Joint inversion for mapping subsurface hydrologicalparameters

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Using electromagnetic (EM) and seismic travel time data and a least-square criteria, a two-dimensional joint inversion algorithm is under development to assess the feasibility of directly mapping subsurface hydrological properties in a crosswell setup. A simplified Archie's law combined with the time average equation relates the magnetic fields and seismic travel time to two hydrological parameters; rock porosity and pore fluid electrical conductivity. For simplicity, the hydrological parameter distributions are assumed to be two-dimensional. Preliminary results show that joint inversion does have better resolving power for the interpretation than using the EM method alone. Various inversion scenarios have been tested, ... continued below

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Tseng, Hung-Wen & Lee, Ki Ha March 7, 2001.

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Using electromagnetic (EM) and seismic travel time data and a least-square criteria, a two-dimensional joint inversion algorithm is under development to assess the feasibility of directly mapping subsurface hydrological properties in a crosswell setup. A simplified Archie's law combined with the time average equation relates the magnetic fields and seismic travel time to two hydrological parameters; rock porosity and pore fluid electrical conductivity. For simplicity, the hydrological parameter distributions are assumed to be two-dimensional. Preliminary results show that joint inversion does have better resolving power for the interpretation than using the EM method alone. Various inversion scenarios have been tested, and it has been found that alternately perturbing just one of the two parameters at each iteration gives the best data fit.

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  • SEG 2001 International Exposition and 71st.Annual Meeting, San Antonio, TX, September 9-14,2001

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  • Report No.: LBNL--47607
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 861396
  • Archival Resource Key: ark:/67531/metadc794185

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Office of Scientific & Technical Information Technical Reports

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  • March 7, 2001

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  • Dec. 19, 2015, 7:14 p.m.

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  • Sept. 21, 2017, 3:53 p.m.

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Tseng, Hung-Wen & Lee, Ki Ha. Joint inversion for mapping subsurface hydrologicalparameters, article, March 7, 2001; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc794185/: accessed January 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.