Simulation of Heat Transport in Fractured, Single-Phase Geothermal Reservoirs

Abstract

Although many geothermal reservoirs depend upon fracture permeability to obtain adequate mass flows, relatively little research effort has been directed toward fractured reservoir simulation. This paper outlines the mathematical apparatus necessary to develop a numerical simulator for a fractured, single-phase geothermal reservoir. It is assumed that the fracturing is extensive and well-distributed (though not necessarily uniform) so that it is reasonable to consider a superficial discharge through the fractures as well as the pores. While mass and heat transport are of course coupled in a system of this kind, we have subdivided the ensuing discussion into mass flow and heat flow for clarity of presentation.