Browse > Article
http://dx.doi.org/10.9720/kseg.2016.3.325

Development of Methodology for Fracture Network Analysis in the Unsaturated Zone using MINC Approach in TOUGH2 Code  

Ha, Jaechul (Korea Radioactive Waste Agency (KORAD))
Cheong, Jae-yeol (Korea Radioactive Waste Agency (KORAD))
Kim, Soogin (Korea Radioactive Waste Agency (KORAD))
Yoon, Jeonghyoun (Korea Radioactive Waste Agency (KORAD))
Publication Information
The Journal of Engineering Geology / v.26, no.3, 2016 , pp. 325-330 More about this Journal
Abstract
The second phase of low- and intermediate-level waste (LILW) disposal facility is under planned on the sedimentary rock in unsaturated zone. In this study, we created two meshes which were a matrix continuum mesh and a fracture continuum mesh to carry out 2 dimensional numerical modeling for groundwater flow in the unsaturated zone containing fractures focused on the second phase of LILW disposal facility. Two continuum meshes were developed using MINC in meshmaker module of TOUGH2 code. A fracture continuum mesh was included the k-field distribution of the permeability derived from the Discrete Fractured Network (DFN) modeling. To apply the unsaturated zone for the modeling, the gridding steps to generate mesh were developed. Each step to generate a mesh consisted of definition of materials, setting the initial conditions and creating grids using MINC. The methodology development of meshes in this study will be applied for more precise modeling of groundwater flow and mass transport.
Keywords
double-porosity; fracture network; open fracture; TOUGH2 modeling; MINC;
Citations & Related Records
연도 인용수 순위
  • Reference
1 KRMC, 2008, Safety Assessment Report. (SAR)
2 Dario Hernandez1, Jonathon Clearwater1, John Burnell2, Peter Franz1, Lutfhie Azwar1, Andrew Marsh, 2015, Update on the Modeling of the Rotokawa Geothermal System: 2010–2014, Proceedings World Geothermal Congress 2015 Melbourne, Australia, 19-25 April.
3 George J. Moridis, Craig M. Freeman, 2014, The RealGas and RealGasH2O options of the TOUGH+ code for the simulation of coupled fluid and heat flow in tight/shale gas systems, Computers & Geosciences 65, 56-71.   DOI
4 Hinds, J., 2001, Development of Numerical Grids for UZ Flow and Transport Modeling, US DOE, 70p.
5 Pruess, K., Oldenburg, C., and Moridis, G., 1999, TOUGH2 user's guide, Version 2.0, LBNL-43134, Berkeley, CA.
6 Williams, M. D., Newell, D., Vermeul, V. R., Watson, T., and Reimus, P. W., 2010, Development of Models to Simulate Tracer Behavior in Enhanced Geothermal Systems, PNNL-19523, Richland, Washington.
7 Pruess, K., 1983, GMINC - A Mesh Generator for Flow Simulations in Fractured Reservoirs, Lawrence Berkeley Laboratory Report LBL-15227, Berkeley, CA.
8 Pruess, K., 1991, EOS7, An Equation-of-State Module for the TOUGH2 Simulator for Two-Phase Flow of Saline Water and Air, Lawrence Berkeley Laboratory Report LBL-31114, Berkeley, CA.
9 Shihao Wang, Yi Xiong, Philip Winterfeld, Keni Zhang and Yu-Shu Wu, 2014, Parallel Simulation of Thermal-Hydrological-Mechanic (THM) Processes in Geothermal Reservoirs, PROCEEDINGS, Thirty-Ninth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, 24-26 February.
10 Van Genuchten, 1980, A closed-form equation for predicting the hydraulic conductivity of unsaturated soils, Soil Sci. Soc. Am. J. 44.   DOI