Experiments and numerical simulations of chemical enhanced oil recovery in fractured carbonate rocks

Mejia, Miguel; Parra, José Ernesto; Mejía, Lucas; Pope, Gary A.; Balhoff, Matthew T.

doi:10.1016/j.petrol.2020.108280

Cited by 17 publications

(8 citation statements)

References 30 publications

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“…In order to estimate the fracture aperture, which is used to compute the fracture permeability, eq is used. Equation is a slit analogue of the Hagen-Poiseuille equation and Darcy’s law and has been demonstrated to be a good estimation of the fracture aperture when the matrix permeability is low b = true( 12 A k normale d true) 1 / 3 where b is the fracture aperture, A is the cross-sectional area of the core, k e is the effective permeability of the matrix with the fracture, and d is the diameter of the core .…”

Section: Materials and Methodsmentioning

confidence: 99%

“…Equation is a slit analogue of the Hagen-Poiseuille equation and Darcy’s law and has been demonstrated to be a good estimation of the fracture aperture when the matrix permeability is low b = true( 12 A k normale d true) 1 / 3 where b is the fracture aperture, A is the cross-sectional area of the core, k e is the effective permeability of the matrix with the fracture, and d is the diameter of the core . The fracture apertures evaluated for the CS and CZ cores employing eq are 0.023 and 0.022 mm, respectively.…”

Section: Materials and Methodsmentioning

confidence: 99%

“…The fracture apertures evaluated for the CS and CZ cores employing eq are 0.023 and 0.022 mm, respectively. Furthermore, Darcy’s law across parallel and continuous layers is used to compute the fracture permeabilities as shown in eq . k normalf = A k normale − A normalm k normalm A normalf where k f is the fracture permeability, A f is the fracture area perpendicular to the flow, k m is the permeability of the rock matrix, and A m is the matrix area perpendicular to the flow . The computation from eq yielded fracture permeabilities of approximately 9,800 md and 9,466 md for CS and CZ cores, respectively.…”

Section: Materials and Methodsmentioning

confidence: 99%

“…Equation 1 is a slit analogue of the Hagen-Poiseuille equation and Darcy's law and has been demonstrated to be a good estimation of the fracture aperture when the matrix permeability is low. 56 (1…”

Section: Absolute Permeability and Effective Porositymentioning

confidence: 99%

“…where b is the fracture aperture, A is the cross-sectional area of the core, k e is the effective permeability of the matrix with the fracture, and d is the diameter of the core. 56 The fracture apertures evaluated for the CS and CZ cores employing eq 1 are 0.023 and 0.022 mm, respectively. Furthermore, Darcy's law across parallel and continuous layers is used to compute the fracture permeabilities as shown in eq 2.…”

Section: Absolute Permeability and Effective Porositymentioning

confidence: 99%

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Experimental Study on Alternating Injection of Silica and Zirconia Nanoparticles with Low Salinity Water and Surfactant into Fractured Carbonate Reservoirs for Enhanced Oil Recovery

Dordzie

Dejam

2022

Ind. Eng. Chem. Res.

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Recently, the application of low salinity water (LSW), nanoparticles (NPs), and surfactants (collectively abbreviated as LNS) in carbonate formations for enhanced oil recovery (EOR) purposes has been under investigation, but relatively few studies have been performed for their implementation in fractured carbonate reservoirs (FCRs). The objective of this study is to apply the recently proposed method of alternatively injecting LNS in cycles into FCRs using silica and zirconia NPs. The cumulative oil recovered from the two coreflooding experiments performed at 3000 psi overburden pressure and 70 °C temperature is reported in this study in addition to spontaneous imbibition (SI) experiments. The experimental design is structured to depict the best industrial practice for the injected fluids in FCRs. Furthermore, this work investigates the effect of zirconia NPs on the interfacial tension (IFT) between the injected fluids and crude oil under the previously stated experimental conditions. The outcome of these experiments divulges that the alternating injection of LNS employing silica and zirconia NPs is effective and well suited for EOR applications in FCRs owing to a cumulative oil recovery of approximately 8 and 7% of the original oil in place (OOIP), respectively. This study validates the implementation of the recently proposed alternating injection of the LNS technique for FCRs and shows its performance utilizing newly acquired zirconia NPs, which is relevant for industrial application at a large scale.

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