A pore network model for simulating non-ideal gas flow in micro- and nano-porous materials

Ma, Jingsheng; Sánchez, Juan Pablo; Wu, Kaihua; Couples, Gary Douglas; Jiang, Zeyun

doi:10.1016/j.fuel.2013.08.041

Cited by 138 publications

(72 citation statements)

References 52 publications

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“…This may be the important reason for the remarkable difference between these two types of capacitors. Another reason may be the complexity of channels for ion transportation (Ma et al 2014). …”

Section: Preliminary Explanationmentioning

confidence: 99%

Study of the properties of non-gas dielectric capacitors in porous media

2015

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The size of pores and throats is at the nanometer scale in tight oil and shale gas zones, and the resistivity of these reservoirs is very high, so the reservoirs show more dielectric properties than conductivity properties. The conductive and dielectric characteristics of a parallel plate capacitor full of fresh water, NaCl solutions, and solid dielectrics, for example, sands are investigated in this paper, and the capacitance data of the non-gas capacitor are measured at different salinities and frequencies by a spectrum analyzer. The experimental results illustrate that the capacitance of this kind of capacitor is directly proportional to the salinity of the solutions and inversely proportional to the measuring frequency, the same as a vacuum parallel plate capacitor. The remarkable phenomenon, however, is that the capacitance is inversely proportional to the square of the distance between two plates. The specific characteristic of this capacitor is different from the conventional parallel plate capacitor. In order to explain this phenomenon, the paper proposed a new concept, named ''single micro ion capacitor'', and established a novel model to describe the characteristics of this particular capacitor. Based on this new model, the theoretical capacitance value of the single micro ion capacitor is calculated, and its polarization and relaxation mechanisms are analyzed.

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Section: Preliminary Explanationmentioning

confidence: 99%

Study of the properties of non-gas dielectric capacitors in porous media

2015

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“…However, building a pore network model for 3D flow simulations in heterogeneous fine-grained rocks is an unresolved issue. Some approaches extract 3D pore data directly from FIB-SEM [31] or use the Markov chain Monte Carlo (MCMC) reconstruction method on 2D images [32,33]. Whether these complex pore network models are representative for the sample is another uncertainty [17,31,34].…”

Section: Introductionmentioning

confidence: 99%

Using BIB-SEM Imaging for Permeability Prediction in Heterogeneous Shales

et al. 2017

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Organic-rich shale samples from a lacustrine sedimentary sequence of the Newark Basin (New Jersey, USA) are investigated by combining Broad Ion Beam polishing with Scanning Electron Microscopy (BIB-SEM). We model permeability from this 2D data and compare our results with measured petrophysical properties. Three samples with total organic carbon (TOC) contents ranging from 0.7% to 2.9% and permeabilities ranging from 4 to 160 nD are selected. Pore space is imaged at high resolution (at 20,000x magnification) and segmented from representative BIB-SEM maps. Modeled permeabilities, derived using the capillary tube model (CTM) on segmented pores, range from 2.3 nD to 310 nD and are relatively close to measured intrinsic permeabilities. SEM-visible porosities range from 0.1% to 1.8% increasing with TOC, in agreement with our measurements. The CTM predicts permeability correctly within one order of magnitude. The results of this work demonstrate the potential of 2D BIB-SEM for calculating transport properties of heterogeneous shales.

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“…A two-dimensional dynamic network model of water flooding with solid-liquid molecule interaction was established in porous media [40]. Ma et al [41] proposed the pore-network flow model (PNFM) method to reconstruct a realistic three-dimensional micro model by extracting 2D shale sample sections, where each coefficient was usually indicative of a decrease in temperature and pressure within the space of van der Waals. So far, the interfacial effects have only been considered into one-or two-dimensional models, but in this paper the research addressing three-dimensional micro-network models with solid-liquid interfacial effects is emphasized.…”

Section: Introductionmentioning

confidence: 99%

Solid-Liquid Interfacial Effects on Residual Oil Distribution Utilizing Three-Dimensional Micro Network Models

Zhu

Liu

et al. 2017

Energies

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A number of experiments on fluid flow at the micro/nano-scale have demonstrated that flow velocity obviously deviates from the classical Poiseuille's law due to the micro forces between the wall and the fluid. Based on an oil-water two-phase network simulation model, a three-dimensional pore-scale micro network model with solid-liquid interfacial effects was established. The influences of solid-liquid interface effects including van der Waals force and wettability on the residual oil distribution and relative permeability were investigated through microscopic simulation. The effects of pore radius, pore-throat size ratio, shaping factor, and coordination number on the residual oil distribution were analyzed at the same time. The results showed that the oil recovery would be overestimated by about 4% without van der Waals force in a water-wet reservoir. The impact of van der Waals force on water-wet reservoirs was significantly obvious in contrast with oil-wet reservoirs. In addition, the residual oil distribution was significantly influenced by pore radius in water-wet reservoir, comparatively influenced by pore-throat size ratio in oil-wet reservoir. The present study illustrates the successful application of three-dimensional micro network models considering solid-liquid interfacial effects, and provides new insights for oil recovery enhancement.

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A pore network model for simulating non-ideal gas flow in micro- and nano-porous materials

Cited by 138 publications

References 52 publications

Study of the properties of non-gas dielectric capacitors in porous media

Study of the properties of non-gas dielectric capacitors in porous media

Using BIB-SEM Imaging for Permeability Prediction in Heterogeneous Shales

Solid-Liquid Interfacial Effects on Residual Oil Distribution Utilizing Three-Dimensional Micro Network Models

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