Tight sandstone reservoirs, as typical unconventional have attracted more and attention worldwide. Compared to conventional the complex microscopic pore structures micro-fractures of tight reservoirs are developed, fluid flow in reservoir is very complicated. Therefore, studying influence fractures on rock topological structure characteristics between matrix critical development reservoirs. In ...

This study provides a numerical approach to evaluate the effect of sample sizes on fluid flow through single rough-walled fracture. The fracture was generated by using mathematical statistics. Its aperture follows normal distribution along large-size plane dimensions 20 m × m, and from this plane, series fractures with different were extracted. Then, two-dimensional (2D) Reynolds equation solve...

Fracture network modelling and a hydrological evaluation were performed in well more than 900 m deep that penetrated the Boda Claystone Formation, potential host rock for high-level nuclear waste disposal facilities Hungary. The fracture geometry was generated with discrete algorithm, which permeability porosity of system can be calculated if aperture fractures is known. estimated via an calibr...

Comprehensive information on fracture network properties around a borehole is indispensable for developing hydrogeological site descriptive model. However, such usually relies various cross-hole field tests at high cost. This study presents cost-effective option regarding the identification of density borehole. Based packer-test and drilling-core data from 104 boreholes in Taiwan mountainous ar...

The finite element method is a powerful and general numerical used to simulate subsurface processes. In this paper, we take recent hydraulic fracturing propagation algorithms assess their performance when within the framework. particular, evaluate aperture energy-based methodologies that are capable of extracting velocity fracture propagating throughout toughness viscous regime. Such have benef...

An appreciation of the dissolution from entrapped nonaqueous phase liquids (NAPLs) in fractures is essential as we attempt to understand and predict the fate of NAPLs present in fractured rock systems. Eight long-term dissolution experiments using 1,1,1-trichloroethane and trichloroethylene were conducted in two laboratory-scale dolomitic limestone variable aperture fractures under various cond...

The work presented in this article is composed of 2-dimensional groundwater flow simulations for fractured porous media with different aperture fractures by using the Analytic Element Method. In order to investigate behavior and its effect on fractures, we considered systems varying apertures, hydraulic conductivities orientations presence uniform field a well. We also introduced matrix method ...

This work employed numerical experiments simulating colloid and solute transport in single parallel-plate fractures, using the random walk particle tracking method, to demonstrate that (1) there exists an aspect ratio of the colloid radius to half the fracture aperture, delta(o), where the average velocities of colloids and solutes are similar. When delta>delta(o), the velocity distribution ass...

Flow and transport are studied in transparent model fractures with rough complementary self-affine walls with a relative shear displacement ~u. The aperture field is shown to display long range correlations perpendicular to ~u: for flow in that direction, the width and geometry of the front of a dyed shear-thinning polymer solution displacing a transparent one have been studied as a function of...