JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2015, Vol. 45 ›› Issue (3): 48-57.doi: 10.6040/j.issn.1672-3961.0.2014.096

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One-dimensional modeling and inversion of nuclear magnetic resonance over electrically conductive medium

QI Zhipeng, LI Xiu, ZHAO Wei, ZHI Qingquan, LIU Lei   

  1. College of Geology Engineering and Geomatics, Chang'an University, Xi'an 710054, Shaanxi, China
  • Received:2014-04-03 Revised:2015-04-14 Published:2014-04-03

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Abstract: A 1D (one-dimensional) nuclear magnetic resonance (NMR) modeling and inversion method was proposed, which considered the influence of conductive layered media. The NMR exciting magnetic field was calculated with the frequency domain magnetic field response of layered conductive media. The kernel function was modified in the calculation process and the oscillation was thereby reduced, which made it easier in integration. The 1D NMR modeling considering the influence of conductivity was implemented based on the above technique. For the inversion interpretation, the inversion of water content parameter of water-bearing layers was implemented with hyper plane fitting technique after the geoelectric section was derived from TEM (transient electromagnetic method). The inversion results were basically the same as those derived from commercial software. And the inversion results of the proposed method give more information on stratification.

Key words: dual Bessel function integral, hyper plane method, one-dimensional modeling and inversion, nuclear magnetic resonance, conductivity effect

CLC Number: 

  • P654.7
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