ITOUGH2 sample problems
This report contains a collection of ITOUGH2 sample problems. It complements the ITOUGH2 User`s Guide [Finsterle, 1997a], and the ITOUGH2 Command Reference [Finsterle, 1997b]. ITOUGH2 is a program for parameter estimation, sensitivity analysis, and uncertainty propagation analysis. It is based on the TOUGH2 simulator for non-isothermal multiphase flow in fractured and porous media [Preuss, 1987, 1991a]. The report ITOUGH2 User`s Guide [Finsterle, 1997a] describes the inverse modeling framework and provides the theoretical background. The report ITOUGH2 Command Reference [Finsterle, 1997b] contains the syntax of all ITOUGH2 commands. This report describes a variety of sample problems solved by ITOUGH2. Table 1.1 contains a short description of the seven sample problems discussed in this report. The TOUGH2 equation-of-state (EOS) module that needs to be linked to ITOUGH2 is also indicated. Each sample problem focuses on a few selected issues shown in Table 1.2. ITOUGH2 input features and the usage of program options are described. Furthermore, interpretations of selected inverse modeling results are given. Problem 1 is a multipart tutorial, describing basic ITOUGH2 input files for the main ITOUGH2 application modes; no interpretation of results is given. Problem 2 focuses on non-uniqueness, residual analysis, and correlation structure. Problem 3 illustrates a variety of parameter and observation types, and describes parameter selection strategies. Problem 4 compares the performance of minimization algorithms and discusses model identification. Problem 5 explains how to set up a combined inversion of steady-state and transient data. Problem 6 provides a detailed residual and error analysis. Finally, Problem 7 illustrates how the estimation of model-related parameters may help compensate for errors in that model.
- Research Organization:
- Lawrence Berkeley National Lab., Earth Sciences Div., CA (United States)
- Sponsoring Organization:
- USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States); USDOE Office of Civilian Radioactive Waste Management, Washington, DC (United States); Swiss National Cooperative for the Storage of Nuclear Waste, Baden (Switzerland)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 334371
- Report Number(s):
- LBNL--40042; ON: DE99002435
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
15 GEOTHERMAL ENERGY
58 GEOSCIENCES
99 GENERAL AND MISCELLANEOUS
COMPUTER PROGRAM DOCUMENTATION
DATA COVARIANCES
FRACTURED RESERVOIRS
GEOTHERMAL SYSTEMS
Geothermal Legacy
HYDRAULIC CONDUCTIVITY
I CODES
MULTIPHASE FLOW
PARAMETRIC ANALYSIS
POROUS MATERIALS
RADIOACTIVE WASTE DISPOSAL
SENSITIVITY ANALYSIS