The Application of geologically-constrained 3D heat conduction models to geothermal exploration

Craig O'Neill, Cara Danis, Raquibul Hassan, Steve Quinnette, Louis Moresi

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

Abstract

Renewed interest in the thermal structure of the upper crust has led to the development of a new generation of tools capable of modelling the 3D heat conduction problem, incorporating the complex geology and physical properties of the crust. The numerical and resolution requirements of such models has necessitated a high performance performance computing approach, utilising massively parallel machine architecture to obtain ~10m resolution of models over a basin-scale. Here we demonstrate the application of the StGermain/Underworld geodynamic modelling framework to basin-scale geodynamic problems. The default code has been modified to incorporate importing of geometrically complex geological units, each with its own conductivity and heat production, and temperaturedependent thermal conductivity. Thermal models demonstrate the importance of incorporating 2 & 3D geometries, with large lateral variations in the subsurface temperature field and heat flow as a result of the heterogenous basin architecture. We explore the effect of lithological resolution, and identify a critical level of detail required to adequately represent basin-scale temperature variations. The regional temperature field play a dominant role in determining tenement-level subsurface temperatures, and highlight the importance of understanding regional temperature variations in geothermal exploration.
Original languageEnglish
Title of host publicationASEG Extended Abstracts 2010
Subtitle of host publicationfuture discoveries are in our hands
Place of PublicationAustralia
PublisherCSIRO Publishing
Pages1-3
Number of pages3
Volume2010
DOIs
Publication statusPublished - 2010
EventInternational Geophysical Conference and Exhibition (21st : 2010) - Sydney
Duration: 22 Aug 201026 Aug 2010

Conference

ConferenceInternational Geophysical Conference and Exhibition (21st : 2010)
CitySydney
Period22/08/1026/08/10

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