We propose a new conceptual model of fractureflow-enhanced matrix diffusion, which correlates with fracture-flow velocity, i.e., matrix diffusion enhancement induced by rapid fluid flow within fractures. According to the boundary-layer or film theory, fracture flow enhanced matrix diffusion may dominate mass-transfer processes at fracture-matrix interfaces, because rapid flow along fractures re...

Introduction Conclusions References

Tight, low-porosity reservoirs can produce significant amounts of hydrocarbons if fracture networks provide the necessary permeability. Characterization of naturally fractured reservoirs using surface seismic data is an important exploration problem that has attracted much attention in the literature. TLE, for example, had an entire issue (August 1996) on this subject. While the data and modeli...

Abstract Blasting performance is influenced by mechanical and structural properties of the rock, on one side, blast design parameters other. This paper describes a new methodology to assess rock mass quality from drill-monitoring data guide blasting in open pit operations. Principal component analysis has been used combine measurement while drilling (MWD) information two drill rigs; corrections...

Cracks in a rock mass subjected to a uniaxial stress will be preferentially closed depending on the angle between the fracture normal and the direction of the applied stress. If the prestress fracture distribution is isotropic, the effective elastic properties of such a material are then transversely isotropic due to the preferred alignment of the cracks. Velocity measurements in multiple direc...

Xu, S. 2000. Effect of Uncertainty of Rock Properties on Radionuclide Transport by Groundwater: Implications for Performance Assessments of the Repository of Spent Nuclear Fuel in Heterogeneous Bedrock. Acta Universitatis Upsaliensis. Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 590. 48 pp. Uppsala. ISBN 91-554-4871-2. The overall objective of the ...

Ž . Ž . Cluster variable aperture CVA simulated annealing SA is an inversion technique to construct fluid flow models in fractured rocks based on the transient pressure data from hydraulic tests. A two-dimensional fracture network system is represented as a filled regular lattice of fracture elements. The algorithm iteratively changes element apertures for a cluster of fracture elements in orde...

an important concern in rock mechanics is non-homogeneity as joints or fault. adopting the joints as fractures, fractures are well known for their effects on the mechanical and transport properties of rock. it has been postulated that through fractured/jointed rock, mainly, the polygons turned to the shear vector (ti) are involved in the mobilization of shear resistance. consequently, in order ...