Lumped and distributed parameter models of the Mosfellssveit geothermal field, SW-Iceland

Abstract

The main part of this report is addressed to the groundwater flow modelling of the Mosfellssveit geothermal field. First, a simple lumped model of the field was made in order to match measured and calculated pressure response with the present production rates on a monthly basis from 1971 to 1989. After calibration of the model, future water level changes with different monthly and yearly production rates were estimated in order to predict pressure response of the field until the year 2000. The second part consisted of making a distributed groundwater flow model of the field in order to determine the distribution of the main hydraulic parameters. The main problem in the behaviour of the field is the constant lowering of the water level due to high production. During exploitation of the field, no significant changes in temperature or chemical content have been observed.