Experimental Study of Nanofluids Applied in EOR Processes

Dantas, Tereza Neuma de Castro; Souza, Tamyris Thaise Costa de; Neto, Afonso Avelino Dantas; Moura, M. C. P. A.; Neto, Eduardo Lins de Barros

doi:10.1007/s11743-017-1992-2

Cited by 33 publications

(16 citation statements)

References 52 publications

(58 reference statements)

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“…To obtain nanoemulsions, we used the inversion phase method promoted by dilution of a binary mixture composed of surfactant, co-surfactant, and oil [19]. After the first aqueous droplet, the binary mixture become a water-in-oil microemulsion.…”

Section: Acid Nanoemulsion Preparation and Characterizationmentioning

confidence: 99%

“…Nanoemulsions are potential alternatives to microemulsions and can exhibit similar properties at low surfactant concentrations [19][20][21][22][23]. A nanoemulsion is a dispersion of small droplets of two immiscible fluids, typically oil in water (O/W) or water in oil (W/O), with a mean droplet size of < 200 nm [24][25][26], requiring energy input for formation [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

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Investigating the Fluid–Solid Interaction of Acid Nonionic Nanoemulsion with Carbonate Porous Media

et al. 2020

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The subject of rock–fluid interaction is important in cases where flow through porous media is occurring. One special case is when the fluid reacts with the porous matrix. In this case, the mass transfer and reaction rate control the dissolution pattern. This article aimed to study the interaction between an acid nanoemulsion system and a carbonate porous media. Nanoemulsions were developed to retard the rock’s dissolution and to promote the formation of conductivity channels. Nanoemulsions were prepared using ALK100 (alkyl alcohol ethoxylate) and RNX110 (alkylphenol ethoxylate) (nonionic surfactants), sec-butanol (co-surfactant), xylene isomers (oil phase), and a solution of HCl (aqueous phase). The obtained systems were characterized in terms of surface tension, droplet diameter, and reactivity. X-ray fluorescence/diffraction (XRF/XRD) and X-ray microtomography (microCT) were performed on carbonate porous media samples treated with the acid systems in order to observe the effects of the fluid–rock interaction. The results showed that the acid nanoemulsion, presenting a low oil content formulation, showed the low surface tension and droplet size characteristic of nanoemulsions. It was experimentally verified that the reactivity in the nanoemulsion media was mass-transfer-retarded, and that the wormhole pattern was verified under the studied conditions.

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Section: Acid Nanoemulsion Preparation and Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigating the Fluid–Solid Interaction of Acid Nonionic Nanoemulsion with Carbonate Porous Media

et al. 2020

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“…The surfactant acts in reducing the surface tension and contributing to the stability of the emulsion formed. The alkaline agent promotes the emulsification of the trapped oil, changes the wettability of the rock surface, increases pH and reduces adsorption of surfactant and polymer (Sheng, 2011;Castro Dantas et al, 2017;Aiolfi & Romero, 2019).…”

Section: Introductionmentioning

confidence: 99%

Obtaining and characterizing microemulsion systems containing Alkali-Surfactant-Polymer (ASP) for advanced oil recovery application

Alves

Oliveira

Viana

et al. 2021

RSD

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Fluids in terms of rheological behavior can be classified into Newtonians and non-Newtonians. Newtonians are fluids that have unique and absolute viscosities, because the ratio between shear stress and shear rate is constant. In the oil industry, most fluids, such as microemulsions, oil and polymeric solutions, do not exhibit Newtonian behavior. To understand the behavior of chemical fluids, it is necessary to analyze some parameters to interpret their properties and applicability. In this context, the present work aims to obtain and characterize microemulsion systems containing Alkali, Surfactant, and Polymer, and verify their applicability in advanced oil recovery. Thus, we obtained five microemulsion systems consisting of saponified coconut oil (surfactant), Butan-1-ol (co-surfactant), kerosene (oil phase), Na2CO3 (alkali), water and different percentages of the polymer. The systems were characterized by analyzes of particle diameter, surface tension, viscosity and rheological behavior using mathematical models. Droplet sizes showed characteristic values of micellar aggregates. Surface tension presented a slight elevation when the percentage of polymer in the microemulsion increased. Through the rheological study, it was possible to observe that experimental values were better adjusted to the Ostwald-de Waele “power-law” model. As the percentage of polymer in the system increased, we calculated the apparent viscosity of the systems and observed an increasing change in viscosity values, a result of great interest to enhanced oil recovery studies.

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“…Throughout EOR methods, chemical flooding techniques, including polymer flooding, alkaline flooding, and flooding of surfactant systems, have been reported as a promising techniques based on experimental laboratory studies and field work (Liu et al 2004;Benzagouta et al 2013;Castro Dantas et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the effects of acid microemulsion flooding to enhancement of oil recovery in carbonate reservoirs

Dantas

Oliveira

Souza

et al. 2019

J Petrol Explor Prod Technol

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Enhanced oil recovery (EOR) techniques play an essential role in the maintenance of petroleum production worldwide. These techniques are receiving special attention due to the continuous decline in availability of oil resources. The study of surfactants and correlated systems have been considered due to their capacity to alter the wettability and interfacial proprieties, consequently reducing residual oil saturation and increasing oil production. In this context, heterogeneity becomes one of the main challenges to overcome, for it makes the fluid flow preferably thought the highest permeability regions, affecting sweep efficiency. It is also known that acids react with carbonate formations promoting matrix dissolution. However, few works in the literature report the use of reactive fluids in EOR. Therefore, this work analyzes the effects of reactive acid flow on porous carbonate media and its impact on advanced oil recovery operations. It presents an experimental study of the effects of acid microemulsion flooding in the enhancement of oil recovery in carbonate reservoirs. Acid microemulsions studied were characterized by surface tension, droplet diameter, viscosity, and corrosiveness. Flooding experiments demonstrated that the reactive flow of acid microemulsions in porous media increases oil recovery, achieving up to 30% additional recovery of the total oil in place. However, by increasing the reactivity of the systems, severe dissolution of the porous matrix can occur. The results presented open a new path on the use of low reactive fluids in enhanced oil recovery.

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Experimental Study of Nanofluids Applied in EOR Processes

Cited by 33 publications

References 52 publications

Investigating the Fluid–Solid Interaction of Acid Nonionic Nanoemulsion with Carbonate Porous Media

Investigating the Fluid–Solid Interaction of Acid Nonionic Nanoemulsion with Carbonate Porous Media

Obtaining and characterizing microemulsion systems containing Alkali-Surfactant-Polymer (ASP) for advanced oil recovery application

Experimental study of the effects of acid microemulsion flooding to enhancement of oil recovery in carbonate reservoirs

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