This interactive panel session addresses the pressing challenges associated with subsurface instrumentation used for evaluating geothermal reservoirs and managing drilling operations. This session will bring together industry experts, including geothermal operators, wireline engineers, technology developers and drilling service companies. Participants will explore the complexities of high temperature, high pressure, corrosive fluids, high vibration, and highly deviated wells, focusing on tailored solutions to meet specific operational demands and ensure accurate data collection. The panel will also engage in discussions about the essential measurements and the limiting factors for subsurface tools, such as environmental conditions, tool reliability, and data acquisition challenges. By fostering an open dialogue, this session aims to highlight innovative solutions and collaborative strategies that can enhance the efficiency and reliability of geothermal development and operations. We believe this panel will provide valuable insights and drive meaningful discussions within the geothermal energy community that advance technologies and improve operational practices.

• Moderator:  Andrew A. Wright, Sandia National Laboratories
• Panelist:  Joe Henfling, Thermochem
• Panelist:  Mehdi Hizem, SLB
• Panelist:  Paul Spielman, Ormat Technologies Inc.
• Panelist:  Tim Tarver, Exceed Geo Energy
• Panelist:  Matthew White, Hephae Energy Technology