Please use this identifier to cite or link to this item: https://hdl.handle.net/10593/13891
Title: Modelling geothermal conditions in part of the Szczecin Trough – the Chociwel area
Authors: Miecznik, Maciej
Sowiżdżał, Anna
Tomaszewska, Barbara
Pająk, Leszek
Keywords: Szczecin Trough
geothermal conditions
numerical model
binary system
ORC
Issue Date: Sep-2015
Publisher: Instytut Geologii UAM
Citation: Geologos, 2015, 21, 3. s.187-196
Abstract: The Chociwel region is part of the Szczecin Trough and constitutes the northeastern segment of the extended Szczecin- Gorzów Synclinorium . Lower Jurassic reservoirs of high permeability of up to 1145 mD can discharge geothermal waters with a rate exceeding 250 m 3 /h and temperatures reach over 90°C in the lowermost part of the reservoirs. These conditions provide an opportunity to generate electricity from heat accumulated in geothermal waters using binary ORC (Organic Rankine Cycle) systems. A numerical model of the natural state and exploitation conditions was created for the Chociwel area with the use of TOUGH2 geothermal simulator (i.e., integral finite-difference method). An anal- ysis of geological and hydrogeothermal data indicates that the best conditions are found to the southeast of the town of Chociwel, where the bottom part of the reservoir reaches 3 km below ground . This would require drilling two new wells, namely one production and one injection. Simulated production with a flow rate of 275 m 3 /h, a temperature of 89°C at the wellhead, 30°C injection temperature and wells being 1.2 km separated from each other leads to a small temperature drop and moderate requirements for pumping power over a 50 years’ time span. The ORC binary system can produce at maximum 592.5 kW gross power with the R227ea found as the most suitable working fluid. Geothermal brine leaving the ORC system with a temperature c. 53°C can be used for other purposes, namely mushroom growing, balneology, swimming pools, soil warming, de-icing, fish farming and for heat pumps.
URI: http://hdl.handle.net/10593/13891
ISBN: 978-83-232187-4-6
ISSN: 1426-8981
Appears in Collections:Geologos, 2015, 21, 3

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