CO2 Decline in Alasehir Geothermal Reservoir

Abstract

Reinjection of gas free of brine into the peripheries of the geothermal reservoir may gradually decline non-condensable gas (NCG) concentration in the reservoir fluid during the operation of geothermal power plants. As a result, gradually decreasing gas emissions can be observed. In this study, we use separator data to calculate produced CO2 amount in the reservoir fluid. The data used is from Alaşehir geothermal area that is the current target for geothermal production in Turkey. Data obtained from 7 wells covering two years of production showed that reinjection of gas free brine into the peripheries of the geothermal reservoir declined CO2 concentration in the reservoir fluid. It has been also observed that commissioning of neighbor power plants have a significant effect on the produced CO2 amount.