The GNG team convened a supercritical symposium in Rotorua on Wednesday 30th November 2022. This was part of the International Association for the Properties of Water and Steam (IAPWS) Annual Meetings and Workshops.

The programme is available here, and you can access the presentation material using the links below:

• Symposium Introduction (David Addison)
• New Zealand’s Energy and Geothermal Future:Opportunities and Challenges (Vince Hawksworth)
• Introduction to Supercritical Geothermal (Brian Carey)

Session 1: Volcanism in the Taupō Volcanic Zone & Geophysics

• Drivers of geothermal systems in NZ (Geoff Kilgour)
• GNG – Exploring supercritical resources in the TVZ (Craig Miller)
• Imaging volcano-geothermal systems in the TVZ with magnetotellurics (Ted Bertrand)
• Seismic imaging (Stephen Bannister)

Session 2: Geochemistry

• GNS Experimental geochemistry laboratory and basalt-fluid Interactions at subcritical and supercritical conditions: an experimental study (Bruce Mountain)
• Quartz solubility in supercritical water (Peter Rendel)
• Geothermal steam sampling and online analysis of trace sodium and silica and interference removal via gas transfer membranes (David Addison)

Session 3: Modelling

• Learnings from international collaboration and an approach to a national resource inventory (Chris Bromley)
• Modelling to assess national potential (John Burnell)
• Modelling the fluid and heat flows below the TVZ: the challenges of fluid properties (Warwick Kissling)
• What might a New Zealand TVZ supercritical well produce? (Julius Rivera)
• HX Solution for high-enthalpy wells (Peter Rop)
• Geothermal Emissions Reduction (Ian Richardson)