Discrete fracture network modeling in Alaşehir geothermal field

Download
index.pdf
2018
Aydın, Hakkı
Show full item record
373
views
209
downloads
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 as fracture permeability, aperture, intensity and fracture radius are conditioned for model calibration. Most of the required fracture parameters are retrieved from different data sources. Stochastic correlations related with known parameters are used to estimate unavailable parameters. The dynamic model results are verified with pressure transient buildup tests conducted in the field. Upscaled fracture properties are in accord with well test analysis and tracer test results. DFN model shows that all wells are interconnected by strong fractures network. Fractures network is validated with a tracer test and reservoir monitoring in the field.
Geothermal engineering., Geothermal resources., Geology, Stratigraphic., Faults (Geology).
http://etd.lib.metu.edu.tr/upload/12622256/index.pdf
https://hdl.handle.net/11511/27478
Graduate School of Natural and Applied Sciences, Thesis

Suggestions

Discrete fracture network modeling of Alaşehir geothermal field
Aydın, Hakkı; Akın, Serhat (null; 2019-02-13)
Understanding of fracture 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 usesfracture geometry, conductivity and connectivity to create a fracture network. In this study, DFN modeling is used to characterize Alaşehirgeothermal reservoir, which consists from heavily fractured marble and schist. Fracture parameters such as ...
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...
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...
Integrated 3-D finite element simulation of the Edremit geothermal system
Yoğurtçuoğlu, Alp; Karahanoğlu, Nurkan; Department of Geological Engineering (2016)
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, a...
Nonlinear shear mass participation factor (r(d)) for cyclic shear stress ratio evaluation
Çetin, Kemal Önder (Elsevier BV, 2004-02-01)
Most methods for assessment of in situ seismic soil liquefaction potential require evaluation of the earthquake-induced cyclic shear stress ratio (CSR). Estimates of the in situ CSR can be developed directly, using dynamic response analyses, but it is common in 'simplified' analysis methods to develop estimates of the in situ CSR using empirical relationships. Unfortunately, the most widely used existing empirical relationships are based on limited response analyses and do not take full advantage of current...
Citation Formats
H. Aydın, “Discrete fracture network modeling in Alaşehir geothermal field,” M.S. - Master of Science, Middle East Technical University, 2018.
METU IIS - Integrated Information Service open@metu.edu.tr