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An improvement to the transformation algorithm for the transient electromagnetic field
Xue JunJie1; Zhong HuaSen2,3; Li Hai2,3; Li Xiu4; Di QingYun3; Wang HeYuan5; Tong ZhaoCheng1
AbstractMathematically, there exist an effective transformation relationship between the electromagnetic (EM) and virtual seismic data fields, by which one can effectively to identify the underground target's interfaces using the EM method. Such transformation is a uncertain problem, which can be treated by the singular value decomposition (SVD) method. Because large singular values control main information of inversion matrix, small singular values are usually less important. So one usually ignores small singular values during singular value decomposition caluculation, leading to low precision results. To solve this problem, a new algorithm named the modified truncated singular value decomposition method was proposed, in which the ridge estimation method is used to calculate the virtual wave field caused by small singular values. The results of model calculation show that the improved truncated singular value method is better than the traditional singular value decomposition method. Using this new method, the survey data from a gob area of a coal mine was processed, and the interface of this area was successfully identified.
KeywordWave-field transformation Singular value decomposition method Truncated singular Value method Modified truncated singular value method Numerical calculation
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000454466600031
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Document Type期刊论文
Corresponding AuthorDi QingYun
Affiliation1.Liaoning Univ Technol, Coll Sci, Jinzhou 121001, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
3.Chinese Acad Sci Univ, Beijing 100049, Peoples R China
4.Changan Univ, Sch Geol Engn & Geomat, Xian 710054, Shaanxi, Peoples R China
5.Shenyang Normal Univ, Shenyang 110034, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Xue JunJie,Zhong HuaSen,Li Hai,et al. An improvement to the transformation algorithm for the transient electromagnetic field[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2018,61(12):5077-5083.
APA Xue JunJie.,Zhong HuaSen.,Li Hai.,Li Xiu.,Di QingYun.,...&Tong ZhaoCheng.(2018).An improvement to the transformation algorithm for the transient electromagnetic field.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,61(12),5077-5083.
MLA Xue JunJie,et al."An improvement to the transformation algorithm for the transient electromagnetic field".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 61.12(2018):5077-5083.
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