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Keywords: conductivity structure
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Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3584660
... Active-source and natural-field EM data differ in their sensitivity to subsurface conductivity structures. Generally, the former offer higher spatial resolution and have a greater sensitivity to near-surface conductivities. The latter are more sensitive to broader structures and, for MT data...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426481
.... Such an assumption is not valid for highly conductive material like saltwater. There is a need to model the 3D response of conductivity structures expected in a coastal setting to understand what a portable instrument is capable of resolving. We present example results from a 3D solver that illustrate the difference...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215437
... across a conductive body demonstrate how the host conductivity and the location of the base station affect the conductor response. The strong sensitivity of the data to the conductivity structure at the base station results in inversion results being quite sensitive to the inversion start models used...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2994813
... parts of the meshless approximation. To validate the newly developed algorithm we present an example calculation including topography, where we recover an unknown conductivity structure with the help of measured apparent resistivities and phases. Presentation Date: Monday, October 15, 2018 Start Time...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5853509
.... We first remove the noise using independent component analysis (ICA) prior to the inversion. The flux data is also up-sampled prior to the analysis to match the sampling rate with SP. We compare the estimated hydraulic conductivity structure with those by the other method, such as hydraulic...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-1488
... of the simulation. Results are illustrated with a couple of simulations that demonstrate the capabilities of our method as well as the challenges that this different perspective offers. reservoir simulation conductivity structure conductivity seg denver 2014 durlofsky tensor conductivity model...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2013 SEG Annual Meeting, September 22–27, 2013
Paper Number: SEG-2013-1241
... I. Summary Anisotropy in the conductivity structure of sea ice results from the preferential alignment of brine channels in the ice crystal matrix. Attenuation of radar waves traveling within the ice depends on the polarization of the electric field with respect to the orientation...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-0655
... inversion result upstream oil & gas magnetic field conductivity background conductivity conductivity structure oldenburg inversion mt data seg seg denver 2010 british columbia information reservoir characterization grid algorithm ztem data ubc-geophysical inversion facility...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-1729
... structures is illustrated in Figure 2. The ZTEM system shows a strong Tzx response at the contact of the two quarter-spaces and the 2D inversion resolves the conductivity contrast well. apparent conductivity metals & mining conductivity structure grid modelled ztem response ztem response...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-1950
... reference model time step algorithm equation knowledge electrical impedance tomography experiment information artificial intelligence model parameter application conductivity model log analysis infiltration reservoir characterization conductivity structure inversion electrical...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-0564
... frequency and provide information about the 3D conductivity structure of the Earth. In this paperwe show how these transfer functions can be modelled. Thisis the crucial step towards any interpretation or inversion. The inversion of Z-TEM data is computationally similar to inversion of MT data. This ability...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2002 SEG Annual Meeting, October 6–11, 2002
Paper Number: SEG-2002-0488
... Summary The paper deals with the study related to electrical conductivity structure in the geothermal province of Bakreswar. Audio magnetotelluric (AMT) surveys have been carried out with a very close interval to identify the geological features related to the geothermal springs...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 1998 SEG Annual Meeting, September 13–18, 1998
Paper Number: SEG-1998-0751
... conductivity structure distortion investigation falconbridge exploration ltd geophysics On The Detection of Ni-Cu Ore Hosting Structures in the Sudbury Igneous Complex Using The Magnetotelluric Method K.M Stevens* , Falconbridge Exploration Ltd. and G. McNeice, Phoenix Geophysics. Summary A total of 16...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 1996 SEG Annual Meeting, November 10–15, 1996
Paper Number: SEG-1996-1275
... ABSTRACT No preview is available for this paper. conductivity coupling removal frequency electric field inversion conductivity structure coupling exploration upstream oil & gas geophysics poster presentation 10 dipole algorithm average conductivity removal scheme em...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 1996 SEG Annual Meeting, November 10–15, 1996
Paper Number: SEG-1996-0257
... ABSTRACT No preview is available for this paper. conductivity reservoir characterization csamt inversion csamt data exploration objective function inversion conductivity structure algorithm mt algorithm resistivity misfit upstream oil & gas frequency apparent...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 1996 SEG Annual Meeting, November 10–15, 1996
Paper Number: SEG-1996-0285
... ABSTRACT No preview is available for this paper. mantle anomaly basement upstream oil & gas alberta paleo-proterozoic basement electromagnetic imaging conductivity structure inversion conductivity anomaly western canada sedimentary basin boundary foredeep reservoir...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 1994 SEG Annual Meeting, October 23–28, 1994
Paper Number: SEG-1994-0361
... ABSTRACT No preview is available for this paper. diffraction theory conductivity structure integral equation migration reservoir characterization oristaglio geophysics migration method frequency resistivity aperture integral formulation esmersoy bartel holographic method...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 1990 SEG Annual Meeting, September 23–27, 1990
Paper Number: SEG-1990-0510
... ABSTRACT No preview is available for this paper. basin mt field anisotropy falloff crustal anisotropy conductivity contrast long period conductivity structure regional distortion basin model variation high-contrast layer mt field enhancement central california anisotropy...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 1989 SEG Annual Meeting, October 29–November 2, 1989
Paper Number: SEG-1989-0172
... ABSTRACT No preview is available for this paper. variation conductivity structure reservoir characterization geophysics dipole canadian cordilleran transect batholith scale length lemon creek emap data procedure information technology software wavenumber domain em2...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 1988 SEG Annual Meeting, October 30–November 3, 1988
Paper Number: SEG-1988-0229
... anomalous conductivity geophysics inverse solution conductivity structure hohmann inhomogeneity iteration Three-Dimensional Electromagnetic Inversion Perry A. Eaton, Newmont Exploration Ltd., formerly University of Utah; and Gerald W Hohmann, University of Utah EM 2.3 SUMMARY We describe here...