The Earth’s core isn’t expected to cool down for another 91 billion years, so as far as renewable energy goes, it’s the champ. Deep Earth Energy Production (DEEP) is looking to leverage that energy with the development of Canada’s first large-scale purel
Projects, TechnologyDEEP - Deep Earth Energy Production is developing Canada’s first large-scale purely geothermal power facility, located about a half-hour’s drive southwest of Estevan in southeast Saskatchewan.
The project has been under development for more than 10 years and leverages the strengths of the province’s oil and gas industry to push the limits of directional drilling into the aquifer of the Williston Sedimentary Basin. The first well was drilled in 2018 to a depth of 3,530 metres, a Saskatchewan record. With an additional five wells, the project constitutes the six deepest wells ever drilled in the province.
Geologist Ashley Drobot, head of business development at DEEP, notes the area may be one of the few in Saskatchewan suitable for geothermal electric power at scale. It offers permeable rock, a fluid medium to transfer energy to the surface and the depth to take advantage of the Earth’s temperature gradient — about 2.5 C hotter for every 100 metres deep.
Project partner Phoenix Technology Services is inserting L80 carbon steel pipe with diameters ranging from 9 5/8 inches to 13 3/8 inches into the sediment. The drilling regimen involved about 3,500 metres of vertical drilling and then an additional 3,000 metres of horizontal drilling. Drobot credits advances in bit design and increased accuracy in directional drilling that have allowed the horizontal pipe to remain within five metres of target when it might once have shifted by as many as 40 metres.
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