Vinkovci Uncovers Massive Geothermal Potential: Studies and Documentation Underway
By: Robert Buluma
Vinkovci, Croatia – November 3, 2025
Recent research at the Vinkovci GT-1 well has confirmed significant geothermal potential in the area, positioning Vinkovci as the third Croatian city—after Velika Gorica and Osijek—to record reservoir temperatures above 100°C. These findings continue a successful series of exploratory activities led by the Croatian Hydrocarbons Agency (Agencija za ugljikovodike) as part of the project “Preparation and Exploration of Geothermal Potential in the Context of Centralized Heating.”
Energy of the Future Beneath Vinkovci
Mayor Josip Romić expressed his excitement on social media, stating:
"Research has confirmed what we believed from the start—Vinkovci and our region hold enormous geothermal potential. Beneath our feet lies the energy of the future, enabling us to reduce dependency on external factors and fluctuating energy prices. This is a path toward energy independence, economic resilience, and a sustainable future."
The city is moving quickly into the next phase, which includes preparing studies, developing project and technical documentation, and planning district heating routes. The goal is a modern heating system benefiting over 1,700 households, schools, kindergartens, and municipal institutions with clean, sustainable, and eco-friendly energy.
"Green transition for Vinkovci is no longer just a concept—it now has a solid foundation, bringing tangible, long-term benefits to our citizens, businesses, and agriculture," the mayor added, thanking the Hydrocarbons Agency for their cooperation.
Strategic Importance of Geothermal Energy
According to Marijan Krpan, CEO of the Hydrocarbons Agency:
"Positive geothermal research results in Vinkovci, following Velika Gorica and Osijek, demonstrate that Croatia possesses significant geothermal potential and the expertise to harness it. Geothermal energy is not only a stable and clean source but also a strategic resource that can enhance Croatia’s energy security. Our systematic approach and investment in research are delivering real results and laying the groundwork for future renewable energy projects."
The Vinkovci GT-1 well, drilled by Crosco – naftni servisi d.o.o., a member of INA Group, reached a depth of 2,700 meters, recording a maximum temperature of 131°C—a promising indicator for commercial geothermal heating applications.
Next Steps for Croatia’s Geothermal Development
Martina Tuschl, Director of the Geothermal Energy Sector at the Hydrocarbons Agency, highlighted that the research adheres to the highest technical standards. Following exploration at the remaining site in Zaprešić, additional wells are planned in confirmed high-potential locations to establish secure, long-term geothermal production and injection cycles.
The confirmed results are particularly significant for Vinkovci, opening avenues for the implementation of geothermal energy in heating systems and potential development of new economic activities tied to thermal energy use. The geothermal resource could also accelerate agricultural development in the Jarmine area, where the exploratory well is located.
Funding and Broader Impact
The project is financed through Croatia’s National Recovery and Resilience Plan (NPOO), which allocates €50.8 million for research across four sites: Velika Gorica, Osijek, Vinkovci, and Zaprešić. The overarching objectives are to increase energy independence, ensure supply security, reduce greenhouse gas emissions, and promote sustainable urban development.
Vinkovci’s geothermal milestone underscores Croatia’s growing capacity to leverage renewable energy, demonstrating a clear path toward sustainable cities and resilient communities.
Source: Vijesti
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