ZTEM二维非线性共轭梯度反演研究

doi:10.11720/wtyht.2019.1297

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摘要

ZTEM(Z轴倾子电磁法)是一种天然场源的频率域航空电磁法,其特点是磁场垂直分量在空中机载平台测量,磁场水平分量在地面的固定基站测量,具有勘探深度大、速度快、成本低、覆盖面积大等技术优势。本文实现了ZTEM二维有限差分正演和二维非线性共轭梯度(NLCG)反演算法。研究对象是倾子资料,反演过程中通过解“拟正演”问题来避开雅克比矩阵的直接计算。通过理论模型合成数据反演试算,验证了ZTEM倾子资料二维NLCG反演算法的稳定性与可靠性。与大地电磁(MT)TE模式阻抗资料反演结果进行对比,发现在异常体横向边界的约束方面,ZTEM倾子反演比MT阻抗反演更具优越性。

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	许智博
	谭捍东

关键词 ： ZTEM, 倾子, 航空电磁法, 二维反演, 非线性共轭梯度法

Abstract：

The ZTEM (Z-Axis Tipper Electromagnetics) is a frequency-domain airborne electromagnetic method that results from natural sources. It has the feature that the vertical component of magnetic field is measured from a moving helicopter platform and the horizontal component of magnetic field is measured at a reference station on the ground. In addition, it has the advantages of deep exploration, fast speed, low cost and large coverage area. This paper realizes the 2D finite difference forward modeling and NLCG inversion of ZTEM. The object of the study is the tipper data. The direct calculation of Jacobian matrix is avoided by solving the "quasi-forward" problem in the inversion process. The stability and reliability of the 2D NLCG inversion of ZTEM tipper data are verified by the trial calculation of synthetic data inversion of theoretical model. A comparison with the inversion result of impedance data of magnetotelluric (MT) TE mode shows that the ZTEM tipper inversion is superior to the MT impedance inversion in the constraint of the lateral boundary of the anomalous body.

Key words： Z-Axis Tipper Electromagnetics tipper airborne electromagnetic survey 2D inversion NLCG

收稿日期: 2018-08-10 出版日期: 2019-04-10

P631

基金资助:国家重点研发计划课题“综合航空地球物理数据处理;解释和管理软件平台研发”(2017YFC0602204);国家自然科学基金(41830429)联合资助

作者简介: 许智博(1990-),男,硕士,助教,主要从事电法勘探、数值模拟算法研究。Email: 283483358@qq.com;

引用本文:

许智博, 谭捍东. ZTEM二维非线性共轭梯度反演研究[J]. 物探与化探, 2019, 43(2): 393-400.
Zhi-Bo XU, Han-Dong TAN. Two-dimensional nonlinear conjugate gradient inversion of ZTEM. Geophysical and Geochemical Exploration, 2019, 43(2): 393-400.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2019.1297 或 https://www.wutanyuhuatan.com/CN/Y2019/V43/I2/393

