Establishment of boundary conditions of hydrodynamic digital model of Tbilisi thermal water deposits; Creation of conceptual model; Model calibration

Author: Nino Kapanadze
Co-authors: Dr. George Melikadze; Dr. Genadi Kobzev
Keywords: Geothermal deposit, Hydrodynamic digital model, hydrodynamical parameters, model calibration
Annotation:

By the amount of observed resources, their degree of thermal potential and exploitation perspectives thermal water deposits in Tbilisi is very promising; thus assessment of their conditions should be regarded as the most important task. It is obvious that digital modeling of basin is one of the main parts of proposed research which finally is aimed to complex geologic, hydrogeologic and geophysical investigation of Tbilisi hydrothermal area, and evaluation of its hydrodynamics, parameters and water resources as well as assessment of steady development scenarios. The digital model represents a cornerstone of project, which enables evaluation of different scenarios of development and exploitation of geothermal deposit. Digital modelling is carried out based on widely accepted approach (see e.g. Domenico and Schwartz, 1998; Middlemis, 2000) using Feflow software and consisted of following steps: • Construction of the geological structure containing aquifer and study of its lithological composition. • Determination of the depth and thickness of groundwater deposit; establishment of flow directions; • Evaluation of the amount of heat flow; • Determination of hydrodynamic parameters (hydraulic conductivity, transmissivity and storativity etc.); • Establishment of boundary conditions of investigated region and creation of conceptual model; realization of numerical model. • Working out of recommendations for environmentally reasonable regime of exploitation.