Now showing items 1-10 of 13
Electrical conductivity of fractured media: A computational study of the self-consistent method
(Society of Exploration Geophysicists, 2012)
Effective medium theory can be used to link conductivity estimation methods with prior knowledge about the distribution of fractures in the investigated geological structure. In the literature, little work has been ...
A 3D computational study of effective medium methods applied to fractured media
This work evaluates and improves upon existing effective medium methods for permeability upscaling in fractured media. Specifically, we are concerned with the asymmetric self-consistent, symmetric self-consistent, and ...
A Streamline Front Tracking Method for Two- and Three-Phase Flow Including Capillary Forces
(American Mathematical Society, 2002)
Linear and nonlinear convection in porous media between coaxial cylinders
We uncover novel features of three-dimensional natural convection in porous media by investigating convection in an annular porous cavity contained between two vertical coaxial cylinders. The investigations are made using ...
Influence of natural convection in a porous medium when producing from borehole heat exchangers
(WileyAmerican Geophysical Union, 2013-08)
Convection currents in a porous medium form when the medium is subject to sufficient heating from below (or equivalently, cooling from above) or when cooled or heated from the side. In the context of geothermal energy ...
An Approach for Investigation of Geochemical Rock-Fluid Interactions
(Stanford University, 2014)
Geochemistry has a substantial impact in exploiting of geothermal systems. When water is injected in a geothermal reservoir, the injected water and in-situ brine have different temperatures and chemical compositions and ...
Postinjection Normal Closure of Fractures as a Mechanism for Induced Seismicity
(American Geophysical Union, 2017-10-04)
Understanding the controlling mechanisms underlying injection-induced seismicity is important for optimizing reservoir productivity and addressing seismicity-related concerns related to hydraulic stimulation in Enhanced ...
Modelling of the Shear Dilation Based Hydraulic Stimulation in Enhanced Geothermal Systems Considering Fractures in Different Scales
A numerical approach for modelling of shear dilation of existing fractures in hydraulic stimulation of geothermal reservoirs at low elevated pressures is presented. The fractured rock in the reservoir is modelled as ...
Upscaling of Nonisothermal Reactive Porous Media Flow under Dominant Péclet Number: The Effect of Changing Porosity
(Society for Industrial and Applied Mathematics, 2016)
Motivated by rock-fluid interactions occurring in a geothermal reservoir, we present a two-dimensional pore scale model of a thin strip consisting of void space and grains, with fluid flow through the void space. Ions in ...
High-accuracy phase-field models for brittle fracture based on a new family of degradation functions
Phase-field approaches to fracture based on energy minimization principles have been rapidly gaining popularity in recent years, and are particularly well-suited for simulating crack initiation and growth in complex fracture ...