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J. Long, J. Remer, C. Wilson, P. Witherspoon (1982)
Porous media equivalents for networks of discontinuous fracturesWater Resources Research, 18
John Miller, D. Allman (1986)
Dual Permeability Modeling of Flow in a Fractured Geothermal Reservoir
K. Pruess (1985)
Quantitative model of vapor dominated geothermal reservoirs as heat pipes in fractured porous rock
K. Pruess, T. Narasimhan (1985)
A PRACTICAL METHOD FOR MODELING FLUID AND HEAT FLOW IN FRACTURED POROUS MEDIASociety of Petroleum Engineers Journal, 25
K. Pruess, Y. Tsang, J.S.Y. Wang (1984)
MODELING OF STRONGLY HEAT-DRIVEN FLOW IN PARTIALLY SATURATED FRACTURED POROUS MEDIA
J. Warren, P. Root (1963)
The Behavior of Naturally Fractured ReservoirsSociety of Petroleum Engineers Journal, 3
K. Pruess, T. Narasimhan (1982)
On fluid reserves and the production of superheated steam from fractured, vapor‐dominated geothermal reservoirsJournal of Geophysical Research, 87
M. Sorey, M. Grant, E. Bradford (1980)
Nonlinear effects in two-phase flow to wells in geothermal reservoirsWater Resources Research, 16
K. Pruess, J. Wang, Y. Tsang (1990)
On thermohydrologic conditions near high‐level nuclear wastes emplaced in partially saturated fractured tuff: 1. Simulation studies with explicit consideration of fracture effectsWater Resources Research, 26
G. Barenblatt, I. Zheltov, I. Kochina (1960)
Basic concepts in the theory of seepage of homogeneous liquids in fissured rocks [strata]Journal of Applied Mathematics and Mechanics, 24
J. Wang, T. Narasimhan (1985)
Hydrologic Mechanisms Governing Fluid Flow in a Partially Saturated, Fractured, Porous MediumWater Resources Research, 21
P. Montazer, W. Wilson (1984)
Conceptual hydrologic model of flow in the unsaturated zone, Yucca Mountain, NevadaWater-Resources Investigations Report
A. Moench (1983)
Well Test Analysis in Naturally Fissured, Geothermal Reservoirs with Fracture Skin
R. Peters, E. Klavetter (1988)
A continuum model for water movement in an unsaturated fractured rock massWater Resources Research, 24
Y. Tsang, K. Pruess (1987)
A study of thermally induced convection near a high‐level nuclear waste repository in partially saturated fractured tuffWater Resources Research, 23
E. Klavetter, R. Peters (1986)
Fluid flow in a fractured rock mass
K. Pruess, J.S.Y. Wang, Y. Tsang (1988)
Effective continuum approximation for modeling fluid and heat flow in fractured porous tuff: Nevada Nuclear Waste Storage Investigations Project
This paper presents an effective continuum approximation for modeling of fluid and heat flow in fractured porous media. The approximation is based on the thermohydrologic behavior observed in detailed simulations with explicit consideration of fracture effects (see the companion paper, part 1.) The crucial concept in the development of an effective continuum approximation is the notion of local thermodynamic equilibrium between rock matrix and fractures. Where applicable it provides a substantial simplification of the description of fluid and heat flow in fractured porous media. We derive formulas for effective continuum characteristic curves (relative permeabilities and capillary pressures) in terms of the properties of fracture and matrix continua, respectively. Numerical simulations demonstrate that under favorable conditions the effective continuum approximation closely matches predictions obtained from an explicit modeling of fracture effects. It is also demonstrated that the approximation breaks down under unfavorable conditions (very tight rock matrix). A simple criterion for the applicability of an effective continuum approximation is derived from consideration of diffusive processes. A quantitative evaluation shows the criterion to be consistent with results of our numerical simulations.
Water Resources Research – Wiley
Published: Jun 1, 1990
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