Analysis of Uniejów Geothermal Water Reservoirs Modeling in View of Various Aspects of Geothermal Water and Heat Management

Abstract

The results of modeling a geothermal water reservoir in Uniejów (C-Poland), obtained with the use of a numerical simulator TOUGH2.0, are presented in the paper. The behavior of the reservoir was analyzed for three exploitation variants. A number of heat and water management exploitation scenarios were accounted for.
Simulations were made for the following assumptions:
• Present rate of geothermal water production (120 m3/h); water is cooled and injected into two injection wells;
• Double-size geothermal water production with an additional geothermal well (240 m3/h); water is cooled and injected into two injection wells at a rate of 120 m3/h. The remaining water is treated and discharged to a surface water course;
• Double-size geothermal water production with an additional geothermal well (240 m3/h); water is cooled and injected into two injection wells.
These simulations enabled one to determine the influence of the flow rate of exploited and injected water on the formation pressure value. On this basis a multivariant method of managing geothermal heat and water in Uniejów has been worked out.