en.Wedoany.com Reported - Eavor Technologies' flagship geothermal project in Geretsried, Germany, has begun supplying power to the grid, but engineering challenges encountered during drilling have led the company to revise its timeline and plan to seek new partners and investors to advance its next-generation geothermal system. The project, the company's first closed-loop geothermal system, has currently completed only the first of four planned loops.
The company began drilling in July 2023 and received €91.6 million in funding from the EU Innovation Fund. Upon full completion, the project is planned to supply 8.2 MW of electricity to the grid or 64 MW of district heating to nearby towns. The current system generates approximately 0.5 MW of electricity, validating the expected performance of a loop of this size. During drilling, Eavor replaced its drilling fluid system to address instability in the initial boreholes and the risk of pipe sticking. By adjusting technology and equipment, the company reduced average drilling time by over 70% from the first four lateral well pairs to the final batch. To address quality issues with the mother bore cement casing, the team switched to a single-rig operation, which doubled the time and cost for the first loop. The company originally planned to drill 12 lateral well pairs for the first loop but ultimately drilled only six, in order to adopt a new cement design for the next loop.
Demand for clean, domestic energy is rising in the geothermal industry, but traditional geothermal power generation is limited by natural steam and hot water reservoirs. Eavor's closed-loop system circulates water underground to collect heat by drilling vertical wells and multiple horizontal well pairs at depth, making it applicable to a wider range of regions. This technology avoids the risks of induced seismicity and water resource pressure that enhanced geothermal systems may pose, but faces the challenge of longer and more complex drilling processes. Fervo Energy in the U.S. is building a 500 MW enhanced geothermal project in Utah, expected to begin generating electricity this fall. For other closed-loop projects, XGS Energy, GreenFire Energy, and Vero Geothermal are also advancing closed-loop initiatives in California and New Mexico. Emily Pope, a geologist and senior fellow at the Center for Climate and Solutions, who previously worked on the Iceland Deep Drilling Project, noted that setbacks for pioneering projects like Eavor's are expected, and geothermal developers must learn by doing.
Matt Toews, co-founder and Chief Technology and Operations Officer of Eavor, told Canary Media that despite the challenges, the system has proven capable of extracting heat as required, and the company has mastered the cost and technology to build and operate loops at a commercial scale. He added that the overall plan remains unchanged, with the goal of drilling deeper and hotter formations by moving down the learning curve. Pope hopes Eavor and other companies will continue to share their experiences, helping the entire industry understand the technology development phase and move toward commercial-scale products.
