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Keywords: magnetization direction
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Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583288
.... Experiments on gravity data show that the proposed inversion method has good robustness and generalization. In addition, the deep-learning-based inversion by using the magnitude magnetic data ( T a ) can greatly eliminate the influence of magnetization direction. Note: This paper was accepted...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583434
... The determination of the total magnetization direction is vital of importance for the inversion and interpretation of magnetic anomalies because the total magnetization direction includes the influence of strong remanent magnetization. The cross-correlation method is commonly used to estimate...
Proceedings Papers

Paper presented at the SEG/AAPG/SEPM First International Meeting for Applied Geoscience & Energy, September 26–October 1, 2021
Paper Number: SEG-2021-3583423
... region, we use the IDQ curve to estimate the direction of the remanent magnetization. The results show that the remanent magnetization direction, extracted from magnetic anomaly, can not only indicate the information of local geological activities, but also be used to classify the lithologies of the sub...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428268
... We present a methodology for estimating the remanent magnetization direction via a new approach of the equivalent layer technique. Our method is grounded on the fact that the total magnetization of a magnetic source is the vectorial sum of its induced and remanent magnetizations. We reformulate...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3426827
... Magnetic data have been widely used for understanding basin structures, mineral deposit systems, and the formation history of volcanism-related geological systems. However, the conventional approaches to magnetic data interpretation, particularly for interpreting magnetization directions...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, September 15–20, 2019
Paper Number: SEG-2019-3216857
... ABSTRACT Proper interpretation of magnetic data requires an accurate knowledge of total magnetization directions of the source bodies in an area of study. In this study, we examined the use of machine learning, specifically Convolutional Neural Network (CNN), to automatically predict...
Proceedings Papers

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

Paper presented at the 2018 SEG International Exposition and Annual Meeting, October 14–19, 2018
Paper Number: SEG-2018-2997039
... plot inverted magnetization direction search path optimal weighting parameter contour line field data artificial intelligence upstream oil & gas optimization algorithm algorithm data-misfit value optimization problem magnetization direction weighting parameter value geophysics...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17781520
... ABSTRACT The determination of the total magnetization direction is necessary for the processing and interpretation of magnetic anomalies, but it is usually unknown under the presence of strong remanent magnetization. Several common-used methods for determining the total magnetization direction...
Proceedings Papers

Paper presented at the 2017 SEG International Exposition and Annual Meeting, September 24–29, 2017
Paper Number: SEG-2017-17796457
... ABSTRACT Magnetization inversion provides an effective way of interpreting magnetic data complicated by remanence. The magnetization directions recovered from magnetization inversion contain important information that is useful for geology differentiation. However, assessing the uncertainty...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13972845
... direction Clark , D. A. , 2014 , Methods for determining remanent and total magnetizations of magnetic sources – a review : Exploration Geophysics , 45 , 271 – 304 , 10.1071/EG14013 . Foss , C. A. , 2004 , Unravelling source spatial parameters and magnetization...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13957163
... a magnetization inversion algorithm based on fuzzy c-means clustering to investigate the utility of recovered magnetization directions in geology differentiation. We use both synthetic and field data sets to illustrate the algorithm, demonstrate the feasibility, and propose a means to quantify the confidence...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13871310
... magnetization model oldenburg metals & mining reservoir characterization interpretation geophysics magnetic anomaly effective susceptibility model magnetization direction susceptibility model amplitude data Anderson , C. , and K. J. Logan , 1992 , The history and current...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13948717
... similar transform correlation methods for estimation of the magnetization direction. It calculates only one transform for many tentative values of the magnetization direction. The method does not use derivatives of any order and the NSS produces a higher level of centricity compared to the total magnitude...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-1041
... Summary We present a new approach to total magnetization vector inversion (MVI) by introducing a statistical constraint through fuzzy c-means clustering. The inversion limits the variation of magnetization directions to a small number of possible orientations and thereby achieves stability...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0996
... by the n -th power of the distance between measurement and source points. For magnetic case, it is independent of magnetization direction but proportional to magnitude of the source strength. For both magnetic and gravity fields, the maximum of the NSS occurs exactly above the source point. We also show...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0993
... Summary For a number of widely used models (e.g., dipole, line of dipoles, dike and contact models), normalized source strength (NSS) can be derived from eigenvalues of the magnetic gradient tensor. The NSS is independent of magnetization direction and its amplitude is only affected...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0079
... magnetization direction mitigating remanent magnetization effect nss normalized source strength Mitigating remanent magnetization effects in magnetic data using the normalized source strength Mark Pilkington*, Geological Survey of Canada, and Majid Beiki, CSIRO Summary Remanent magnetization effects can...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0515
... use of the wavenumber-domain is difficult due to large elevation relief. We then carry out the amplitude inversion to generate a 3D subsurface distribution of effective susceptibility when strong remanent magnetization is present and the general magnetization direction cannot be estimated...
Proceedings Papers

Paper presented at the 2012 SEG Annual Meeting, November 4–9, 2012
Paper Number: SEG-2012-0535
... of practicing geophysicists in the mineral and petroleum industry. interpretation upstream oil & gas algorithm seg remanent magnetization gradiometry magnetization gravity gradiometry data magnetization direction exploration information magnetic data artificial intelligence anomaly...

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