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Keywords: resistive layer
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Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2991664
... environment however, vertical currents can be generated by a loop which is not horizontal. Such differences in current flow can result in very different sensitivity to subsurface structure. For example, a nonhorizontal transmitter in the marine environment can be used to map thin resistive layers, while...
Proceedings Papers

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2997244
... resistive layer electromagnetic data resistivity amplitude model parameter iteration annual meeting model space reservoir characterization geophysics seg international exposition Ayani , M. , S. Mallick , J. Hunziker , and L. MacGregor , 2017 , Inversion...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17783322
... generated from two different horizontally stratified earth models. The first model had one thin resistive hydrocarbon layer between the low-resistive sediments, whereas the second model had multiple thin resistive layers. For both cases, our inversion estimated the resistivity to a reasonable accuracy...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5846074
... curvature resistive layer reservoir characterization inverse model em transient electromagnetic method maxima variation inversion standard deviation resistivity thickness conductive layer valley model noise average model log-gating scheme time interval adaptive-gating scheme Adaptive...
Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-3893
.... The 1D analysis demonstrates that the far offset measurement of the standard CSEM has more sensitivity to the presence of the resistive layer than the vertical source-receiver time domain measurement done at close offsets from the source. Closed form solutions derived for the guided mode of the fields...
Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-0764
... Introduction Summary A circular electrical dipole creates a field consisting only of a TM mode. This results in enhanced sensitivity towards thin resistive layers. As the B-field components are zero over layered cases their measurement results in an exceptional sensitivity towards 3D...
Proceedings Papers

Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-0665
... into the public domain. australia exmouth plateau variance resistivity resistive layer plateau geologic model steven constable hydrate seg seg denver 2010 scripp institution amplitude csem inversion upstream oil & gas structural geology marine csem hydrocarbon exploration reservoir...
Proceedings Papers

Paper presented at the 2009 SEG Annual Meeting, October 25–30, 2009
Paper Number: SEG-2009-0794
... SUMMARY Analytical expressions are derived for the electromagnetic (EM) fields observed in the vicinity of a vertical dipole source, due to the response of resistive layer embedded in a conductive background. The analytical expressions for the fields observed at zero offset are validated...
Proceedings Papers

Paper presented at the 2008 SEG Annual Meeting, November 9–14, 2008
Paper Number: SEG-2008-2684
... upstream oil & gas resistivity structure approximated information amt model resistivity structure log analysis smooth structure induction log well logging inverse model borehole data resistive layer main menu relationship cave valley mcphee constraint amt data reservoir...
Proceedings Papers

Paper presented at the 2007 SEG Annual Meeting, September 23–28, 2007
Paper Number: SEG-2007-0638
... SUMMARY In marine CSEM and SBL the seabed subsurface is explored by emitting low-frequency signals from an electric dipole source which is towed close to the seabed. The main goal is to detect and characterize possible thin resistive layers within the conductive surroundings beneath the seabed...
Proceedings Papers

Paper presented at the 2007 SEG Annual Meeting, September 23–28, 2007
Paper Number: SEG-2007-0564
... to thin resistive layers buried in the subsurface. This sensitivity relies on two important properties. First, the distance between the source and the receiver must be sufficiently large to obtain a response from the resistive layer. Second, a vertical component of the electric field must be present...
Proceedings Papers

Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-0546
... frequencies, over the two models shown in figure 1 while in figure 2b we present the normalized response i.e. the four-layer response divided by the two-layer response. The relative increase in signal strength in the presence of a resistive layer is obvious and becomes more prominent with larger sea depths...
Proceedings Papers

Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-0605
... by an array of receivers at the seabed. They consist of a series of two orthogonal electrical dipoles located on the sea floor. The measure of the electric field and the magnitude variations vs. offset depend on the resistivity distribution in the explored medium. In resistive layers, such as a hydrocarbon...
Proceedings Papers

Paper presented at the 2001 SEG Annual Meeting, September 9–14, 2001
Paper Number: SEG-2001-1455
..., the two resulting models can be independently evaluated, and the best resolved parameters used in the interpretation. tem electrical resistivity mutually earth science resistive layer matrix geophysics resistivity resistivity resistivity san antonio interpretation joint inversion...
Proceedings Papers

Paper presented at the 1997 SEG Annual Meeting, November 2–7, 1997
Paper Number: SEG-1997-0378
... of an inhomo- geneous subsurface conductive and resistive layers. The resistive layer is underlain by a 1-D section. We will consider the simplest model, assuming that the subsurface conductance is known from the interpretation of high frequency measurements. (A) Then the tangential magnetic field...
Proceedings Papers

Paper presented at the 1990 SEG Annual Meeting, September 23–27, 1990
Paper Number: SEG-1990-0528
... ABSTRACT No preview is available for this paper. island geothermal reservoir resistive layer france exploration piton reunion island deep groundwater survey basement interpretation data quality field survey groundwater survey resistivity sink hole structure...
Proceedings Papers

Paper presented at the 1984 SEG Annual Meeting, December 2–6, 1984
Paper Number: SEG-1984-0060
... conductivity geologic control electric field equation resistive layer distinct advantage static correction reservoir characterization 60 Electrical Methods I matrices. I have chosen the basic Gauss-Jordan technique. transient soundings. The magnetotelluric interpretation indi- This algorithm...

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