English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/216415
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:

Title

Comparison of numerical codes for coupled thermo-hydro-mechanical simulations of fractured media

AuthorsZareidarmiyan, Ahmad; Salarirad, Hossein; Vilarrasa, Víctor ; Kim, Kwang-Il; Lee, Jaewon; Min, Ki-Bok
KeywordsCoupled thermo-hydro-mechanical (THM) analysis
Improved oil recovery (IOR)
Naturally fractured reservoir (NFR)
CODE_BRIGHTTOUGH-UDEC
Issue Date3-Jun-2020
PublisherElsevier
CitationJournal of Rock Mechanics and Geotechnical Engineering (2020)
AbstractGeo-energy and geo-engineering applications, such as improved oil recovery (IOR), geologic carbon storage, and enhanced geothermal systems (EGSs), involve coupled thermo-hydro-mechanical (THM) processes that result from fluid injection and production. In some cases, reservoirs are highly fractured and the geomechanical response is controlled by fractures. Therefore, fractures should explicitly be included into numerical models to realistically simulate the THM responses of the subsurface. In this study, we perform coupled THM numerical simulations of water injection into naturally fractured reservoirs (NFRs) using CODE_BRIGHT and TOUGH-UDEC codes. CODE_BRIGHT is a finite element method (FEM) code that performs fully coupled THM analysis in geological media and TOUGH-UDEC sequentially solves coupled THM processes by combining a finite volume method (FVM) code that solves non-isothermal multiphase flow (TOUGH2) with a distinct element method (DEM) code that solves the mechanical problem (UDEC). First, we validate the two codes against a semi-analytical solution for water injection into a single deformable fracture considering variable permeability based on the cubic law. Then, we compare simulation results of the two codes in an idealized conceptual model that includes one horizontal fracture and in a more realistic model with multiple fractures. Each code models fractures differently. UDEC calculates fracture deformation from the fracture normal and shear stiffnesses, while CODE_BRIGHT treats fractures as equivalent porous media and uses the equivalent Young's modulus and Poisson's ratio of the fracture. Finally, we obtain comparable results of pressure, temperature, stress and displacement distributions and evolutions for the single horizontal fracture model. Despite some similarities, the two codes provide increasingly different results as model complexity increases. These differences highlight the challenging task of accurately modeling coupled THM processes in fractured media given their high nonlinearity.
Publisher version (URL)https://doi.org/10.1016/j.jrmge.2019.12.016
URIhttp://hdl.handle.net/10261/216415
DOIhttp://dx.doi.org/10.1016/j.jrmge.2019.12.016
Appears in Collections:(IDAEA) Artículos
Files in This Item:
File Description SizeFormat 
Comparison of numerical codes for coupled thermo-hydro-mechanical simulations of fractured media.pdfArtículo principal4,16 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.