Reservoir Modelling

Development of reservoir models to better understand the dynamics of, and factors controlling, geothermal resources from fracture to field to regional scale; and establishment of a combined fluid flow-rock mechanics model of the TVZ.

Project Leader: Sophie Pearson

Research Collaborators: IRL, University of Auckland

Task 1: Shallow Systems

  • Tauranga low enthalpy model
  • Models of shallow regions in TVZ-like systems to study hot spring behaviour
  • Numerical models created of Whitford and Tauranga geothermal fields
  • Low-enthalpy models of low-temperature geothermal areas (e.g. Matamata) created to quantify potential and sustainability

Task 2: Deep Reservoirs

  • 3D heat and mass transfer computer model of the Taupo-Reporoa geothermal system down to 6 km
  • Coupled rock-mechanics and fluid flow numerical model created to simulate the formation and deep structure of TVZ-like geothermal fields from source to surface
  • Fluid-flow and rock mechanics model developed to enable design of hydro-fracturing/ cold-water injection
  • TVZ regional TOUGH2 model
  • General equations of state
  • TOUGH2-FEHM simulations generated to predict fracture development combined with TOUGH-REACT or CHEM-TOUGH experiments to determine complex interactions between fracture flow and chemical reactions