Lumped-parameter models for low-temperature geothermal fields and their application

Sarak H., Onur M., Satman A.

GEOTHERMICS, vol.34, no.6, pp.728-755, 2005 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 34 Issue: 6
  • Publication Date: 2005
  • Doi Number: 10.1016/j.geothermics.2005.09.001
  • Journal Name: GEOTHERMICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.728-755
  • Istanbul Technical University Affiliated: No


The behavior of low-ternperature geothermal reservoirs under exploitation is simulated using analytical lurnped-parameter models. These models consider the effects of fluid production and reinjection, as well as natural recharge, on the pressures (or water levels) of low-temperature, liquid-dominated geothermal systems. The cornputed responses for constant production/injection flow rates are given in the form of analytical expressions. Variable flow rate cases are modeled, based on the Duharnel's principle. Reservoir parameters are obtained by applying a weighted nonlinear least-squares estimation technique in which measured field data are history matched to the corresponding model response. By using history-matched models, the future performance of the reservoir can be predicted for different production/injection scenarios in order to optimize the management of a given geothermal system.