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

Yoğurtçuoğlu, Alp
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.


Numerical modeling of Edremit geothermal field
Günay, Emre; Karahanoğlu, Nurkan; Department of Geological Engineering (2012)
The purpose of this study is to examine the geothermal potential, sustainability, and reinjection possibility of Edremit geothermal field. In order to investigate this, a numerical model consisting of a hot and cold water aquifer system is established. A two dimensional cross sectional model is set to simulate this geothermal system. Different pressure and temperature values are applied to the nodes at the boundaries to perform a steady state calibration which minimizes the computed results and observed val...
Discrete fracture network modeling in Alaşehir geothermal field
Aydın, Hakkı; Akın, Serhat; Department of Petroleum and Natural Gas Engineering (2018)
Understanding of fractures network and fracture characteristic properties is essential for an effective geothermal reservoir management. Discrete Fracture Network (DFN) is one of the widely used approach to characterize fractured reservoirs. DFN modeling approach uses fracture geometry, conductivity and connectivity to create a fracture network. In this study, DFN modeling is used to characterize Alaşehir geothermal reservoir, which consists from heavily fractured marble and schist. Fracture parameters such...
A proxy model for determining reservoir pressure and temperature for geothermal wells
Aydin, Hakki; Akın, Serhat; Senturk, Erdinc (Elsevier BV, 2020-11-01)
Estimating reservoir pressure and temperature is one of the challenges of geothermal reservoir engineering. A new proxy model has been developed to estimate reservoir pressure and temperature using wellhead pressure, temperature and non-condensable gas (NCG) amount. An exhaustive set of wellhead data covering a range of possible wellhead pressure, temperature and NCG data is used in a calibrated wellbore simulator, which is then used to create a knowledgebase to train an artificial neural network (ANN) mode...
Assessment of low temperature geothermal resources
Arkan, Serkan; Parlaktuna, Mahmut; Department of Petroleum and Natural Gas Engineering (2003)
One of the most applicable methods of low-temperature geothermal resource assessment is volumetric method. While applying volumetric method, the values of uncertain parameters should be determined. An add-in software program to Microsoft EXCEL, @RISK, is used as a tool to define the uncertainties of the parameters in volumetric equation. In this study, Monte Carlo simulation technique is used as the probabilistic approach for the assessment of lowtemperature Balçova-Narlidere geothermal field. Although Balç...
Carbon dioxide injection field pilot in umurlu geothermal field, Turkey
Yücetaş, İsmet; Ergiçay, Nevzat; Akın, Serhat (null; 2018-01-01)
The Umurlu geothermal reservoir located in Buyuk Menderes Graben, Turkey initially contained around 2% by weight CO_2 dissolved in geothermal reservoir fluid. The produced CO_2 rate declined over one year of production time due to dilution of reservoir gas by degassed injectate. Since CO_2 has a considerable role on Umurlu reservoir performance and energy production, produced non-condensable gas (NCG) has been injected simultaneously with colder degassed injectate from an injection well for the last two mon...
Citation Formats
A. Yoğurtçuoğlu, “Integrated 3-D finite element simulation of the Edremit geothermal system,” M.S. - Master of Science, Middle East Technical University, 2016.