物探与化探2016，Vol.40Issue(6)：1178-1184,7.DOI:10.11720/wtyht.2016.6.19
对人工源频域电磁法视电阻率的探讨
A tentative discussion on apparent resistivity of the artificial source frequency domain electromagnetic method
摘要
Abstract
In this paper the authors proposed three methods to calculate the apparent resistivity for frequency domain controlled source electromagnetic methods. Comparison was carried out involving the analysis of their related theory, 1-D geoelectric forward modeling re-sults and field data. The results show that the wide field apparent resistivity can better interpret the geological base resistivity and has such advantages as strong anti-interference capability but has the shortcoming of complex formula. The far field apparent resistivity with simple formula and likewise strong anti-interference capability gives less information on the base resistivity.At far field and transition zone, the result from the wide field apparent resistivity is similar to that of the apparent resistivity method. The result of the Cagniard apparent resistivity in the far-zone is similar to that of the two methods mentioned above with the simple formula, in which extra magnet-ic field is required which leads to relatively weak anti-interference capability and poor efficiency. However, the method can not resolve the base resistivity. The comparison of the resolutions on the base resistivity shows that the wide field apparent resistivity is the most fa-vorable method among these methods, followed by the far-zone apparent resistivity, and the last is the Cagniard resistivity. However, the formulas of the last two methods are relatively simpler. The computation cost for the last two methods is less than that of the first one. The inconsistency of the three methods is observed at the far field, which absolutely needs further studies.关键词
广域视电阻率/远区视电阻率/卡尼亚视电阻率/计算量/抗干扰Key words
wide field resistivity/far-zone resistivity/Cagniard resistivity/amount of calculation/anti-interference分类
天文与地球科学引用本文复制引用
龙西亭,刘春明,柳建新,赵于前..对人工源频域电磁法视电阻率的探讨[J].物探与化探,2016,40(6):1178-1184,7.基金项目
湖南省自然科学基金项目(2015JJ2151) （2015JJ2151）
国家自然科学基金(61402539) （61402539）
