Applying Fractional-Flow Theory Under the Loss of Miscibility

Ghanbarnezhad-Moghanloo, R.; Lake, Larry W.

doi:10.2118/129966-pa

Cited by 10 publications

(3 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The theory of fractional flow reveals the basic law of non-piston displacement for two-phase flow, based on some indispensable and reasonable assumptions. The theory is generalized, starting with the Buckley-Leverett theory for water flooding and has been applied to various EOR methods, such as gas flooding and polymer flooding (Buckley and Leverett, 1942; Ehlig-Economides and Economides, 2010; Ghanbarnezhad and Lake, 2012; Hirasaki, 1981; Johansen et al., 2016; Pope, 1980). The theory involves one-dimensional flow of two incompressible fluids in porous media.…”

Section: Introductionmentioning

confidence: 99%

Analytical solution of Buckley-Leverett equation for gas flooding including the effect of miscibility with constant-pressure boundary

Chen

et al. 2019

Energy Exploration & Exploitation

View full text Add to dashboard Cite

This paper presents an analytical solution of Buckley-Leverett equation for gas flooding with constant-pressure boundary including the effect of miscibility on the viscosity and relative permeability. First, a relative permeability model and a viscosity model with consideration of miscibility are used to describe the variations of relative permeability and viscosity of oil and gas. Then, based on the fractional-flow theory, the Buckley-Leverett equation for gas flooding with constantpressure boundary including the effect of miscibility is constructed and solved analytically. From the analytical solution, the saturation and pressure profiles, the total volumetric flux and the breakthrough time are determined. To verify the theory, the analytical solution is compared with the numerical solution. The comparison shows that the analytical solution is in reasonable agreement with numerical solution. Through the study on the influential factors, it can be concluded that total volumetric flux is increasing with the increases of permeability and pressure and decrease of gas viscosity. The increase of total volumetric flux accelerates breakthrough of the injected gas. Furthermore, with the pressure increase, there are remarkable reduction in residual oil saturation and improvement of relative permeability, resulting in higher gas saturation and oil displacement efficiency. The analytical solution presented in this paper provides guidance on analyzing the distribution of saturation and pressure profiles, predicting the gas production and oil recovery efficiency of oil well.

show abstract

Section: Introductionmentioning

confidence: 99%

Analytical solution of Buckley-Leverett equation for gas flooding including the effect of miscibility with constant-pressure boundary

Chen

et al. 2019

Energy Exploration & Exploitation

View full text Add to dashboard Cite

show abstract

“…The model includes calculations procedure for the following:  The residual oil saturation at the end of the miscible flooding -This subroutine resembles the effects of the loss of miscibility and dispersion on the residual oil saturation remaining at the end of miscible flooding. The curves of Moghanloo (Ghanbarnezhad-Moghanloo and Lake, 2012;Moghanloo, 2012) are used for this purpose…”

Section: Model Algorithmmentioning

confidence: 99%

An analytical model for performance prediction of miscible flooding methods

Elkhatib¹,

Ela

El-Banbi³

et al. 2022

JER is an international, peer-reviewed journal that publishes f

View full text Add to dashboard Cite

The main target of this study is to develop fast and efficient analytical model that can predict reservoir performance under the implementation of miscible flooding processes. The developed model uses upgraded fractional flow theories and several areal sweep efficiency models. Unlike previous attempts in this topic, the developed model accounts for reservoir instability factors such as reservoir heterogeneity, viscous fingering behavior and gravity segregation. In addition, it accounts for different Enhanced Oil Recovery (EOR) injection strategies including continuous solvent injection and simultaneous Water Alternate Gas (WAG) injection in both secondary and tertiary miscible displacement modes. Moreover, the model has been extended to account for different injection patterns including line drive and 5-spot. The model was validated against two actual field applications: (1) the WAG injection pilot project of Slaughter field, and (2) the miscible flooding pilot project of Garber field. The results of the model deviate from the results of the field measurements with a range of 7.3 to 20.4%. This match demonstrated the ability and the strength of the developed model. The model utilizes a limited set of input data that is available in the field at the early stages of the reservoir life. Therefore, it can be used as a pre-simulation tool to support the decision-making during the critical technology selection phase.

show abstract

“…The theory of fractional flow has been started with BL for water injection. Then this theory has been applied for different EOR methods like polymer flooding and gas flooding [30][31][32][33][34][35]. BL equation is known as an analytical solution for displacement front in two-phase flow.…”

Section: Introductionmentioning

confidence: 99%

Modification of interfacial tension by considering the effect of porous medium during near miscible gas injection

Mehrjoo,

Kazemzadeh,

Safaei

et al. 2024

Scientia Iranica

View full text Add to dashboard Cite

Gas injection as one of the interesting enhance oil recovery (EOR) methods has been attracted many attentions, hence, numerous experimental and simulation studies of this process were investigated by several researchers. However, an investigation of some parameters such as the effect of injection gas, the effect interfacial tension (IFT) at minimum miscible pressure (MMP), named IFT0 in the present study, the impact of porous medium on the IFT and subsequently on the gas injection process is still missing. Hence, in this paper, the effect of injection gases, IFT0, and the influence of porous media on the IFT and then on the fractional flow of gas, saturation curve of gas, and relative permeability of oil and gas were investigated. Depending on the type of injection gases used, our findings indicate that different MMPs can be achieved. Additionally, the type of injection gases affects fractional flow, saturation, and relative permeability curves. Our investigation illustrated that the impact of IFT0 aforementioned curves is depended on the miscible and immiscible conditions. The effect of porous medium and fracture on the IFT of system have observed, while modified IFT did not affect fractional flow, saturation, and relative permeability curves.

show abstract

Applying Fractional-Flow Theory Under the Loss of Miscibility

Cited by 10 publications

References 31 publications

Analytical solution of Buckley-Leverett equation for gas flooding including the effect of miscibility with constant-pressure boundary

Analytical solution of Buckley-Leverett equation for gas flooding including the effect of miscibility with constant-pressure boundary

An analytical model for performance prediction of miscible flooding methods

Modification of interfacial tension by considering the effect of porous medium during near miscible gas injection

Contact Info

Product

Resources

About