基于磁異常的目標體定位反演方法研究
發(fā)布時間：2019-03-07 14:03
【摘要】：磁法測量是一種應用較為廣泛的地球物理勘探方法，可以測量總場及其在笛卡爾坐標系下三個方向的梯度張量場，，具有高效率和高精度探測特性。磁梯度張量作為一種新興的地球物理觀測手段逐漸成為磁測技術的研究熱點，其能提供地質(zhì)體在不同方向上的異常信息，可更準確地描述地質(zhì)體的特征。由于磁梯度張量數(shù)據(jù)在磁性目標體不同方向上呈現(xiàn)出的信息量極為豐富，被應用于磁性目標體的識別和定位，例如隱伏地質(zhì)體勘探、UXO探測、反潛等。實現(xiàn)目標體的空間定位，是磁測研究的主要目的之一。通過研究磁總場及其梯度張量場數(shù)據(jù)和相應的反演方法，實現(xiàn)目標體高精度、快速定位。 本論文首先結合當前已有磁測搭載平臺，分析了磁測采集系統(tǒng)的研究進程，分別對航空磁測、海洋磁測、衛(wèi)星磁測及磁梯度張量測量的發(fā)展現(xiàn)狀進行了詳細綜述，評價不同系統(tǒng)間的優(yōu)勢與不足，對比國內(nèi)外研究差距，以提高磁測系統(tǒng)集成能力和目標體探測能力，為更好地利用有效精度內(nèi)的磁測儀器以及實現(xiàn)多手段、多途徑、快速測量提供相關指導。 為更好地研究淺層目標體磁性特征，本文對金山地區(qū)UXO磁測數(shù)據(jù)進行了處理與解釋。研究發(fā)現(xiàn)，中值濾波對在淺層磁異常數(shù)據(jù)處理中效果較好，濾除條帶狀背景噪聲的同時很好地保留了UXO異常體有效信息。再利用Oasis Montaj下的UXParameter Determination模塊對疑似目標體進行定位和標記。利用改進的歐拉反褶積法對抽取出的UXO磁異常進行深度反演，結合解析信號所圈定的UXO異常中心區(qū)域進行約束，計算該區(qū)域內(nèi)反演深度的平均值，提高了反演的準確性。 本文對磁梯度張量單點定位法在噪聲環(huán)境及多目標體條件下定位情況進行了研究，通過對多點定位結果的概率分析可以提高確定目標體定位準確度，有效地解決了高噪聲和多目標體條件下定位結果過于發(fā)散的問題。本文成功將該方法應用在某海域磁測數(shù)據(jù)，準確地定位到水下磁性體的空間位置。 為提高磁梯度張量數(shù)據(jù)的邊界識別的精度，本文采用計算張量特征值及其頻率域垂直導數(shù)的方法，對磁性目標體進行水平定位和邊界識別。通過對比解析信號法、傾斜角法和Theta圖法，該方法所呈現(xiàn)邊界信息更為清晰，在噪聲環(huán)境下適用性強。在安徽廬樅地區(qū)磁異常數(shù)據(jù)處理中，該方法能很好地圈定出了廬樅火山巖盆地的邊界位置。
[Abstract]:Magnetic survey is a widely used geophysical exploration method. It can measure the total field and its gradient tensor field in three directions under Cartesian coordinate system. It has high efficiency and high precision. As a new geophysical observation method, magnetic gradient Zhang Liang has gradually become a research hotspot of magnetic survey technology. It can provide abnormal information of geological bodies in different directions, and can more accurately describe the characteristics of geological bodies. Because the magnetic gradient Zhang Liang data presents abundant information in different directions of magnetic objects, it has been applied to the identification and location of magnetic objects, such as hidden geological body exploration, UXO detection, anti-submarine and so on. It is one of the main purposes of magnetic measurement research to realize the spatial location of the target body. By studying the data of the total magnetic field and its gradient tensor field and the corresponding inversion method, the high precision and fast positioning of the target are realized. Firstly, the research progress of magnetic data acquisition system is analyzed, and the development status of aeromagnetic survey, marine magnetic survey, satellite magnetic survey and magnetic gradient Zhang Liang survey are summarized in detail. The advantages and disadvantages of different systems are evaluated, and the research gaps at home and abroad are compared in order to improve the integration ability of magnetic measurement system and the detection ability of target body, in order to make better use of effective precision magnetic measuring instruments and to realize multi-means and multi-ways. Rapid measurement provides guidance. In order to better study the magnetic characteristics of shallow target body, the UXO magnetic data in Jinshan area are processed and interpreted in this paper. It is found that the median filter has a good effect on the processing of shallow magnetic anomaly data, while filtering the strip background noise, the effective information of the UXO anomaly body is well preserved. Then the UXParameter Determination module under Oasis Montaj is used to locate and mark the suspected target. Using the improved Eulerian deconvolution method, the depth inversion of the extracted UXO magnetic anomaly is carried out. Combined with the constraint of the central region of the UXO anomaly delineated by the analytical signal, the average of the inversion depth in the region is calculated, and the accuracy of the inversion is improved. In this paper, the magnetic gradient Zhang Liang single-point positioning method is studied under the condition of noise and multi-target body. The accuracy of locating target body can be improved by probability analysis of multi-point positioning results. It effectively solves the problem of excessive divergence of