Buitrago-Rincon Dayan L, Sadtler Véronique, Mercado Ronald A, Roques-Carmes Thibault, Marchal Philippe, Muñoz-Navarro Samuel F, Sandoval María, Pedraza-Avella Julio A, Lemaitre Cécile
Grupo de Investigación en Fenómenos Interfaciales, Reología y Simulación de Transporte (FIRST), Universidad Industrial de Santander, Bucaramanga 680002, Colombia.
Laboratoire Réactions et Génie des Procédés, Université de Lorraine, CNRS, F-54000 Nancy, France.
Nanomaterials (Basel). 2023 Mar 2;13(5):925. doi: 10.3390/nano13050925.
Polymer flooding is one of the enhanced oil recovery (EOR) methods that increase the macroscopic efficiency of the flooding process and enhanced crude oil recovery. In this study, the effect of silica nanoparticles (NP-SiO) in xanthan gum (XG) solutions was investigated through the analysis of efficiency in core flooding tests. First, the viscosity profiles of two polymer solutions, XG biopolymer and synthetic hydrolyzed polyacrylamide (HPAM) polymer, were characterized individually through rheological measurements, with and without salt (NaCl). Both polymer solutions were found suitable for oil recovery at limited temperatures and salinities. Then, nanofluids composed of XG and dispersed NP-SiO were studied through rheological tests. The addition of nanoparticles was shown to produce a slight effect on the viscosity of the fluids, which was more remarkable over time. Interfacial tension tests were measured in water-mineral oil systems, without finding an effect on the interfacial properties with the addition of polymer or nanoparticles in the aqueous phase. Finally, three core flooding experiments were conducted using sandstone core plugs and mineral oil. The polymers solutions (XG and HPAM) with 3% NaCl recovered 6.6% and 7.5% of the residual oil from the core, respectively. In contrast, the nanofluid formulation recovered about 13% of the residual oil, which was almost double that of the original XG solution. The nanofluid was therefore more effective at boosting oil recovery in the sandstone core.
聚合物驱油是提高采收率（EOR）的方法之一，可提高驱油过程的宏观效率并提高原油采收率。在本研究中，通过岩心驱替试验的效率分析，研究了二氧化硅纳米颗粒（NP-SiO）在黄原胶（XG）溶液中的作用。首先，通过流变学测量分别表征了两种聚合物溶液（XG生物聚合物和合成水解聚丙烯酰胺（HPAM）聚合物）在有无盐（NaCl）情况下的粘度曲线。发现这两种聚合物溶液在有限的温度和盐度下都适合用于原油采收。然后，通过流变学测试研究了由XG和分散的NP-SiO组成的纳米流体。结果表明，添加纳米颗粒对流体粘度有轻微影响，且随着时间的推移这种影响更为显著。在水-矿物油体系中进行了界面张力测试，结果发现向水相中添加聚合物或纳米颗粒对界面性质没有影响。最后，使用砂岩岩心塞和矿物油进行了三次岩心驱替实验。含3% NaCl的聚合物溶液（XG和HPAM）分别从岩心中采出了6.6%和7.5%的残余油。相比之下，纳米流体配方采出了约13%的残余油，几乎是原始XG溶液的两倍。因此，纳米流体在提高砂岩岩心的原油采收率方面更有效。