Fig.1 二维目标体模型

Fig.2 二维模型倾子响应的二维有限差分数值解与三维数值解的对比

Fig.3 单个异常体模型示意

Fig.4 拟合差随迭代次数收敛曲线

Fig.5 对单个异常体模型产生的ZTEM倾子数据进行反演的结果

Fig.6 对单个异常体模型产生的MT阻抗数据进行反演的结果

Fig.7 两个异常体模型示意

Fig.8 拟合差随迭代次数收敛曲线

Fig.9 对两个异常体模型产生的ZTEM倾子数据进行反演的结果

Fig.10 对两个异常体模型产生的MT阻抗数据进行反演的结果

[1]	Mackie R L, Madden T R . Three-dimensional magnetotelluric inversion using conjugate gradients[J]. Geophysics.J.Int., 1993,115:215-229. doi: 10.1111/j.1365-246X.1993.tb05600.x
[2]	Rodi W, Mackie R L . Nonlinear conjugate gradients algorithm for 2-D magnetotelluric inversion[J]. Geophysics, 2001,1(1):174-187.
[3]	Lin C H, Tan H D, Tong T . Three-dimensional conjugate gradient inversion of magnetotelluric sounding data[J]. Applied Geophysics (in Chinese), 2008,5(4):314-321. doi: 10.1007/s11770-008-0043-1
[4]	Ward S H . AFMAG—airborne and ground[J]. Geophysics, 1959,24(4):761-787. doi: 10.1190/1.1438657
[5]	Ward S H, O’Donnell J, Rivera R ,et al.AFMAG-application and limitation[J]. Geophysics, 1966,31(3):576-605. doi: 10.1190/1.1439795
[6]	Lo B, Zang M. Numerical modeling of Z-TEM (airborne AFMAG) responses to guide exploration strategies [C]// 78th International Exposition and Annual Meeting, SEG, Expanded Abstracts, 2008, 1098-1102.
[7]	Labson V F, Becker A, Morrison H F , et al. Geophysical exploration with audiofrequency natural magnetic fields[J]. Geophysics, 1985,50(4):656-664 doi: 10.1190/1.1441940
[8]	吴頔 . 二维及三维倾子响应和异常体识别[D]. 长沙:中南大学, 2012.
[8]	Wu D . 2D and 3D tipper response and abnormal body recognition[D]. Changsha: Central South University, 2012.
[9]	余年, 王绪本, 阚瑷珂 , 等. 倾子和视倾子的研究及在断裂解释中的应用[J]. 工程地物学报, 2007,4(4):275-281. doi: 10.3969/j.issn.1672-7940.2007.04.002
[9]	Yu N, Wang X B, Kan Y K , et al .Research on tilter and apparent tilter and its application in fracture interpretation[J]. Geophysical and Geochemical Exploration, 2007,4(4):275-281.
[10]	林昌洪, 谭捍东, 佟拓 . 倾子资料三维共轭梯度反演研究[J]. 地球物理学报, 2011,54(4):1106-1113. doi: 10.3969/j.issn.0001-5733.2011.04.026
[10]	Lin C H, Tan H D, Tong T . 3D conjugate gradient inversion of dipper data[J]. Applied Geophysics, 2011,54(4):1106-1113.
[11]	Holtham E, Oldenburg D W . Three-dimensional inversion of ZTEM data[J]. Geophysical Journal International, 2010,182:168-182.
[12]	Holtham E, Oldenburg D W. Three-dimensional inversion of MT and ZTEM data [C]// 80th Ann Internet Mtg, SEG,Expanded Abstracts, 2010: 655-659.
[13]	Wang T, Tan H D, Li Z Q , et al. 3D finite-difference modeling algorithm and anomaly features of ZTEM[J]. Applied Geophysics (in Chinese), 2016,13(3):553-560. doi: 10.1007/s11770-016-0566-9
[14]	王绪本 . 二维大地电磁测深资料处理与反演解释方法研究[D]. 成都:成都理工大学, 2002.
[14]	Wang X B . Research on processing and inversion interpretation method of two-dimensional magnetotelluric sounding data[D]. Chengdu:Chengdu University of Technology, 2002.
[15]	Madden T R . Transmission systems and network analogies to geophysical forward and inverse problems[M]. ONR Technical Report, 1972: 72-3.
[16]	胡文宝, 苏朱刘, 陈清礼 , 等. 倾子资料的特征及应用[J]. 石油地球物理勘探, 1997,32(2):202-213.
[16]	Hu W B, Su Z L, Chen Q L , et al. Characteristics and application of tilter data[J]. Oil Geophysical Prospecting, 1997,32(2):202-213.
[17]	陈小斌, 赵国泽, 詹艳 , 等. 磁倾子矢量的图示分析及其应用研究[J]. 地学前缘, 2004,1(4):626-636. doi: 10.3321/j.issn:1005-2321.2004.04.030
[17]	Chen X B, Zhao G Z, Zhan Y , et al. Analysis of tipper visual vectors and its application[J]. Geoscience Frontiers, 2004,1(4):626-636.
[18]	陈清礼, 胡文宝, 李金铭 , 等. 埋藏球体的倾子响应特征分析[J]. 石油天然气学报, 2007,29(3):75-78.
[18]	Chen Q l, Hu W B, Li J M , et al. Analysis of tipper response characteristics of buried sphere[J]. Journal of Oil and Gas Technology, 2007,29(3):75-78.
[19]	马为 . MT 二维正演中辅助场计算新方法研究[R]. 中国地震局地质研究所, 2007.
[19]	Ma W . A new method for calculating auxiliary field in MT two-dimensional forward modeling[R].Institute of Geology, China Earthquake Administration, 2007.
[20]	陈小斌 . MT二维正演计算中地形影响的研究[J]. 石油物探, 2000,39(3):112-120. doi: 10.3969/j.issn.1000-1441.2000.03.015
[20]	Chen X B . Research on terrain effect in MT two-dimensional forward modeling[J]. Oil Exploration, 2000,39(3):112-120.

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