Integrated 3-D finite element simulation of the edremit geothermal system

---

Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Jeoloji Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2016

Öğrenci: ALP YOĞURTÇUOĞLU

Danışman: NURKAN KARAHANOĞLU

Özet:

The Edremit Geothermal system consists of a shallow cold aquifer and a hot reservoir layer at depth. A 3-Dimensional Finite element model with 65596 nodes is used to simulate this system by an integrated algorithm in a 3 km by 3 km with 300 meters of depth study area consisting of currently operating geothermal field deep water wells. To determine the permeability values and hydraulic gradient values in the study area, a 2-Dimensional simulation was performed with 27664 nodes for the entire Edremit Basin, and its results are integrated into the 3-Dimensional model of the study area which was calibrated with 2 different evolutionary scenarios. The thermally calibrated 3Dimensional model was used in simulations for numerical applications including effects of hypothetical production rates which revealed temperature drops between 6 and 16º C that didn’t reach steady state; moreover the simulated model can reach pre-production state naturally in between 200 and 400 years. The modelled reservoir response of the study area to hypothetical reinjection scenario was found to be minimal, thus with the hypothetical production rates, the production is found to be unsustainable in the long term.