基于三维有限元的航空大地电磁倾子响应特征

doi:10.11720/wtyht.2021.1566

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摘要

倾子是航空大地电磁数据解释的重要参数,研究倾子响应特征对数据解释具有重要意义。文中介绍了航空大地电磁基本原理与ZTEM航空大地电磁数据采集系统,利用三维有限元方法对简单异常体倾子响应进行了模拟,分析测线与岩性分界面斜交情况下倾子T_x与倾子T_y的响应特征。研究结果表明:当测线与岩性分界面斜交时,倾子T_x与倾子T_y响应皆存在且对岩性分界面有所反映,随测线方向改变,倾子表现出相应规律。本文研究进一步加深了倾子对岩性分界面响应特征的理解,可为倾子资料解释提供参考与依据。

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	刘彦涛
	彭莉红
	孙栋华
	张伟盟
	王海红

关键词 ：倾子, 航空大地电磁, 三维有限元, ZTEM

Abstract：

Tippers are important parameters for the interpretation of airborne magnetotelluric data, and the study on the response characteristics of tippers is of great significance for the data interpretation. This study firstly introduces the basic principle of airborne magnetotelluric and ZTEM airborne magnetotelluric data acquisition system, then simulates the tipper response of the simple abnormal bodies using the three-dimensional finite element method, and finally analyzes the response characteristics of tippers T_x and T_y when the survey lines obliquely intersect with a lithologic interface. As indicated by the results, both T_x and T_y responded to the lithological interface in the case that the survey lines obliquely intersected with a lithologic interface. Meanwhile, the tipper exhibited corresponding laws with the change in the direction of the survey lines in that case. This study further deepens the understanding of the response of tipper to lithologic interfaces and will provide references and guidance for the interpretation of tipper data.

Key words： tipper airborne magnetotelluric three-dimensional finite element ZTEM

收稿日期: 2020-12-14 修回日期: 2021-07-07 出版日期: 2021-10-20

ZTFLH:

P631

作者简介: 刘彦涛(1994-),男,助理工程师,硕士,主要从事航空电磁、航磁勘查研究工作。Email: liuyantao703@163.com

引用本文:

刘彦涛, 彭莉红, 孙栋华, 张伟盟, 王海红. 基于三维有限元的航空大地电磁倾子响应特征[J]. 物探与化探, 2021, 45(5): 1329-1337.
LIU Yan-Tao, PENG Li-Hong, SUN Dong-Hua, ZHANG Wei-Meng, WANG Hai-Hong. Research on response characteristics of airborne magnetotelluric tipper based on three-dimensional finite element. Geophysical and Geochemical Exploration, 2021, 45(5): 1329-1337.

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https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2021.1566 或 https://www.wutanyuhuatan.com/CN/Y2021/V45/I5/1329

