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基于二次场电导率分块连续变化的三维可控源电磁有限元数值模拟

DOI: 10.6038/cjg20150331, PP. 1072-1087

Keywords: 可控源电磁法,二次场,电导率分块连续变化,有限元法,三维

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Abstract:

从电偶源三维地电断面可控源电磁法的二次电场边值问题及其变分问题出发,采用任意六面体单元对研究区域进行剖分,并且在单元分析中同时对电导率及二次电场进行三线性插值,实现电导率分块连续变化情况下,基于二次场的可控源电磁三维有限元数值模拟.这个新的可控源电磁三维正演方法可以模拟实际勘探中地下任意形状及电性参数连续变化的复杂模型.理论模型的计算结果表明,均匀大地计算的视电阻率误差和相位误差分别为0.002%和0.0005°.分层连续变化模型的有限元计算结果表明,其与对应的分层均匀模型解析结果有明显差异.三维异常体组合模型以及倾斜异常体等复杂模型的有限元计算结果也有效地反映了异常形态.

References

[1]  Di Q Y, Unsworth M, Wang M Y. 2004a. 2. 5D CSAMT modeling with finite element method. Progress in Geophysics (in Chinese), 19(2): 317-324, doi: 10.3969/j.issn.1004-2903.2004.02.018.
[2]  Di Q Y, Unsworth M, Wang M Y. 2004b. 2. 5D CSAMT modeling with finite element over 2D complex earth media. Chinese J. Geophys. (in Chinese), 47(4): 723-730.
[3]  Di Q Y, Wang R. 2008. CSAMT Forward Modeling and Inversion and Its Application (in Chinese). Beijing: Science Press.
[4]  Fu C M, Di Q Y, Wang M Y. 2009. 3D numeric simulation of marine controlled source electromagnetics (MCSEM). Oil Geophysical Prospecting (in Chinese), 44(3): 358-363.
[5]  He J S. 1990. Controlled Source Audio Frequency Magnetotellurics Method (in Chinese). Changsha: Central South University of Technology Press.
[6]  Jin J M. 1998. Finite Element Method of Electromagnetic Field (in Chinese). Xi''an: Xi''an Electronic Science and Technology University Press.
[7]  Lei D. 2010. Studies and applications of 2-D CSAMT modeling and inversion with a dipole source and topography. Chinese J. Geophys. (in Chinese), 53(4): 982-993, doi: 10.3969/j.issn.0001-5733.2010.04.023.
[8]  Li Y, Lin P R, Li T L, et al. 2011. Finite element method for solving anomalous complex potential of 2. 5-D complex resistivity. Journal of Jilin University (Earth Science Edition) (in Chinese), 41(5): 1596-1604.
[9]  Li Y G, Key K. 2007. 2D marine controlled-source electromagnetic modeling: Part 1—An adaptive finite-element algorithm. Geophysics, 72(2): WA51-WA62.
[10]  Liu Y, Wang X B. 2012. The FEM for modeling 2-D MT with continuous variation of electric parameters within each block. Chinese J. Geophys. (in Chinese), 55(6): 2079-2086, doi: 10.6038/j.issn.0001-5733.2012.06.029..
[11]  Meng Y L, Luo Y Z. 1996. Two-dimensional bipolar source CSAMT finite element forward (in Chinese). //Collected Works Geophysical Exploration Geochemistry. No. 20 Electrical Album. Beijing: Geological Publishing House.
[12]  Mitsuhata Y J. 2000. 2-D electromagnetic modeling by finite-element method with a dipole source and topography. Geophysics, 65(2): 465-475.
[13]  Pridmore D F, Hohmann G W, Ward S H, et al. 1981. An investigation of finite-element modeling for electrical and electromagnetic data in three dimensions. Geophysics, 46(7): 1009-1024.
[14]  Ruan B Y, Xu S Z. 1998. FEM for modeling resistivity sounding on 2-D geoelectric model with line variation of conductivity within each block. Earth Science-Journal of China University of Geosciences (in Chinese), 23(3): 303-307.
[15]  Zhang J F, Tang J T, Yu Y, et al. 2009b. Three dimensional controlled source electromagnetic numerical simulation based on electric field vector wave equation using finite element method. Chinese J. Geophys. (in Chinese), 52(12): 3132-3141, doi: 10.3969/j.issn.0001-5733.2009.12.023.
[16]  Zhdanov M S, Lee S K, Yoshioka K. 2006. Integral equation method for 3D modeling of electromagnetic fields in complex structures with inhomogeneous background conductivity. Geophysics, 71(6): G333-G345.
