The study of pore level displacement of immiscible fluids has scientific appeal as well as many applications, notably in oil reservoir engineering and in subsurface environmental engineering. Pore network models have been used for numerical simulation of fluid displacement over relevant physical volume sizes. An accurate description of the mechanics of displacement could significantly improve t...

Fracture-pore dual media plays an important role in soil and groundwater environmental protection. A new numerical method is developed to construct the fracture-pore this paper. In method, random fracture network with self-affine rough characteristic porous medium Berlin noise are constructed respectively, then superimposed fracture- pore medium. The construction of great significance simulatio...

We use X-ray microtomography (micro-CT) to image rock cuttings of poorly consolidated sandstone and vuggy carbonate from Saudi Arabian oil and gas fields. The cuttings are a few mm across and are imaged to a resolution between 3 and 12 microns. The details of the three-dimensional pore space can be clearly seen. A maximal ball algorithm is used to extract a topologically equivalent pore network...

We propose a pore-to-reservoir simulation approach for singlephase flow. Transport is modeled as a continuous-time random walk (CTRW). Particles make a series of transitions between nodes with a probability c(t)dt that a particle will first arrive at a node from a nearest neighbor in a time t to t+dt. A top-down multiscale approach is used to find the flow field. At the micron scale, c(t) for p...

The drying of liquid-saturated porous media is typically approached using macroscopic continuum models involving phenomenological coecients. Insight on these coecients can be obtained by a more fundamental study at the poreand pore-network levels. In this paper, we present a model based on a pore-network representation of porous media that accounts for various processes at the pore-scale. The...

• Calcite dissolution can generate a spectrum of pore shape geometries. In existing PNMs, conductance relations ignore evolution. New were derived from single scale simulations. These are function volume and imposed regime. Permeability may be overestimated by up to 27% if change is neglected. Pore network model simulation (PNM) an important method simulate reactive transport processes in porou...

The use of NMR spin-lattice relaxation experiments on water, or other proton-containing fluids, in a porous solid as a pore structure/size measurement tool has been recently reported for porous solids with pore size greater than ~ 5 nm. This approach has numerous advantages, as compared to nitrogen sorption/ condensation and mercury porosimetry, including no network/percolation effects, no pore...

Fluid flow in, and the thermal, electrical, and acoustic properties of porous media are determined primarily by the geometry and topology of the pore system. Here we illustrate a stochastic 3D space reconstruction model that uses thin section images as its main input. The approach involves a third-order Markov mesh that creates the reconstruction in a single scan; and overcomes the computationa...

Coarse-grained simulations in the united-atom-model approximation are used to investigate confinement-induced morphological changes in Nafion-like ionomers. The system we study models a cylindrical pore in a hydrophobic matrix of supporting material with pore diameters that vary from 0.7 to 3.96 nm. Simulation results indicate a strong dependence of the equilibrium ionomer structures both on th...