Simulations of Brady's-Type Fault Undergoing CO2 Push-Pull: Pressure-Transient and Sensitivity Analysis

Description

Input and output files used for fault characterization through numerical simulation using iTOUGH2. The synthetic data for the push period are generated by running a forward simulation (input parameters are provided in iTOUGH2 Brady GF6 Input Parameters.txt [InvExt6i.txt]). In general, the permeability of the fault gouge, damage zone, and matrix are assumed to be unknown. The input and output files are for the inversion scenario where only pressure transients are available at the monitoring well located 200 m above the injection well and only the fault gouge permeability is estimated. The input files are named InvExt6i, INPUT.tpl, FOFT.ins, CO2TAB, and the output files are InvExt6i.out, pest.fof, and pest.sav (names below are display names). The table graphic in the data files below summarizes the inversion results, and indicates the fault gouge permeability can be estimated even if imperfect guesses are used for matrix and damage zone permeabilities, and permeability anisotropy is not taken into account.

Resources

Name Format Description Link
10 Description of the files and workflow related to the data files below. https://gdr.openei.org/files/1019/Description_r2.docx
0 iTOUGH2 output file containing results of inversion https://gdr.openei.org/files/1019/InvExt6i.out
0 Parameter estimation (PEST) output file https://gdr.openei.org/files/1019/pest.fof
0 TOUGH2 input file. Brady's Exp. 6, 2D, NaClv% 0.0; CO2 gsat 0.0% IC hydrostatic https://gdr.openei.org/files/1019/INPUT.tpl
0 TOUGH2 Initial Conditions (INCON) file https://gdr.openei.org/files/1019/pest.sav
22 Graphic summarizing the inversion results https://gdr.openei.org/files/1019/Table_graphic.JPG
47 Table of CO2 PVT properties read by TOUGH2 https://gdr.openei.org/files/1019/CO2TAB.txt
0 Website including short courses, user forum, documentation, and availability and licensing for iTOUGH2 and TOUGH2 https://itough2.lbl.gov/
47 iTOUGH2 input file. Brady's Experiment 6 inversion, 60 deg fault, 2D, matrix, NaClv% 0.0; CO2 gsat 0.0% IC hydrostatic https://gdr.openei.org/files/1019/BradyGF6_Exp_06_injection.txt
0 iTOUGH2 input file containing a list of the times (s) at which the model results for pressure change at the observation point (fault gouge 200 m above the injection well) are compared to synthetic data. Each time has a text label that corresponds to an entry in the PEST Observation Data section of the input file InvExt6i where the synthetic data for pressure change are given. https://gdr.openei.org/files/1019/FOFT.ins
47 iTOUGH2 input file used to perform parameter estimatio. Provides synthetic data for pressure change. https://gdr.openei.org/files/1019/InvExt6i.txt

Tags

  • pressure-transient-testing
  • itough2
  • egs
  • tough2
  • push-pull
  • inverse-modeling
  • incon
  • gf6
  • sensitivity-analysis
  • carbon-dioxide
  • faulting
  • co2
  • parameter-estimation
  • pest
  • fracture
  • stimulation
  • characterization
  • fault
  • fault-modeling
  • brady
  • geothermal
  • energy

Topics

Categories