Estonia to explore thermal energy potential of Gdov groundwater complex

  • 2022-08-03
  • BNS/TBT Staff

TALLINN – The Geological Survey of Estonia has announced a public procurement to find a core drilling contractor to study the thermal energy potential of the Gdov aquifer, or groundwater complex. 

The Geological Survey of Estonia has been commissioned by the government to carry out a comprehensive study to assess the technical and economic viability of geothermal energy uses in northern Estonia.

To this end, it is necessary to carry out drilling work with accompanying lithological, geochemical and geophysical surveys and the conduct of pumping tests to assess the hydraulic parameters of the Gdov groundwater complex for the purpose of tapping into its geothermal potential, the procurement documents say.  

The expected depth of the vertical survey well is 250 meters, but since the geological cross-section at the intended drilling site is not known in detail, the necessary depth may turn out to be bigger or smaller by one-fifth.   

Tenders can be submitted until Sept. 2. The contract will be concluded for 12 months.

The Geological Survey of Estonia launched a pilot project for the use of geothermal energy last year. In the course of the project, the potential of geothermal energy in different parts of Estonia will be studied in detail and two geothermal energy test stations will be built.    

Exploration and deployment of geothermal energy is important because it is a renewable energy source that helps to reduce greenhouse gas emissions. As a result of the project, it will become clear whether geothermal energy is a technically suitable and economically viable energy solution for heating, cooling and energy storage in Estonia.

The project will run until the end of 2024, with a budget of 3.8 million euros that is funded with money from the sale of greenhouse gas emission allowances.