Characterization and Modeling of Kızıldere Geothermal Field

Kizildere field is the first and only geothermal field of Turkey producing electricity from geothermal steam. Although it produces energy since 1984, it has some operational problems such as fluid disposal and decline in reservoir pressure. The best solution for these two operational problems seems to be the re-injection of produced fluid. A numerical modeling study was carried out to investigate the response of the field to different production/injection scenarios. While developing the model, permeability values from build-up tests and log-derived porosities were utilized. After getting a good match for the available 17 years production history, the model was applied to predict the response of the reservoir with several scenarios. Interpretation of build-up test data indicated a double porosity behavior for Kizildere Geothermal field. History match runs resulted with a requirement of a 200 m thick bottom aquifer for pressure support. Nine different scenarios were applied to observe the response of the field for different production / injection schemes. The performance prediction runs covered time period between January 1, 2001 and December 31, 2012. Performance prediction trial with existing wells without any re-injection resulted with a decline of 530 kPa in reservoir pressure in average. Among several re-injection trials, re-injection of fluid from the center of the field resulted with the highest-pressure support. 

Related Publications

• 1.      Yeltekin K., Parlaktuna M., and Akın, S.: “Modeling of Kızıldere Geothermal Reservoir, Turkey” Proceedings of the Twenty-Seventh Workshop on Geothermal Reservoir Engineering Stanford University, 26-28 Jan, 2002, Stanford, CA,  U.S.A.
• 2.      Akın, S., Yeltekin K. and Parlaktuna M.: “Numerical Modeling of Kizildere Geothermal Field, Turkey” European Geothermal Conference - 25-30 May, 2003, Szeged, Macaristan.