As part of the regular Focus on Geothermal Webinar series – a partnership of Enerchange and ThinkGeoEnergy, we are proud to host Gabrijel Grubac of Mazama Energy for a webinar on “Enhanced Geothermal System >300 °C: The Newberry Volcano path to SuperHot rock geothermal.” Further details are as follows:
Date: 16 January 2026
Time: 14:00 CET / 08:00 ET
Registration: Click here to register
Speaker: Gabrijel Grubac, Senior Completions Engineer, Mazama Energy
This talk will provide insights into the world’s first successful enhanced geothermal system (EGS) with temperatures exceeding 300°C, particularly on the connection and circulation achievements through stimulation on the Newberry Volcano in Oregon, USA.
From the recompletion and stimulation of the injector well to the drilling and completion of the producer well, the presentation will bring a high-level perspective on the progressive dynamics that enabled connecting and circulating in this enhanced geothermal system and in doing so, opening the door to the next steps in making SuperHot Rock EGS a reality.
Gabrijel Grubac is currently a Senior Completions Engineer at Mazama Energy, where his work is focused on Enhanced Geothermal Systems (EGS) and SuperHot rock geothermal development.
He is a completions and stimulation engineer with over a decade of experience in the global energy industry, working across the United States, Europe, and the Middle East in onshore and offshore assets. His current focus lies in enhancing the completion of the future for SuperHot rock and help build systems that aim to achieve uniformity in stimulation and heat harvesting to ultimately enhance output and economics of projects.
Gabrijel is also actively engaged in geothermal and energy education through SPE, supporting technical knowledge transfer and workforce development for next-generation geothermal systems and beyond.
