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Keywords: spm effect
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Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13609710
... polarization effects were found to be essential to fit most of the observed data. It was also possible in some areas to separate SPM effects from IP effects in the data. Most induced polarization effects in this unusually polarizable area were fit a Cole-Cole decay characterized with a frequency dependence...
Proceedings Papers

Paper presented at the 2016 SEG International Exposition and Annual Meeting, October 16–21, 2016
Paper Number: SEG-2016-13964204
... called magnetic relaxation or magnetic viscosity. Olhoeft and Strangway (1974) predicted that the SPM effect could become relatively more important and permit mapping of magnetite content with an active, more sophisticated EM system. However, as a background effect it could also represent an additional...
Proceedings Papers

Paper presented at the 2015 SEG Annual Meeting, October 18–23, 2015
Paper Number: SEG-2015-5852566
... of SPM. As a result, there is no need to use two vertically offset receivers to identify SPM with certainty Introduction SPM effects in ground EM data were identified by Lee (1980) and more recently discussed by Barsukov and Fainberg (2001). Recent lowering of the noise levels in AEM systems has...
Proceedings Papers

Paper presented at the 2014 SEG Annual Meeting, October 26–31, 2014
Paper Number: SEG-2014-1453
... loops and larger offsets between transmitter and receiver loops reduce SPM effects. For a single-receiver AEM system and the modeled parameters, the optimum survey height for SPM-deep conductor discrimination was determined to be 90-100 m. The examination of VTEM survey data shows that, depending...

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