低吸附水平是通过注入10倍稀释水(<0.070 mg/g)来实现的。
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来源期刊
CiteScore
6.40
自引率
30.00%
发文量
213
审稿时长
4.5 months
期刊介绍: Specific areas of importance including, but not limited to: Fundamentals of thermodynamics such as energy, entropy and exergy, laws of thermodynamics; Thermoeconomics; Alternative and renewable energy sources; Internal combustion engines; (Geo) thermal energy storage and conversion systems; Fundamental combustion of fuels; Energy resource recovery from biomass and solid wastes; Carbon capture; Land and offshore wells drilling; Production and reservoir engineering;, Economics of energy resource exploitation
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