Quasi MT Inversion of Short-Offset Transient Electromagnetic Data
The short-offset transient electromagnetic method (SOTEM) has been extensively used for mineral and hydrocarbon exploration and hydrogeological investigations due to its ease of use and capability to generate diagnostic subsurface information.At present, the data processing methods of SOTEM are mainly focused on one dimensional inversion.To apply the proven inversion methods of frequency domain electromagnetic methods to SOTEM data, this paper presents a new transformation relation from time to frequency based on the similarity between SOTEM all-time apparent resistivity and magnetotelluric (MT) apparent resistivity.Results show that the transformation coefficients depend on the variation trend of SOTEM all-time apparent resistivity curves.Bostick inversion and conjugate gradient inversion techniques were applied to transformed SOTEM data and the results were validated by some simulated calculations and field measured data.This study provides a novel method to SOTEM data processing and a useful aid to join inversion with MT data.
SOTEM time-frequency transformation inversion conjugate gradient inversion
WEI-YING CHEN GUO-QIANG XUE MUHAMMAD YOUNIS KHAN
Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Science Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Science
国际会议
中国科学院地质与地球物理研究所2016年度(第16届)学术年会
北京
英文
327-327
2017-01-01（万方平台首次上网日期，不代表论文的发表时间）