An analytical model for relative permeability in water-wet nanoporous media

Zhang, Tao; Li, Xiangfang; Sun, Zheng; Feng, Dong; Miao, Yuqing; Li, Peihuan; Zhang, ZH

doi:10.1016/j.ces.2017.08.023

Cited by 122 publications

(61 citation statements)

References 54 publications

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“…In fact, relative permeability models for gas–water transport through porous media have been extensively developed or modified by other published works . However, most of them are derived on the basis of the principal assumption that the porous media are composed of circular capillaries.…”

Section: Resultsmentioning

confidence: 99%

Effect of water saturation on gas slippage in circular and angular pores

Chen

et al. 2018

AIChE Journal

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A unified model for gas slip flow through circular and angular pores in both single phase flow and two-phase flow conditions is developed, and the effect of water saturation on gas slippage factors in different pore shapes are revealed. For circular pores, the water saturation retains as thin film binding on pore surfaces without changing the shape of the cross section, and the hydraulic diameters continuously reduce as water saturation increases, directly leading to an increase in the slippage factor. However, for angular pores, the water saturation retains as both films at boundaries and condensations at corners, and the film-water and corner-water gradually change their cross-section shape (from sharp corners to round corners), which further affects the gas slip behavior. Due to the presence of round corners, the ratio of the cross-sectional area and perimeter, which can also be regarded as the reciprocal of a specific surface area, can even increase at a low water saturation condition. Thus the collisions between gas molecules and pore boundaries weaken, resulting in a slight reduction in the gas slippage factor. This interesting finding in the angular pore case directly explains the contradiction of the published experimental results with the general knowledge (i.e., the gas slip factor always increases as water saturation increases). Thus, the validity of the common assumption regarding actual porous media as capillaries with a circular cross-section must be considered more carefully.

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Section: Resultsmentioning

confidence: 99%

Effect of water saturation on gas slippage in circular and angular pores

Chen

et al. 2018

AIChE Journal

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“…region is di erent from that of bulk region. e critical thickness of the interface region can be reasonably determined as 0.7 nm from results of MDS and theoretical studies [50,53]. Based on the results from experiments and MD, Wu et al [1] proposed the relationship between the viscosity of the interface and bulk region, that is a function of the contact angle, and the relationship can be expressed as where is water viscosity of interface region, 0 is contact angle of water droplet on the pore wall.…”

Section: Boundary Slip Lengthmentioning

confidence: 99%

“…en, the area of interface region can be calculated by the thickness of interface region which can be determined reasonably on the basics of MDS or theoretical studies. e results show that the thickness of interface region ranges from 0.7 to 1 nm [50][51][52]. erefore, it is necessary to adopt the e ective viscosity based on the water viscosity and thickness of interface region when calculating the enhancement factor.…”

Section: Introductionmentioning

confidence: 99%

A New Slip Length Model for Enhanced Water Flow Coupling Molecular Interaction, Pore Dimension, Wall Roughness, and Temperature

Wang

et al. 2019

Advances in Polymer Technology

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In this paper, a slip length model is proposed to analyze the enhanced flow based on the Hagen–Poiseuille equation. The model considers the multimechanisms including wall-water molecular interactions, pore dimensions, fractal roughness, and temperature. The increasing wall-water interactions result in the greater slip length and flow enhancement factor. The increased temperature enhances the kinetic energy of water molecules that leads to great surface diffusion coefficient and small work of adhesion. The wall roughness can decrease the slip length and flow enhancement factor in hydrophilic nanopores. This work studies the effects of multimechanisms on slip length and flow enhancement factor theoretically, which can accurately describe the liquid flow in nanopores.

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“…Thermal method has been widely adopted in practical engineering application (Sheikholeslami et al 2017a(Sheikholeslami et al , b, c, d, e, f, g, h, 2018a. At present, the development of unconventional resources has become a hotspot (Yin et al 2017(Yin et al , 2018Zhang et al 2017aZhang et al , b, 2018aFeng et al 2018a, b, c;Hu et al 2018a, b, c;Shi et al 2014Shi et al , 2015aShi et al , b, 2018. For the heavy oil industry, thermal fluid injection has been widely adopted (Sun et al 2017a, b, c;Gao 2018;Huang et al 2018a, b;Calder et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Effect of physical heating on productivity of cyclic superheated steam stimulation wells

Sun

Yao

et al. 2018

J Petrol Explor Prod Technol

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Previous works have focused on the single factor analysis of the effects of chemical reactions of superheated steam with oil and rock minerals on the oil well productivity. However, the relationship between the factors and the contributions to productivity is still unknown. In this paper, the contribution of physical heating of superheated steam to well productivity is studied with the numerical method. Results show that: (a) the heat in the area has a very limited increase when the temperature of superheated steam continues to increase. (b) At the starting stage, the oil is heated to a higher temperature and the mobility is increased. The elastic energy becomes the dominant factor controlling the productivity of the oil well in the following stage. (c) The chemical reactions of superheated steam with oil and rock minerals are the dominant factors contributing to the productivity.

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An analytical model for relative permeability in water-wet nanoporous media

Cited by 122 publications

References 54 publications

Effect of water saturation on gas slippage in circular and angular pores

Effect of water saturation on gas slippage in circular and angular pores

A New Slip Length Model for Enhanced Water Flow Coupling Molecular Interaction, Pore Dimension, Wall Roughness, and Temperature

Effect of physical heating on productivity of cyclic superheated steam stimulation wells

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