| Title | Geothermal Exploration Survey of Sorgun Geothermal Field (Yozgat-Turkiye) |
|---|---|
| Authors | Sakir Simsek, Elif Yilmaz, Kemal Koc, Ozen Turker, Huseyin Karakus, Nilgun Bakir, Abdullah Gulgor, Ziynet Nur Simsek, Gokhan Bulus, Ersin Girbalar, Ilker Bektas, Tuygun Savaci, Hüseyin Oguz |
| Year | 2010 |
| Conference | World Geothermal Congress |
| Keywords | Geothermal exploration, geology, hydrogeology, Sorgun, Yozgat |
| Abstract | Sorgun geothermal field is located in the east of Sorgun district of Yozgat province. This study is focused on the evaluation of geological, hydrogeological, hydro geochemical, and geophysical studies, and drilling and well performance tests. Previous investigations and exploration wells for productoin of thermal waters and discharging water from coal mines were carried out by MTA General Directorate in this field. Hacettepe University- ORME Geothermal Inc. carried out a joint project on behalf of Yozgat Governorship-Governing of Sorgun District in 2004. Subsequently, Hacettepe University performed consulting services between 2005-2008 related to geological, hydrogeological, and drilling studies and well tests for the SG-1, SG-2, SG-3, SGR-1 and SG-4 wells. Lastly, reports of the well tests that were conducted by General Directorate of Iller Bankasi on behalf of Sorgun Municipality were evaluated. Production and reinjection wells with bottom-hole temperatures ranging from 69 to 80oC were drilled to depths of 104-445 m to obtain thermal water from the field. A reinjection well was drilled at the SGR-1 location in the field. Reservoir rocks were hosted by Paleocene granodiorites, whereas Eocene deposits constitute the caprock of the field. Thermal waters are of meteoric origin and classified as NaCl-SO4 waters. The Sorgun geothermal field is suitable for integrated utilizations of thermal waters, specifically central heating, greenhouse heating, thermal tourism and balneology. Geothermal wells provided thermal waters for 1000 residences, a 10,000 m2 greenhouse and the hot water supply to the thermal resorts. |