[17]  Chen X B, Hu W B. 2002. Direct iterative finite element (dife) algorithm and its application to electromagnetic response modeling of line current source. Chinese J. Geophys. (in Chinese), 45(1): 119-130.
[18]  Coggon J H. 1971. Electromagnetic and electrical modeling by the finite element method. Geophysics, 36(1): 132-155.
[19]  Deng J Z, Tan H D, Chen H, et al. 2011. CSAMT 3D modeling using staggered-grid finite difference method. Progress in Geophysics (in Chinese), 26(6): 2026-2032, doi: 10.3969/j.issn.1004-2903.2011.06.017.
[20]  Ruan B Y, Xiong B. 2000. A finite element modeling of three-dimensional resistivity sounding with continuous conductivity. Chinese J. Geophys. (in Chinese), 45(1): 131-138.
[21]  Shen J S. 2003. Modeling of 3-D electromagnetic responses in frequency domain by using straggered-grid finite difference method. Chinese J. Geophys. (in Chinese), 46(2): 281-288.
[22]  Shi K F. 1999. The Theory and Application of Controlled-Source Magnetotellurics (in Chinese). Beijing: Science Press.
[23]  Tang J T, He J S. 2005. Controlled Source Audio Frequency Magnetotellurics Method and Its Applications (in Chinese). Changsha: Central South University Press.
[24]  Tang J T, Ren Z Y, Hua X R. 2007. Theoretical analysis of geoelectromagnetic modeling on Coulomb gauged potentials by adaptive finite element method. Chinese J. Geophys. (in Chinese), 50(5): 1584-1594.
[25]  Unsworth M J, Travis B J, Chave A D. 1993. Electromagnetic induction by a finite electric dipole source over a 2-D earth. Geophysics, 58(2): 198-214.
[26]  Wang R, Wang M Y, Di Q Y. 2006. Electromagnetic modeling due to line source in frequency domain using finite element method. Chinese J. Geophys. (in Chinese), 49(6): 1858-1866.
[27]  Wang R, Wang M Y, Lu Y L. 2007. Preliminary study on 3D CSAMT method modeling using finite element method. Progress in Geophysics (in Chinese), 22(2): 579-585, doi: 10.3969/j.issn.1004-2903.2007.02.035.
[28]  Weiss C J, Constable S. 2006. Mapping thin resistors and hydrocarbons with marine EM methods, Part II: Modeling and analysis in 3D. Geophysics, 71(6): G321-G332.
[29]  Xu S Z. 1994. The Finte Element Method in Geophysics (in Chinese). Beijing: Science Press.
[30]  Xu S Z, Yu T, Li Y G, et al. 1995. The finite element method for modeling 2-D MT field on a geoelectrical model with continuous variation of conductivity within each block(Ⅰ). Geological Journal of Universities (in Chinese), 1(2): 65-73.
[31]  Xu Z F, Wu X P. 2010. Controlled source electromagnetic 3-D modeling in frequency domain by finite element method. Chinese J. Geophys. (in Chinese), 53(8): 1931-1939, doi: 10.3969/j.issn.0001-5733.2010.08.019.
[32]  Xue Y F, Zhang J F. 2011. Three dimensional controlled source electromagnetic numerical simulation based on the rock properties of the west line of South-to-North Water Diversion Project using Finite Element Method. Chinese J. Geophys. (in Chinese), 54(8): 2160-2168, doi: 10.3969/j.issn.0001-5733.2011.08.024.
[33]  Yan S, Chen M S. 2000. Finite element solution of three dimensional geoelectric models in frequency electromagnetic sounding excited by a horizontal electric dipole. Coal Geology & Exploration (in Chinese), 28(3): 50-56.
[34]  Zhang J F, Tang J T, Yu Y, et al. 2009a. Finite element numerical simulation on line controlled source based on quadratic interpolation. Journal of Jilin University (Earth Science Edition) (in Chinese), 39(5): 929-935.

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