Geoffrey Mibei

Geoffrey Mibei serves as Researcher IV-Geoscience at the Center for Energy Conversion and Storage Systems, National Renewable Energy Laboratory (NREL), specializing in geothermal energy systems with expertise spanning subsurface characterization, reservoir modeling, and technoeconomic analysis.

He holds a PhD in Geology from the University of Iceland, providing the foundation for his advanced work in geothermal resource assessment and development.

Mibei's research centers on de-risking geothermal exploration through innovative methodologies including 3D play fairway analysis, thermal-hydraulic-mechanical-chemical modeling, and superhot Enhanced Geothermal System (EGS) advancement. His work bridges magma root system analysis with next-generation geothermal technologies to address critical challenges in resource identification and utilization.

Recent publications reveal a strong trend toward integrated risk assessment and economic optimization, with significant focus on magmatic environments, closed-loop systems, and flexible dispatch strategies for unconventional geothermal resources. His research consistently connects subsurface engineering with practical grid integration and end-use applications.

Professional recognition includes:

• Fellow, United Nations University-Geothermal Training Program

As part of NREL's Center for Energy Conversion and Storage Systems, Mibei collaborates extensively on national geothermal initiatives including the DEEPEN CRADA project, contributing to field applications at sites like Newberry Volcano and Wattenberg Area through advanced modeling and performance analysis.