Fig.1 ZTEM系统

Fig.2 频率-趋肤深度曲线

Fig.3 模型网格剖分示例

Fig.4 复杂地质模型示意

Fig.5 2个典型频率的磁场三分量变化趋势

Fig.6 三维模型示意

Fig.7 测线走向示意

Fig.8 测线a倾子低阻响应特征

Fig.9 测线b倾子低阻响应特征

Fig.10 测线c倾子低阻响应特征

Fig.11 测线a倾子高阻响应特征

Fig.12 测线b倾子高阻响应特征

Fig.13 测线c倾子高阻响应特征

[1]	朴化荣. 电磁测深法原理[M]. 北京: 地质出版社, 1990.
[1]	Pu H R. Principle of electromagnetic Sounding [M]. Beijing: Gology Press, 1990.
[2]	张铭, 刘长胜, 康利利, 等. 基于航空大地电磁倾子特征的二维大地结构探测方法[J]. 地球物理学进展, 2018, 33(3):1303-1312.
[2]	Zhang M, Liu C S, Kang L L, et al. Two-dimensional ground Structure detection method based on the tipper characteristics of airborne magnetotelluric[J]. Progress in Geophysics, 2018, 33(3):1303-1312.
[3]	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.
[3]	Xu Z B, Tan H D. Two-dimensional nonlinear conjugate gradient inversion of ZTEM[J]. Geophysical and Geochemical Exploration, 2019, 43(2):393-400.
[4]	姚志勇, 孟祥连, 杜世回, 等. 川藏铁路昌都至林芝段色季拉山隧道航空物探试验研究[J]. 隧道建设, 2021, 41(2):248-257.
[4]	Yao Z Y, Meng X L, Du S H, et al. Experimental study on aerogeophysical prospecting of Shergyla mountain tunnel on Changdu-Nyingchi section of Sichuan-Tibet railway[J]. Tunnel Construction, 2021, 41(2):248-257.
[5]	石连成, 骆燕, 江民忠, 等. 辽东半岛五龙金矿床航空电磁场特征及找矿意义[J]. 地质学报, 2020, 94(10):3106-3119.
[5]	Shi L C, Luo Y, Jiang M Z, et al. Characteristics of aero-electromagnetic field and its prospecting significance in the Wulong gold deposit, Liaodong Peninsula[J]. Acta Geologica Sinica, 2020, 94(10):3106-3119.
[6]	Keeva V. The magnetotelluric method in the exploration of sedimentary basins[J]. Geophysics, 1972, 37(1):98-141. doi: 10.1190/1.1440255
[7]	Wang T, Tan H D, Li Z Q, et al. 3D finite-difference modeling algorithm and anomaly feature of ZTEM[J]. Applied Geophysics, 2016, 13(3):553-560. doi: 10.1007/s11770-016-0566-9
[8]	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
[9]	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.
[9]	Hu W B, Su Z L, Chen Q L, et al. Character of tipper data and the application[J]. Oil Geophysical Prospecting, 1997, 32(2):202-213.
[10]	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, 11(4):626-636.
[10]	Chen X B, Zhao G Z, Zhan Y, et al. Analysis of tipper visual vectors and its applocation[J]. Earth Science Frontiers, 2004, 11(4):626-636.
[11]	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.
[11]	Chen Q L, Hu W B, Li J M, et al. Characteristics of tipper response of buried sphere[J]. Journal of Oil and Gas Technology (J.JPI), 2007, 29(3):75-78.
[12]	李赓, 曹飞翔, 李万开. 航空大地电磁响应特征分析及反演研究[J]. 物探化探计算技术, 2021, 43(2):224-231.
[12]	Li G, Cao F X, Li W K. Analysis of response characteristics and research of inversion of airborne magnetotelluric[J]. Computing Techniques for Geophysical and Geochemical Exploration, 2021, 43(2):224-231.
[13]	童孝忠, 柳建新, 刘颖, 等. 利用有限单元法模拟二维MT倾子响应[J]. 吉林大学学报:地球科学版, 2011, 41(s1):349-354.
[13]	Tong X Z, Liu J X, Liu Y, et al. Calculating tipper response in two-dimensional magnetotelluric using finite element method[J]. Journal of Jilin University:Earth Science Edition, 2011, 41(s1):349-354.
[14]	潘伟, 肖晓, 王永明. 倾子资料特征分析研究[J]. 地球物理学进展, 2015, 30(6):2741-2748.
[14]	Pan W, Xiao X, Wang Y M. Research on the character of tipper data[J]. Progress in Geophysics, 2015, 30(6):2741-2748.
[15]	童孝忠, 吴思洋, 谢维. 基于有限差分法的大地电磁二维倾子响应计算[J]. 工程地球物理学报, 2018, 15(4):485-491.
[15]	Tong X Z, Wu S Y, Xie W. The tilting respinse calculation of magnetolluric two-dimension based on finite difference method[J]. Chinese Journal of Engineering Geophysics, 2018, 15(4):485-491.
[16]	池昌峰, 袁丽伟, 杨永龙, 等. 大地电磁测深法(MT)二维倾子正演研究[J]. 水利科技与经济, 2019, 25(1):43-51.
[16]	Chi C F, Yuan L W, Yang Y L, et al. Research on the forward calculation of two-dimensional magnetotelluric tipper[J]. Water Conservancy Science and Technology and Economy, 2019, 25(1):43-51.
[17]	甘佳雄. MT倾子响应的有限元模拟及影响因素分析[D]. 长沙:中南大学, 2012.
[17]	Gan J X. Finite element simulation and analysis of influence factors of MT tipper response[D]. Changsha: Central South University, 2012.
[18]	吴頔, 严家斌, 贺文根. 倾子对异常体的分辨能力及影响因素研究[J]. 地球物理学进展, 2012, 27(6):2656-2663.
[18]	Wu D, Yan J B, He W G. Study on distinguishing to anomalous bodies by tipper and influencing factor of tipper[J]. Progress in Geophysics, 2012, 27(6):2656-2663.
[19]	徐凌华, 甘佳雄, 柳建新, 等. MT倾子响应的影响因素分析[J]. 物探化探计算技术, 2013, 35(4):430-434,371-372.
[19]	Xu L H, Gan J X, Liu J X, et al. The analysis of influence factors of MT tipper response[J]. Computing Techniques for Geophysical and Geochemiacl Exploration, 2013, 35(4):430-434,371-372.
[20]	李志强. ZTEM三维正反演研究[D]. 北京:中国地质大学(北京), 2016.
[20]	Li Z C. Research on ZTEM Three-dimensional Forward Modeling and Inversion [D]. Beijing: China University of Geoscience (Beijing), 2016.

[1]	田郁, 乐彪. 复杂异常体模型下的三维MT倾子正演模拟[J]. 物探与化探, 2021, 45(4): 1021-1029.
[2]	李志强, 孙洋, 谭捍东, 张承客. 带地形的ZTEM倾子资料三维正反演研究[J]. 物探与化探, 2021, 45(3): 758-767.
[3]	王志宏, 江民忠, 彭莉红, 程莎莎. 航空大地电磁法在辽宁省丹东地区的应用[J]. 物探与化探, 2020, 44(4): 734-741.
[4]	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.
[5]	田郁, 胡祥云, 乐彪. 倾子在地球物理断裂构造解释中的应用[J]. 物探与化探, 2018, 42(6): 1237-1244.
[6]	赵丛, 朱琳, 李怀渊, 江民忠, 骆燕, 张伟, 何昕欣. 航空和地面天然场电磁法联合开展深部矿产资源勘探[J]. 物探与化探, 2016, 40(2): 333-341.
[7]	李长伟, 熊彬, 吕玉增. 电法测井的三维有限元模拟[J]. 物探与化探, 2012, 36(4): 585-590.

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