基于全区视电阻率的瞬变电磁一维Occam反演中雅克比矩阵的解析算法

doi:10.11720/wtyht.2020.1354

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Abstract

In the current engineering application, one-dimensional inversion result of TEM sounding is still an important basis for geological interpretation. In order to improve the computational efficiency and accuracy of one-dimensional inversion, it is necessary to analytically derive Jacobian matrix of one-dimensional forward. In this paper, the analytical formulas of Jacobian matrix in one-dimensional forward of central loop transient electromagnetic based on all-time resisitivity are derived in detail. It is proved that the formulas are correct and worth adopting, as shown by testing one-dimensional Occam inversion of theoretical model and measured data.

Key words： TEM all-time apparent resisitivity Jacobian matrix Occam inversion geothermal exploration

Received: 08 July 2019 Published: 24 June 2020

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	Song-Wei GUO
	Xiao-Pan LIU
	Kai ZHENG
	Lei ZHANG

Cite this article:

Song-Wei GUO,Xiao-Pan LIU,Kai ZHENG, et al. Analytical algorithms of Jacobian matrix in one-dimensional Occam inversion of central loop transient electromagnetism based on all-time apparent ressivivity[J]. Geophysical and Geochemical Exploration, 2020, 44(3): 559-567.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2020.1354 OR https://www.wutanyuhuatan.com/EN/Y2020/V44/I3/559

Comparison of H-type layered Model inversion results

Inversion result parameters of H-type layered model

Comparison of K-type layered Model inversion results

Inversion result parameters of K-type layered model

Geological map of work area
1—middle low mountain; 2—piedmont inclined plain; 3—Quaternary Holocene alluvial proluvial; 4—Jurassic volcanic rock; 5—Archaean Sanggan group gneiss; 6—Archaean porphyry like granite; 7—fracture fracture Fracture Zone; 8—test TEM sounding line; 9—geological boundary; 10—geomorphic boundary; 11—existing drilling;12—verification of geothermal drilling (DR2); 13—TEM emission line frame position; 14—TEM receiving coil position

Borehole histogram of work area

Inversion result of site 820 where is projectionposition of borehole

Comparison of TEM inversion sections of line 400
a—pseudo section; b—smoke ring inversion section; c—Occam inversion section

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