A brief review of the correlation between electrical properties and wetting behaviour in porous media

Li, Shuai; Hou, Shumeng

doi:10.26804/capi.2019.03.02

Cited by 18 publications

(4 citation statements)

References 27 publications

(41 reference statements)

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“…They believe that the rough hydrophobic surface with a regular structure is more conducive to the flow slip effect than the smooth hydrophobic surface. The stronger the hydrophobicity, the more obvious the flow slip effect and the longer the slip length. − …”

Section: Introductionmentioning

confidence: 99%

Effect of Nanoparticle Adsorption on the Pore Structure of a Coalbed Methane Reservoir: A Laboratory Experimental Study

Wang

Mao

et al. 2022

ACS Omega

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Coalbed methane (CBM) is an important unconventional energy resource, and its micropore structure has a vital impact on its exploitation. Based on the nuclear magnetic resonance (NMR) experiment, the low-temperature liquid nitrogen adsorption experiment, and the contact angle experiment, in this paper, we investigated the influence of nanofluids on the micropore structure of a CBM reservoir from many aspects. The influence of different adsorption mechanisms of TiO2 nanoparticles on the surface wettability of rock samples was analyzed. The influence of nanoparticle adsorption on the drainage and distribution of liquid in the rock sample was discussed in depth. In addition, the effects of nanofluid treatment on the micropore structure were investigated by comparing the data of low-temperature liquid nitrogen adsorption experiments, including the pore diameter, pore volume, and specific surface area (SSA). The experimental results show that the treatment of nanofluids helps to open the micropores and greatly increases the SSA, pore diameter, and pore volume of the sample. The maximum increase percentages of SSA, pore volume, and pore diameter are 228.12, 80.65, and 18.89%, respectively. It is found that the adsorption of particles is conducive to enhancing the water wettability of the pore throat surface and reducing the damage to water locks.

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Section: Introductionmentioning

confidence: 99%

Effect of Nanoparticle Adsorption on the Pore Structure of a Coalbed Methane Reservoir: A Laboratory Experimental Study

Wang

Mao

et al. 2022

ACS Omega

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“…Therefore, it coincides with the Debye length. This electric potential, that can be correlated with the wettability in porous media [25], is measurable with electrokinetics methods and takes the specific name of zeta potential (ζ). The Stern-Grahame model can be refined by including the formation of a surface layer of thickness d a that consists of specific adsorbed co-ions (Figure 2d).…”

Section: The Electrical Double Layermentioning

confidence: 99%

Electroviscous Effects in Stationary Solid Phase Suspensions

Rubio-Hernández

2021

Fluids

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Flowing through porous media is a matter of interest in different research fields such as medicine, engineering and science. The spontaneous appearance of ionic distribution at the solid liquid interface gives place to a reduction in the flow rate, which is generally named electroviscous effect. However, this should be differentiated in two more specific effects, the primary effect due to the distortion of ionic clouds, and the secondary effect due to the overlapping of ionic clouds. Theoretical and experimental works have not always been clearly conducted in order to separate both effects. Instead, they have been globally grouped. The purpose of this review is to revise theoretical and experimental bibliography on the electroviscous effect in stationary solid phase suspensions (porous plugs, membranes, microchannels, capillaries). The main conclusions of this brief revision are: (i) when ionic clouds are relatively small, it is possible to accept that only the primary effect is the cause for the apparent increase of the viscosity of the liquid phase when it is forced to flow relative to the stationary solid phase; (ii) although theory predicts a maximum for the variation of the overall electroviscous effect vs the relative size of the ionic cloud, it has been experimentally observed but not properly reasoned that its existence depends on the salt type; and (iii) it is necessary to justify why, if the fluid is non-Newtonian, electrokinetic parameters dominate the characteristics of the flow due to high pressure gradients, but the rheological parameters are more decisive when the flow is generated by low pressure gradients.

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“…Considering the positive correlation between permeability and porosity, it is only necessary to study the effects of permeability. The disintegration is a rapid process, leading to the change of pore structure (Li and Hou, 2019). Therefore, the permeability effects mainly happen in the initial disintegration stage.…”

Section: Effects Of Permeability and Porositymentioning

confidence: 99%

Effects of Dissociation Water Retention on Pore Structure Disintegration in Hydrate Sediments

Liu

Wang

et al. 2020

Front. Energy Res.

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During the depressurization process, natural gas hydrates (NGHs) decompose and release methane gas and water. Field experience shows that only 1% of the dissociation water is recovered, hindering the continuous pressure decline and further NGHs decomposition. The retention effect of the dissociation water on the pore structure is still unclear in NGHs sediments. In this paper, the hydrate sediment samples were tested for porosity, permeability, pore structure and clay minerals content, etc. The ions concentration change of solution was continuously measured using a conductivity meter to evaluate the disintegration mechanism of sediments. The results show that the pore structure of sediments tend to disintegrate under the action of dissociation water, leading to an increase in the ions concentration of dissociation water. According to the ions concentration curve, the sediment disintegration is divided into two stages. The rapid disintegration stage is mainly related to clay minerals. The slow disintegration stage is mainly related to the dissolution of soluble salt minerals. The initial water content is the main factor affecting the disintegration of the sediment skeleton. Under the condition of low initial water content, the sediment skeleton disintegrates instantaneously in dissociation water. When the initial water content exceeds 30.6–37.9%, the pore structure of sediments tends to be stable in dissociation water. Studying the effect of dissociation water on the sediment pore structure is helpful to understand the mechanism of low water production and to optimize the exploitation regime of gas hydrate.

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A brief review of the correlation between electrical properties and wetting behaviour in porous media

Cited by 18 publications

References 27 publications

Effect of Nanoparticle Adsorption on the Pore Structure of a Coalbed Methane Reservoir: A Laboratory Experimental Study

Effect of Nanoparticle Adsorption on the Pore Structure of a Coalbed Methane Reservoir: A Laboratory Experimental Study

Electroviscous Effects in Stationary Solid Phase Suspensions

Effects of Dissociation Water Retention on Pore Structure Disintegration in Hydrate Sediments

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