Reassessment of the Kizildere Geothermal Reservoir

Abstract

This study aims to reassess the different aspects of the Kizildere field after 15 years of exploitation not only to provide better understanding of the geothermal reservoir that, in our opinion, has been underexploited, but also to set conditions for better reservoir management. Rock and fluid properties of Kizildere geothermal reservoir were studied through reassessment of well logs, well tests, geochemistry of geothermal fluids and pressure and temperature surveys. Production performance of the field was also examined. Based on the production history and on geological and geophysical work the water in place, recharge and heat balance of the Kizildere geothermal system were estimated. Moreover, reinjection experiments conducted in the past were reassessed. This work, coupled with modeling studies helped to explain the physical changes such as two phase formation that have occurred during the exploitation of the field over the last 14 years. The possible discovery of a deeper and hotter reservoir provides new horizons for the field in the future. New reservoir management policy and reinjection alternatives are proposed. The economics of the field and power plant is also evaluated, and the results are reported.