Liquid permeability of organic nanopores in shale: Calculation and analysis

Cui, Jinhui; Sang, Qian; Li, Yajun; Yin, Chuancun; Li, Yanchao; Dong, Mingzhe

doi:10.1016/j.fuel.2017.04.057

Cited by 74 publications

(47 citation statements)

References 76 publications

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“…Based on the no-slip HP equation, the water velocity considering boundary slip and changing viscosity of interface region can be expressed as [46,48] where is velocity considering boundary slip, is e ective viscosity of water considering the changing viscosity of water, that can be calculated by water viscosity and area of bulk and interface region, is the slip velocity at the pore wall. e water molecules are strongly a ected by the interactions from walls.…”

Section: Boundary Slip Lengthmentioning

confidence: 99%

“…According to expressions of boundary velocity of Equations (5) and (6), the boundary slip velocity at the wall can be expressed, the slip length can be derived as According to Mattia's model, a low wall-water molecular interaction energy results in a low value of and a high value of , and the constant value of = 1 × 10 −9 m 2 /s and = 144 mJ/m 2 was used to express the water ow in CNTs [31]. Later, Zhang et al [6] and Cui et al [46] also used constant value to simulate the oil transport in shale nanopores. However, di erent types of nanopores are with di erent wall-water interactions, even if the same types of nanopores are with small di erence, the theoretical calculation of and for di erent wall-water interactions will be further discussed in the following sections.…”

Section: Boundary Slip Lengthmentioning

confidence: 99%

“…Mattia and Calabrò [31] proposed calculation formula of the slip length that depends on pore radius, pore length, and solidliquid molecular interactions based on experiments and MDS. Nevertheless, their method cannot directly consider the changes of solid-liquid molecular interactions and the slip length is not relevant to pore length from results of Cui et al [46] studies. erefore, it is of great signi cance to clarify the e ects of multimechanisms on the slip length through theoretical methods, or adopt new measured or simulation methods of experiments and MDS.…”

Section: Introductionmentioning

confidence: 99%

“…erefore, it is of great signi cance to clarify the e ects of multimechanisms on the slip length through theoretical methods, or adopt new measured or simulation methods of experiments and MDS. e theoretical formula of water ow enhancement factor is mostly obtained by the modi ed no-slip HP equation in which the viscosity of water is a constant value [6,26,31,46]. However, because of the wall-water molecular interactions, the water viscosity at the interface region is di erent from that in bulk region [47][48][49].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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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Section: Boundary Slip Lengthmentioning

confidence: 99%

Section: Boundary Slip Lengthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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“…At present, the study on the oil transport mechanisms in nanopores of shale is quite limited (Lu et al 2012;Falk et al 2015;Bousige et al 2016). The key physics of oil transport mechanisms in nanopores of shale are still held as mysteries (Cui et al 2017).…”

Section: Introductionmentioning

confidence: 99%

An analytical equation for oil transport in nanopores of oil shale considering viscosity distribution

Sun

Yao

et al. 2018

J Petrol Explor Prod Technol

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Huge amount of works was done on modeling of gas transport in nanopores (both organic and inorganic) of shale formation. However, the study on oil transport behaviors is quite limited. Based on the study on water transport in carbon nanotubes, an analytical model is developed for oil transport in nanopores of shale formation. The new model takes the effect of oil-wall interaction on the oil viscosity in the adsorption region into consideration. Results show that: (1) the oil-wall interaction on oil viscosity in the adsorption region plays an important role in oil transport behaviors and cannot be neglected; (2) when the critical thickness is smaller than 1 nm, the volume flux increases slowly with increasing contact angle; (3) when the critical thickness increases to 2 nm, the volume flux increases rapidly to infinity when the contact angle is larger than 140°.

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Semianalytical method of two‐phase liquid transport in shale reservoirs and its application in fracture characterization

Zhang

Emami-Meybodi

2021

AIChE Journal

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This study presents a new semi-analytical method to simulate the two-phase liquid transport in hydraulic fractures (HF) and matrix system, which can be applied to characterize HF attributes and dynamics using the flowback data from hydraulically fractured shale oil wells. The proposed approach includes a fracture model for HF properties calculation and a matrix model capable of considering multiple liquid transport mechanisms in shale nanopores. The proposed method is first validated with the numerical simulation then applied to a field example in Eagle Ford shale. The numerical validation confirms that our method can accurately characterize fracture attributes and closure dynamics by closely estimating the initial fracture permeability, pore-volume, compressibility, and permeability modulus. Furthermore, the analysis results from numerical simulation and a field example both indicate a clear flow enhancement and deficit for oil and water transport, respectively, due to the slippage effect and variation of fluid properties inside nanopores.

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Liquid permeability of organic nanopores in shale: Calculation and analysis

Cited by 74 publications

References 76 publications

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

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

An analytical equation for oil transport in nanopores of oil shale considering viscosity distribution

Semianalytical method of two‐phase liquid transport in shale reservoirs and its application in fracture characterization

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