Permeability Changes During the Evolution of a Geothermal Field Due to the Dissolution and Precipitation of Quartz |
| |
Authors: | White S. P. Mroczek E. K. |
| |
Affiliation: | (1) N.Z. Institute for Industrial Research and Development, P.O. Box 31-310, Lower Hutt, New Zealand;(2) Wairakei Research Centre, Institute of Geological Nuclear Sciences, P.O. Box 2000, Taupo, New Zealand |
| |
Abstract: | The changes in permeability and porosity associated with quartz deposition in an evolving geothermal reservoir are investigated. We review the processes associated with permeability changes in a geothermal reservoir and also review recent work on quartz solubility and deposition rates. Porosity and permeability changes are calculated for two reservoir models. The first is a generic model of a Taupo Volcanic Zone geothermal reservoir and the second is based on the model of the deep circulation system at Kakkonda published by Hanano. We find that when a reservoir experiences BPD conditions during part of its lifetime the lower reservoir becomes impermeable and a hydrothermal circulation system is only present in the upper part of the reservoir. |
| |
Keywords: | super-critical geothermal reservoir modelling quartz precipitation |
本文献已被 SpringerLink 等数据库收录! |