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Keywords: total-field anomaly
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Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428252
... We propose a fast iterative equivalent-layer technique for processing large magnetic data sets. The equivalent layer- technique describes the potential-field data produced by geological sources using a fictitious physical-property distribution on a layer. By assuming that the total-field anomaly...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428268
... characterization anomaly southern brazil equivalent layer positivity constraint total-field anomaly remanent magnetization direction seg international exposition total magnetization direction Estimate of the remanent magnetization direction via equivalent layer Shayane P. Gonzalez , Vale´ria C. F...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215222
... ABSTRACT We propose the use of the amplitude of the magnetic vector (B) for qualitative interpretation at low latitudes. The B is computed from transforming the total-field anomaly into the three orthogonal components in the x-, y-, and z-directions. The B generates a maximum over the source...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3215805
... ABSTRACT We present a method for inverting total-field anomaly data to estimate the geometry of a 3D geological source in the subsurface. The method assumes that both the magnetization vector and the depth to the top of the source are known. We use an ensemble of vertically juxtaposed 3D right...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216745
... ABSTRACT We propose a new method for estimating the total magnetization direction of magnetic sources based on the inversion of total-field anomaly via equivalent-layer technique. This technique is commonly used for processing magnetic data by estimating a magnetic-moment distribution over...
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-2018-2997991
...-level curve interpretation total-field anomaly misfit wavelet transform magnetic anomaly reservoir characterization hyperbola source location field direction anomaly dipole direction contour line cone artificial intelligence Curtis , S. R. , and A. V. Oppenheim , 1987...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13957163
... differentiation algorithm annual meeting inversion artificial intelligence upstream oil & gas remanent magnetization application differentiation result reservoir characterization total-field anomaly seg seg international exposition Bezdek , J. C. , 1981 , Pattern recognition...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5859537
..., this filter is referred to as 3D analytical signal amplitude (ASA), i.e.: enhancement observatório nacional felsberg tilt angle local phase total-field anomaly geological contact upstream oil & gas fracture zone scale-space monogenic signal representation structural geology basin...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-1041
... artificial intelligence upstream oil & gas fcm formulation geophysics reservoir characterization magnetization direction inversion machine learning magnetic data total-field anomaly cluster center Total magnetization vector inversion using guided fuzzy c-means clustering Yaoguo Li...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0093
... for the magnetic response attenuation over the continental slope as a result of: (i) the seaward increase of the distance between the source and the magnetometer and (ii) the seaward decrease in the volume of sources within the continental crust. In the DPF each observation of the total-field anomaly is multiplied...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0515
... requires three orthogonal components of the magnetic anomaly, and they must be calculated from the total-field anomaly unless three-component magnetic measurements are available such as those presented by Dransfield and Liu (2003). The most common approach to calculating the three components is by using...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2010 SEG Annual Meeting, October 17–22, 2010
Paper Number: SEG-2010-1784
... in them. The gra- dient itself provides advantages over the total-field anomaly alone such as enhanced signal-to-noise ratio obtained from common-mode noise rejection. Gradients in airborne magne- tometry have been used in the past to analyze two-dimensional bodies (Nelson, 1988) as well as enhancing...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-0688
... of N total-field anomaly observations of an offshore survey over a region containing linear magnetic structures cutting the continental crust (Figure 1), where xi and yi are, the horizontal coordinates along the north and east directions, respectively, and zi is the vertical coordinate of the i...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2005 SEG Annual Meeting, November 6–11, 2005
Paper Number: SEG-2005-1133
... to perform automatic anomaly based on computed SI. automatic detection uxo target algorithm hilbert transform magnetic data magnetic anomaly detection algorithm structural index detection deconvolution euler deconvolution artificial intelligence nse 4 total-field anomaly equation...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2004 SEG Annual Meeting, October 10–15, 2004
Paper Number: SEG-2004-1191
.... In this paper, we propose a comprehensive methodology for solving this problem by examining a suite of approaches of practical utility. We illustrate these methods with a set of high-resolution aeromagnetic data acquired for diamond exploration in the Canadian Arctic. inclination total-field anomaly...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 2003 SEG Annual Meeting, October 26–31, 2003
Paper Number: SEG-2003-0596
... Summary Unlike the 2D case, the total gradient (magnitude of the gradient vector) in 3D is not the envelope of either the vertical or horizontal derivatives of the total-field anomaly over all possible directions of the earth''s field and source magnetization. Instead, the total gradient...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 1997 SEG Annual Meeting, November 2–7, 1997
Paper Number: SEG-1997-0539
... ABSTRACT No preview is available for this paper. knowledge correlation euler deconvolution equation baselevel gradient acceptance criterion estimation standard deviation reid structural index barbosa criterion data window total-field anomaly federal university anomaly...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 1997 SEG Annual Meeting, November 2–7, 1997
Paper Number: SEG-1997-0543
... ABSTRACT No preview is available for this paper. equation total-field anomaly stability analysis anomaly tail vertical position horizontal cylinder data window structural index anomaly horizontal plane baselevel euler deconvolution gradient smallest singular value...
Proceedings Papers
Publisher: Society of Exploration Geophysicists
Paper presented at the 1995 SEG Annual Meeting, October 8–13, 1995
Paper Number: SEG-1995-0268
... ABSTRACT No preview is available for this paper. xia aeromagnetic data bhattacharyya magnetization reduced-to-the-pole anomaly yarger inclination total-field anomaly declination contour interval equivalent source technique potential-field data upstream oil & gas kansas...