Drilling of geothermal boreholes and casing design in Poland

Abstract

Geothermal boreholes have to be designed and done as engineering facilities, i.e. they have to meet requirements resulting from their location and aim so as to ensure durability, maintenance and conditions for proper exploitation. The construction of the borehole is one of key elements which need to be designed.
In the paper, geothermal boreholes are boreholes for production and injection of thermal waters for heating and recreation. Boreholes for geothermics in spas (crenotherapy, bathing, balneotherapy) and geothermal boreholes involving heat pumps were not analyzed. Construction of existing geothermal boreholes in Poland is presented. The focal point is the piping and materials used for it. The paper presents dates of construction, method of aquifer production and type of closure for boreholes. Additionally, production boreholes are presented along with their efficiency and the temperature of produced water measured at the head.