Simulation study of wettability alteration enhanced oil recovery during co-current spontaneous imbibition

Andersen, Pål Østebø; Ahmed, Sameer

doi:10.1016/j.petrol.2020.107954

Cited by 14 publications

(10 citation statements)

References 49 publications

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“…The reasoning behind this observation is already discussed. 13,14 According to these studies, two terms of advection and capillary diffusion are competing inside the porous medium. At early times (till the front reaches the effluent), both capillary and advection terms contribute to front displacement within the rock.…”

Section: Model Validation With Experimental Resultsmentioning

confidence: 99%

“…The time when the front reaches effluent is determined as critical time. 13,14 After this time, the solution changes to the Buckley−Leverett profile as the injected fluid displaces continuously inside the medium and displaces at the effluent. The following equation can calculate this critical time…”

Section: Model Validation With Experimental Resultsmentioning

confidence: 99%

“…The time when the front reaches effluent is determined as critical time. , After this time, the solution changes to the Buckley–Leverett profile as the injected fluid displaces continuously inside the medium and displaces at the effluent. The following equation can calculate this critical time However, there are some studies in the literature showing that at some critical rates (depending on the rock type, fluid viscosity, and wettability characteristics), relative permeability curves may not be obtained .…”

Section: Model Verification and Interpretation Of Resultsmentioning

confidence: 99%

“…On the other hand, the viscous flow of two different phases in porous media is also of interest for soil and groundwater contamination studies, as organic contaminant material penetrates lower soil layers as a solute of nonwetting agents (like gasoline or chlorinated solvents). This is still an active area of research, and many scholars proposed numerical and semianalytical solutions for co-current spontaneous imbibition. − …”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Analytical Exact Solution for Co-Current Spontaneous Imbibition in Porous Media Considering Early- and Late-Time Effects

et al. 2021

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Spontaneous imbibition (SI) of the wetting phase through the porous medium to displace the nonwetting phase is determined by capillary diffusion and injection fluid advection. This system is described using a transport equation of involved mechanisms and a pressure equation. The Buckley−Leverett solution is a particular case when capillary pressure is negligible. There are also analytical solutions available for cases with capillary diffusion as the dominant involved mechanism. In this study, a new mathematical model is developed to consider how both effects are significant. The model proposes an exact valid solution for both early-time (until the saturation front reaches effluent) and late-time imbibition. The accuracy of the model has been validated by comparing the suggested analytical model with numerical and experimental data. One of the advantages of the developed model is that despite the previous models, the injection rate does not need to be proportional to the square root of time, and other functional forms can be applied. Furthermore, the suggested analytical scheme is valid for strongly water-wet (SWW), weakly water-wet (WWW), and mixed-wet (MW) rock surfaces.

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Section: Model Validation With Experimental Resultsmentioning

confidence: 99%

Section: Model Validation With Experimental Resultsmentioning

confidence: 99%

Section: Model Verification and Interpretation Of Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analytical Exact Solution for Co-Current Spontaneous Imbibition in Porous Media Considering Early- and Late-Time Effects

et al. 2021

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“…This process is referred as spontaneous imbibition and can recover as much oil or gas at matrix level as by forced imbibition if the matrix is strongly water-wet, but less under other wetting conditions (Zhou et al 2000). Imbibition of fluids carrying wettability alternating chemicals can further improve recovery (Zhang et al 2006;Mamonov et al 2019;Andersen and Ahmed 2021). Spontaneous imbibition can occur counter-currently, where the wetting and non-wetting fluids flow in opposite direction.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Counter-Current Spontaneous Imbibition Based on Momentum Equations with Viscous Coupling, Brinkman Terms and Compressible Fluids

2021

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A numerical model is investigated representing counter-current spontaneous imbibition of water to displace oil or gas from a core plug. The model is based on mass and momentum conservation equations in the framework of the theory of mixtures. We extend a previous imbibition model that included fluid–rock friction and fluid–fluid drag interaction (viscous coupling) by including fluid compressibility and Brinkman viscous terms. Gas compressibility accelerated recovery due to gas expansion from high initial non-wetting pressure to ambient pressure at typical lab conditions. Gas compressibility gave a recovery profile with two characteristic linear sections against square root of time which could match tight rock literature experiments. Brinkman terms decelerated recovery and delayed onset of imbibition. Experiments where this was prominent were successfully matched. Both compressibility and Brinkman terms caused recovery deviation from classical linearity with the square root of time. Scaling yielded dimensionless numbers when Brinkman term effects were significant.Article Highlights Spontaneous imbibition with viscous coupling, compressibility and Brinkman terms. Viscous coupling reduces spontaneous imbibition rate by fluid–fluid friction. Brinkman terms delay early recovery and explain seen delayed onset of imbibition. Gas compressibility accelerates recovery and can be significant at lab conditions. Gas compressibility gives recovery with two root of time lines as seen for shale.

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Influence of Clay and Diffusion Phenomenon on Imbibition of Ultra-low Permeability Rock

Zhang

Wang

An³

et al. 2023

Springer Series in Geomechanics and Geoengineering

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Simulation study of wettability alteration enhanced oil recovery during co-current spontaneous imbibition

Cited by 14 publications

References 49 publications

Analytical Exact Solution for Co-Current Spontaneous Imbibition in Porous Media Considering Early- and Late-Time Effects

Analytical Exact Solution for Co-Current Spontaneous Imbibition in Porous Media Considering Early- and Late-Time Effects

Simulation of Counter-Current Spontaneous Imbibition Based on Momentum Equations with Viscous Coupling, Brinkman Terms and Compressible Fluids

Influence of Clay and Diffusion Phenomenon on Imbibition of Ultra-low Permeability Rock

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