PFLOTRAN-SIP: A PFLOTRAN Module for Simulating Spectral-Induced Polarization of Electrical Impedance Data
- Baylor Univ., Waco, TX (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Baylor Univ., Waco, TX (United States)
Spectral induced polarization (SIP) is a non-intrusive geophysical method that collects chargeability information (the ability of a material to retain charge) in the time domain or its phase shift in the frequency domain. Although SIP is a temporal method, it cannot measure the dynamics of flow and solute/species transport in the subsurface over long times (i.e., 10–100 s of years). Data collected with the SIP technique need to be coupled with fluid flow and reactive-transport models in order to capture long-term dynamics. To address this challenge, PFLOTRAN-SIP was built to couple SIP data to fluid flow and solute transport processes. Specifically, this framework couples the subsurface flow and transport simulator PFLOTRAN and geoelectrical simulator E4D without sacrificing computational performance. PFLOTRAN solves the coupled flow and solute-transport process models in order to estimate solute concentrations, which were used in Archie’s model to compute bulk electrical conductivities at near-zero frequency. These bulk electrical conductivities were modified while using the Cole–Cole model to account for frequency dependence. Using the estimated frequency-dependent bulk conductivities, E4D simulated the real and complex electrical potential signals for selected frequencies for SIP. These frequency-dependent bulk conductivities contain information that is relevant to geochemical changes in the system. This study demonstrated that the PFLOTRAN-SIP framework is able to detect the presence of a tracer in the subsurface. SIP offers a significant benefit over ERT in the form of greater information content. It provided multiple datasets at different frequencies that better constrained the tracer distribution in the subsurface. Consequently, this framework allows for practitioners of environmental hydrogeophysics and biogeophysics to monitor the subsurface with improved resolution.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Fossil Energy (FE); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- 89233218CNA000001; AC05-76RL01830
- OSTI ID:
- 1756019
- Alternate ID(s):
- OSTI ID: 1764198
- Report Number(s):
- LA-UR--19-28828; PNNL-SA--157259
- Journal Information:
- Energies (Basel), Journal Name: Energies (Basel) Journal Issue: 24 Vol. 13; ISSN 1996-1073
- Publisher:
- MDPI AGCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
Monte Carlo simulation
electrical resistivity tomography
inversion spectral induced polarization (SIP)
subsurface geoelectrical signatures
hydrogeophysics
multi-physics
porous media flow
forecasting
numerical modeling
observation worth
parameter estimation
uncertainty analysis
Monte Carlo simulation
electrical resistivity tomography
inversion spectral induced polarization (SIP)
subsurface geoelectrical signatures
hydrogeophysics
multi-physics
porous media flow
forecasting
numerical modeling
observation worth
parameter estimation
uncertainty analysis