Effect of alumina and silica nanocomposite based on polyacrylamide on light and heavy oil recovery in presence of formation water using micromodel

IF 4.2 Q2 ENERGY & FUELS
Ashkan Maleki , Behnam Sedaee , Alireza Bahramian , Sajjad Gharechelou , Nahid Sarlak , Arash Mehdizad , Mohammad reza Rasaei , Aliakbar Dehghan
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引用次数: 0

Abstract

Increasing world request for energy has made oil extraction from reservoirs more desirable. Many novel EOR methods have been proposed and utilized for this purpose. Using nanocomposites in chemical flooding is one of these novel methods. In this study, we investigated the impact of six injection solutions on the recovery of light and heavy oil with the presence of two different brines as formation water using a homogenous glass micromodel. All of the injection solutions were based on a 40,000 ppm NaCl synthetic seawater (SSW), one of which was additive free and the others were prepared by dispersing nanocomposite silica-based polyacrylamide (NCSP), nanocomposite alumina-based polyacrylamide (NCAP), the combination of both nanocomposites silica and alumina based on polyacrylamide (NCSAP), surfactant (CTAB) and polyacrylamide (PAM) with a concentration of 1000 ppm as additives. The Stability of nanocomposites was tested against the salinity of the brine and temperature using salinity and DSC tests which were successful. Alongside stability tests, IFT, contact angle and oil recovery measurements were made. Visual results revealed that in addition to the effect of silica and alumina nanocomposite in reducing interfacial tension and wettability alteration, control of mobility ratio caused a major improvement in sweeping efficiency and oil recovery. According to the sweeping behavior of injected fluids, it was found that the main effect of surfactant was wettability alteration, for polyacrylamide was mobility control and for nanocomposites was the reduction of interfacial tension between oil and injected fluid, which was completely analyzed and checked out. Also, NCSAP with 95.83% and 70.33% and CTAB with 84.35% and 91% have the highest light oil recoveries at 250,000 ppm and 180,000 ppm salinity, respectively which is related to the superposition effect of interactions between nanocomposites, solution and oil. Based on our results it can be concluded that the most effective mechanism in oil recovery was IFT reduction which was done by CTAB reduction also by using a polymer-based nanocomposite such as NCSAP and adding the mobility control factor, the oil recovery can be further enhanced. In the case of heavy oil recovery, it can be concluded that the mobility control played a much more effective role when the PAM performed almost similarly to the CTAB and other nanocomposites with a recovery factor of around 17%. In this study, we tried to investigate the effect of different injection solutions and their related mechanisms on oil recovery.

基于聚丙烯酰胺的氧化铝和二氧化硅纳米复合材料对地层水存在下轻油和重油采收率的影响(使用微模型
全球对能源的需求日益增长,使得从储油层中开采石油变得更为迫切。为此,人们提出并使用了许多新型的 EOR 方法。在化学淹没中使用纳米复合材料就是这些新型方法之一。在本研究中,我们使用均质玻璃微模型研究了六种注入溶液对轻油和重油采收率的影响,其中存在两种不同的盐水作为地层水。所有注入液都基于 40,000 ppm 的氯化钠合成海水(SSW),其中一种不含添加剂,其他注入液则是通过分散纳米复合硅基聚丙烯酰胺(NCSP)制备的、以氧化铝为基础的纳米复合聚丙烯酰胺(NCAP)、以聚丙烯酰胺为基础的二氧化硅和氧化铝两种纳米复合材料的组合(NCSAP)、表面活性剂(CTAB)和聚丙烯酰胺(PAM)(添加剂浓度为 1000 ppm)。利用盐度和 DSC 试验,成功地测试了纳米复合材料在盐水和温度条件下的稳定性。除稳定性测试外,还进行了 IFT、接触角和油回收率测量。直观结果表明,除了二氧化硅和氧化铝纳米复合材料在降低界面张力和改变润湿性方面的作用外,控制流动比也大大提高了清扫效率和采油率。根据注入流体的清扫行为发现,表面活性剂的主要作用是改变润湿性,聚丙烯酰胺的主要作用是控制流动性,而纳米复合材料的主要作用是降低油与注入流体之间的界面张力,这一点得到了完整的分析和验证。此外,NCSAP(95.83% 和 70.33%)和 CTAB(84.35% 和 91%)在盐度分别为 250,000 ppm 和 180,000 ppm 时具有最高的轻油采收率,这与纳米复合材料、溶液和油之间相互作用的叠加效应有关。根据我们的研究结果,可以得出结论:最有效的采油机制是通过 CTAB 减少 IFT,而使用聚合物基纳米复合材料(如 NCSAP)并添加流动性控制因子,可以进一步提高采油率。就重油回收而言,当 PAM 与 CTAB 和其他纳米复合材料的性能几乎相似,回收率约为 17% 时,可以得出结论:流动性控制发挥了更有效的作用。在这项研究中,我们试图研究不同注入溶液及其相关机制对采油的影响。
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来源期刊
Petroleum
Petroleum Earth and Planetary Sciences-Geology
CiteScore
9.20
自引率
0.00%
发文量
76
审稿时长
124 days
期刊介绍: Examples of appropriate topical areas that will be considered include the following: 1.comprehensive research on oil and gas reservoir (reservoir geology): -geological basis of oil and gas reservoirs -reservoir geochemistry -reservoir formation mechanism -reservoir identification methods and techniques 2.kinetics of oil and gas basins and analyses of potential oil and gas resources: -fine description factors of hydrocarbon accumulation -mechanism analysis on recovery and dynamic accumulation process -relationship between accumulation factors and the accumulation process -analysis of oil and gas potential resource 3.theories and methods for complex reservoir geophysical prospecting: -geophysical basis of deep geologic structures and background of hydrocarbon occurrence -geophysical prediction of deep and complex reservoirs -physical test analyses and numerical simulations of reservoir rocks -anisotropic medium seismic imaging theory and new technology for multiwave seismic exploration -o theories and methods for reservoir fluid geophysical identification and prediction 4.theories, methods, technology, and design for complex reservoir development: -reservoir percolation theory and application technology -field development theories and methods -theory and technology for enhancing recovery efficiency 5.working liquid for oil and gas wells and reservoir protection technology: -working chemicals and mechanics for oil and gas wells -reservoir protection technology 6.new techniques and technologies for oil and gas drilling and production: -under-balanced drilling/gas drilling -special-track well drilling -cementing and completion of oil and gas wells -engineering safety applications for oil and gas wells -new technology of fracture acidizing
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