Fracture reservoirs contain most of the oil reserves of the Middle East. Such reservoirs are poorly understood and recovery from fractured reservoirs is typically lower than those from conventional reservoirs. Many efforts have been made to enhance the recovery and production potential of these reservoirs. Fractured reservoirs with high matrix porosity and low matrix permeability need a seconda...

Fine-scale discrete fracture simulations provide a natural means to quantify the matrix-fracture fluxes and specify reference solutions for upscaling approaches such as dual porosity/dual permeability models. Since typically fine-scale are computationally demanding, fractured reservoirs highly heterogeneous, it is desirable parametrize geometry obtain coarse-scale model closures using precomput...

The Integral Porosity and Dual Integral Porosity two-dimensional shallow water models have been proposed recently as e cient upscaled models for urban oods. Very little is known so far about their consistency and wave propagation properties. Simple numerical experiments show that both models are unusually sensitive to the computational grid. In the present paper, a two-dimensional consistency a...

[1] We have imaged sea ice single crystals with X-ray computed tomography, and characterized the thermal evolution of the pore space with percolation theory. Between !18!C and !3!C the porosity ranged from 2 to 12% and we found arrays of near-parallel intracrystalline brine layers whose connectivity and complex morphology varied with temperature. We have computed key porosity-dependent function...

This article presents a method for simulation of continuous and discrete fracture parameters distributions in hydrocarbon reservoirs using Sequential Indicator Simulation (SIS) and Sequential Gaussian Simulation (SGS) methods. Fracture parameters including azimuth, dip and density are integrated with the porosity and permeability values determined in the models. Based on this study we have iden...

Introduction In this study, we contemplate to prepare a new type of scaffold which mimics natural bone and consists of three different components, namely biphasic polymeric base from two different biodegradable polymers prepared by using dual porogen approach, bioactive agents, i.e., collagen and hydroxyapatite (HA) particles which distributed throughout the scaffold only on the pore surfaces. ...

Abstract In the petroleum industry, accurate calculation of equivalent permeability dual medium is very important for estimation reserves and design oil gas production. At present, there are many methods to calculate medium. These have their own advantages disadvantages, suitable different characteristics physical problems, but they cannot under reservoir conditions. Thus, emergence fractal the...

Various models of mass transport and diffusion through heterogeneous media lead to systems of partial differential equations which share a rather general structure. Among the most successful of these are the dual porosity models, and these vary considerably in complexity. The simplest of these are the parallel flow models consisting of two independent flow equations coupled by an exchange propo...

Abstract. It is shown that there exists a weak solution to a degenerate and singular elliptic-parabolic partial integro-differential system of equations. These equations model two-phase incompressible flow of immiscible fluids in either an ordinary porous medium or in a naturally fractured porous medium. The full model is of dual-porosity type, though the single porosity case is covered by sett...