Finland: Stimulation Begins at at the Espoo Geothermal Deep Heat Project

Stimulation underway at st1 Deep Heat project (SMU)

By Peter Malin, SMU Adjunct Faculty

Stimulation of the 6.4 km OTN-III well at the st1 Deep Heat project in Espoo, Finland began on June 4, 2018 and continues to the present time. 

There are 5 stages of packed-off, ball-operated hydraulic-stimulation equipment along the uncased bottom 750 m of the well. About 10,000 cubic meters of drinking-quality water have been injected via 3 of the 5 stages, with pumping currently occurring on stage 4.

The engineering calculations provide a target volume of 18,000 cubic meters of water across the five stages for an economic return.

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