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

Abstract

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.

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Additional Info

DOE Project Name: Push-pull well testing using CO2 with active source geophysical monitoring
DOE Project Number: EE0001554
DOE Project Lead: Sean Porse
DOI: 10.15121/1452750
Last Updated: over a year ago
Mar
2018
Data from March, 2018
Submitted Mar 9, 2018

Contact

Lawrence Berkeley National Laboratory


510.486.7419

Status

Publicly accessible License 

Authors

Yoojin Jung
Lawrence Berkeley National Laboratory
Christine Doughty
Lawrence Berkeley National Laboratory

Keywords

geothermal, energy, EGS, CO2, carbon dioxide, push-pull, pressure-transient testing, iTOUGH2, sensitivity analysis, inverse modeling, parameter estimation, INCON, PEST, TOUGH2, fault modeling, GF6, Brady, faulting, fault, fracture, characterization, stimulation

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