Fluid flow in porous systems driven by capillary pressure is one of the most ubiquitous phenomena nature and industry, including petroleum hydraulic engineering as well material life sciences. The classical Lucas–Washburn (LW) equation its modified forms were developed have been applied extensively to elucidate fundamental mechanisms underlying basic statics dynamics capillary-driven systems. LW assumes that fluids are incompressible Newton ones channels all same radii. This kind hypothesis...

Abstract X‐ray microtomography (micro‐CT) provides a nondestructive way for estimating rock properties such as relative permeability. Relative permeability is computed on the fluid distributions generated three dimensional images of pore structure rock. However, it difficult to numerically reproduce actual at scale, particularly mixed‐wet Recent advances in imaging technologies have made possible directly resolve large field view arbitrary wetting conditions. Herein, objective this study...

Abstract This study investigates the energy signature associated with multiphase flow in porous media displacement regimes. We proposed that net efficiency, as conversion of external work applied to surface generated, provides new insights into transition The combined effects wettability and rates on immiscible fluid‐fluid is experimentally investigated using high‐resolution imaging microfluidic cells, which allows for tracking evolution interfacial area under work. Our focuses morphology...

Traditional correlation analyses based on whole-rock data have limitations in discerning pore development determinants shale oil reservoir, given the complex lithology of formations and intricate interdependencies (multicollinearity) among geological variables. In this study, mercury injection capillary pressure digital analysis scanning electron microscopy were employed to examine macropore structures both whole rocks their constituent lithologies for Upper Triassic Chang-7 Ordos Basin....

The Dapingzhang Cu-polymetallic deposit in Yunnan is a volcanic massive sulfide (VMS) deposit, located on the western edge of Lanping–Simao block. Recently, gold-rich polymetallic orebodies with significant economic value have been discovered. However, occurrence and enrichment mechanisms gold remain unclear. This study investigates (V1) through detailed geological surveys. Techniques such as optical microscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), probe...

Summary Image-based computations of relative permeability require a description fluid distributions in the pore space. Recent advances imaging technologies have made it possible to directly resolve actual at scale, thus capturing large field view for arbitrary wetting conditions, which are numerically difficult reproduce. In previous studies, were not imaged under in-situ may cause oil (nonwetting) phase snap off. Consequently, computed is underestimated, particularly low saturations. This...

Forced imbibition, the invasion of a wetting fluid into porous rocks, plays an important role in effective exploitation hydrocarbon resources and geological sequestration carbon dioxide. However, interface dynamics influenced by complex topology commonly leads to non-wetting trapping. Particularly, underlying mechanisms under viscously unfavorable conditions remain unclear. This study employs direct numerical simulation method simulate forced imbibition through reconstructed digital rocks...

Abstract The effect of capillary pressure on multiphase flow is described by the gradient term in fractional equation. This typically neglected during core‐flooding experiments, as it not easily accessible. However, constant core flooding owing to a discontinuity at outlet. By imaging spatial fluid distributions under two‐phase steady‐state flow, we determine situ phase saturations and pressures from interfacial curvature measurements along an entire core, thus achieving assessment its...

Summary Wettability is a major factor that influences multiphase flow in porous media. Numerous experimental studies have reported wettability effects on relative permeability. Laboratory determination for the impact of permeability continues to be challenge because difficulties with quantifying alteration, correcting capillary-end effect, and observing pore-scale regimes during core-scale experiments. Herein, we studied alteration by integrating laboratory steady-state experiments in-situ...

Image-based computations of relative permeability require a description fluid distributions in the pore space. Usually are computed on imaged Recent advances imaging technologies have made it possible to directly resolve actual at scale, thus capturing large field view for arbitrary wetting conditions, which numerically difficult reproduce. In previous studies were not under in-situ condition, may cause oil (non-wetting) phase snap-off. Consequently is underestimated particularly low...

High resolution micro-computed tomography images for multiphase flow provide us an effective tool to understand the mechanism of fluid in porous media, which is not only fundamental understanding macroscopic measurements but also providing benchmark datasets validate pore-scale modeling. In this study, we start from two pore scale imaging two-phase obtained experimentally under situ conditions at different water fractional flows water-wet and mixed-wet conditions. Then, fractal dimension,...

Capillarity refers to the phenomenon of fluids imbibing into fine pores or porous rocks and materials due surface energy, through action capillary pressure.The pressure causes deformable interfaces formed between two phase in contact with each other, such as a liquid vapor.Capillarity its importance have been widely recognized various fields, including civil engineering, soil science, hydrology, carbon storage, petroleum engineering.More than century ago, classical Young-Laplace equation...

Earth and Space Science Open Archive PosterOpen AccessYou are viewing the latest version by default [v1]Mechanisms of wettability control on two-phase immiscible displacement in microfluidic porous mediaAuthorsNongKangiDPeixingXuShuangmeiZouCongjiaoXieSee all authors Nong KangiDCorresponding Author• Submitting AuthorChina University geosciences WuHaniDhttps://orcid.org/0000-0003-2301-0917view email addressThe was not providedcopy addressPeixing XuChina WuHanview addressShuangmei ZouChina...