M. ALBU1, D. ENACHESCU2
1Comisia Republicana de Rezerve Geologice, Bucuresti
2Centrul de Calcul al Universitatii Bucuresti
ON THE SIMULATION OF THE BEHAVOIUR OF HYDROTHERMOMINERAL
UNDERGROUND SYSTEMS
(Abstract)
The hydraulic, dispersional and thermic diffusivity is reponsible for the progressive propagation of the accumulation and discharging of water, mineralization and respectively, heat in an aquiferous rock. For reasons of mathematical advantage, a study of the displacement of some continuous media, hydrothermodynamically equivalent but whose behaviour can be described by the lows of classical physics for fluids, was preferred to that of the actual propagation of water, mineralization and heat. By means of the equations of continuity and of state, by means of Darcy's filtration, Fick's diffusion and Fourier's thermoconduction linear lows, the most general equations of hydraulic, dispersional and thermic diffusivity were established. Finite difference equations are presented making possible not only the determination of the parameters of the hydrothermomineral system, whose exploitation in a certain variant is under way, but also the simulation of the exploitation in any given variant is under way, but also the simulation of the exploitation in any given variant characterized by different pattnerns and rates of production of the wells with the investigated domain. These equations were obtained by discretising the equations of horizontal diffusivity under the conditions imposed by the conservation of the characteristics of the simulated continuous medium. As an example, one presents the results obtained by integrating numerically the hydraulic, dispersional and thermic diffusivity equations for a specific subdomain of the Biharia-Sacuieni hydrothermomineral system located in the upper pannonian sediments.