Sorgun (Yozgat) Hidrotermal Sisteminin Modellenmesi

Abstract

Sorgun geothermal field is an important and an example area for our country in terms of integrated use of spa, residential and greenhouse heating with production reinjection system. A total 11 geothermal wells have been drilled ranging from 104 m to 444 m depth in the field. Reservoir temperatures were measured between 75-85.4 °C in the borehole. Reservoir rock is fractured and faulted zones of granodiorites which is accepted as the Paleocene age and cap rock is Eocene sedimentary rocks in the field.Geothermal waters is NaCl-type and have long-term groundwater transition system with a high chloride content and electrical conductivity. According to the environmental isotope analysis, thermal waters are meteoric origin and recharged from a higher elevation compared to the shallow cold waters. Low of Oxygen-18 increasing which observed common in geothermal waters, in Sorgun geothermal waters and the presence of tritium indicate that mixture of deep convection geothermal fluid with relatively shallow circulation cold water.