An experimental study of the combination of smart water and silica nanoparticles to improve the recovery of asphaltenic oil from carbonate reservoirs

Rayeni, Nima Sharifi; Imanivarnosfaderani, Mohammadreza; Rezaei, Amin; Gomari, Sina Rezaei

doi:10.1016/j.petrol.2021.109445

Cited by 16 publications

(4 citation statements)

References 29 publications

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“…The main mechanisms associated with this hybrid method were: wettability alteration, reduction of nanoparticle adsorption, formation of microemulsions and IFT reduction, in addition to an increase in viscosity of the injected fluid. The introduction of smart water and silica nanoparticles has also been found useful to improve the recovery of asphaltenic oil from carbonate reservoirs [ 40 ]. In these reservoirs, due to the high percentage of asphaltenes, flow problems caused by the formation of stable emulsions are frequent.…”

Section: Reviewmentioning

confidence: 99%

Nanoparticles in Chemical EOR: A Review on Flooding Tests

2022

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The use of nanofluids is showing promise as an enhanced oil recovery (EOR) method. Several reviews have been published focusing on the main mechanisms involved in the process. This new study, unlike previous works, aims to collect information about the most promising nano-EOR methods according to their performance in core-flooding tests. As its main contribution, it presents useful information for researchers interested in experimental application of nano-EOR methods. Additional recoveries (after brine flooding) up to 15% of the original oil in place, or higher when combined with smart water or magnetic fields, have been found with formulations consisting of simple nanoparticles in water or brine. The functionalization of nanoparticles and their combination with surfactants and/or polymers take advantage of the synergy of different EOR methods and can lead to higher additional recoveries. The cost, difficulty of preparation, and stability of the formulations have to be considered in practical applications. Additional oil recoveries shown in the reviewed papers encourage the application of the method at larger scales, but experimental limitations could be offering misleading results. More rigorous and systematic works are required to draw reliable conclusions regarding the best type and size of nanoparticles according to the application (type of rock, permeability, formation brine, reservoir conditions, other chemicals in the formulation, etc.)

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Section: Reviewmentioning

confidence: 99%

Nanoparticles in Chemical EOR: A Review on Flooding Tests

2022

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“…Tavakkoli et al, , in addition to the indirect method development, observed that the effect of emulsified water on asphaltene instability (both asphaltene precipitation onset and asphaltene precipitation amount) differs from one crude oil sample to another. In 2022, Rayeni et al conducted a water injection study and observed that the asphaltene content of the core effluent decreased sharply (up to 27.5% in comparison to the original oil asphaltene content), which is an indicator of asphaltene precipitation/deposition.…”

Section: Introductionmentioning

confidence: 99%

“…They observed that the asphaltene affinity to the water−oil interface decreases significantly in the presence of THF. Furthermore, Rayeni et al 28 introduced 500 ppm SiO 2 nanoparticles (SNP) to the injected water. The results of SARA analysis on core effluent confirmed the effectiveness of SNP to hinder asphaltene precipitation and deposition.…”

Section: Introductionmentioning

confidence: 99%

Ionic Liquid Application To Prevent Asphaltene Precipitation and Deposition during Water-Based EOR Techniques

Mohammadi,

Soulgani,

Jamialahmadi

et al. 2023

Energy Fuels

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In this study, systematic experiments were designed to investigate the effect of water/saline water and ionic liquid additives on asphaltene instability. The results revealed that emulsified water can lead to asphaltene precipitation up to 75.81% of the asphaltene content in the synthetic oil. The FTIR analysis illustrated that the heteroatoms in the asphaltene structure control the asphaltene precipitation at the water−oil interface. It was observed that the salinity has a dual effect on asphaltene instability so that asphaltene precipitation increases with an increase in salinity up to 20,000 ppm, whereas it decreases with a further increase in salinity. The "salting-in" and "salting-out" effects were used to describe this observation. By comparing the effects of four different salts (NaCl, Na 2 SO 4 , MgCl 2 , and MgSO 4 ), it was found that Mg 2+ intensifies the asphaltene instability rather than Na + , while the presence of SO 4 2− hinders asphaltene precipitation in comparison to Cl − . The Hofmeister series was proposed for the first time to justify the effect of anions and cations on asphaltene instability in the presence of water. Moreover, the performance of three synthesized ionic liquids (TBAST, TBAOL, and TBACiN) to prevent asphaltene instability was investigated. The results revealed that the ionic liquids act through two mechanisms: (i) by replacing asphaltene absorbed on the water−oil interface and (ii) by transferring to the oleic phase and dispersing asphaltene molecules. The better performance of TBAST in reducing asphaltene precipitation by up to 72.7% demonstrated the key role of alkyl length in the structure of ionic liquids. Finally, the dynamic test results indicated that adding 1348 ppm TBAST to the injected saline water reduces asphaltene precipitation/deposition by 83.7% and enhances the ultimate recovery factor from 49.73 to 71.35%.

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“…In other research studies, the effects of other reservoir parameters including temperature and salinity were considered. − Bila et al found that temperature and salinity have a low influence on the performance of the nanomaterials when they applied polymer-coated silica NPs . In addition, the effects of the size of silica NPs and silica–xanthan NCs were studied by Ragab et al They concluded that the smaller NPs have a higher impact on increasing the oil recovery compared with NPs with a larger size .…”

Section: Introductionmentioning

confidence: 99%

Insight into Nano-chemical Enhanced Oil Recovery from Carbonate Reservoirs Using Environmentally Friendly Nanomaterials

et al. 2022

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The use of nanoparticles (NPs) in enhanced oil recovery (EOR) processes is very effective in reducing the interfacial tension (IFT) and surface tension (ST) and altering the wettability of reservoir rocks. The main purpose of this study was to use the newly synthesized nanocomposites (KCl/SiO2/Xanthan NCs) in EOR applications. Several analytical techniques including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscope (SEM) were applied to confirm the validity of the synthesized NCs. From the synthesized NCs, nanofluids were prepared at different concentrations of 100–2000 ppm and characterized using electrical conductivity, IFT, and ST measurements. From the obtained results, it can be observed that 1000 ppm is the optimal concentration of the synthesized NCs that had the best performance in EOR applications. The nanofluid with 1000 ppm KCl/SiO2/Xanthan NCs enabled reducing the IFT and ST from 33 and 70 to 29 and 40 mN/m, respectively. However, the contact angle was highly decreased under the influence of the same nanofluid to 41° and the oil recovery improved by an extra 17.05% OOIP. To sum up, KCl/SiO2/Xanthan NCs proved highly effective in altering the wettability of rocks from oil-wet to water-wet and increasing the cumulative oil production.

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An experimental study of the combination of smart water and silica nanoparticles to improve the recovery of asphaltenic oil from carbonate reservoirs

Cited by 16 publications

References 29 publications

Nanoparticles in Chemical EOR: A Review on Flooding Tests

Nanoparticles in Chemical EOR: A Review on Flooding Tests

Ionic Liquid Application To Prevent Asphaltene Precipitation and Deposition during Water-Based EOR Techniques

Insight into Nano-chemical Enhanced Oil Recovery from Carbonate Reservoirs Using Environmentally Friendly Nanomaterials

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