location results under the condition of high noise and multi-target. In this paper, the method is successfully applied to the magnetic data of a certain sea area to locate accurately the space position of the underwater magnetic body. In order to improve the accuracy of boundary recognition of magnetic gradient Zhang Liang data, this paper uses the method of calculating Zhang Liang eigenvalue and its vertical derivative in frequency domain to locate and identify magnetic objects horizontally. By comparing analytic signal method, tilt angle method and Theta diagram method, the boundary information presented by this method is more clear and has strong applicability in noisy environment. In the data processing of magnetic anomalies in the Luzong area of Anhui Province, the boundary position of the Luzong volcanic basin can be well delineated by this method.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P631.2
本文編號：2436180
[Abstract]:Magnetic survey is a widely used geophysical exploration method. It can measure the total field and its gradient tensor field in three directions under Cartesian coordinate system. It has high efficiency and high precision. As a new geophysical observation method, magnetic gradient Zhang Liang has gradually become a research hotspot of magnetic survey technology. It can provide abnormal information of geological bodies in different directions, and can more accurately describe the characteristics of geological bodies. Because the magnetic gradient Zhang Liang data presents abundant information in different directions of magnetic objects, it has been applied to the identification and location of magnetic objects, such as hidden geological body exploration, UXO detection, anti-submarine and so on. It is one of the main purposes of magnetic measurement research to realize the spatial location of the target body. By studying the data of the total magnetic field and its gradient tensor field and the corresponding inversion method, the high precision and fast positioning of the target are realized. Firstly, the research progress of magnetic data acquisition system is analyzed, and the development status of aeromagnetic survey, marine magnetic survey, satellite magnetic survey and magnetic gradient Zhang Liang survey are summarized in detail. The advantages and disadvantages of different systems are evaluated, and the research gaps at home and abroad are compared in order to improve the integration ability of magnetic measurement system and the detection ability of target body, in order to make better use of effective precision magnetic measuring instruments and to realize multi-means and multi-ways. Rapid measurement provides guidance. In order to better study the magnetic characteristics of shallow target body, the UXO magnetic data in Jinshan area are processed and interpreted in this paper. It is found that the median filter has a good effect on the processing of shallow magnetic anomaly data, while filtering the strip background noise, the effective information of the UXO anomaly body is well preserved. Then the UXParameter Determination module under Oasis Montaj is used to locate and mark the suspected target. Using the improved Eulerian deconvolution method, the depth inversion of the extracted UXO magnetic anomaly is carried out. Combined with the constraint of the central region of the UXO anomaly delineated by the analytical signal, the average of the inversion depth in the region is calculated, and the accuracy of the inversion is improved. In this paper, the magnetic gradient Zhang Liang single-point positioning method is studied under the condition of noise and multi-target body. The accuracy of locating target body can be improved by probability analysis of multi-point positioning results. It effectively solves the problem of excessive divergence of location results under the condition of high noise and multi-target. In this paper, the method is successfully applied to the magnetic data of a certain sea area to locate accurately the space position of the underwater magnetic body. In order to improve the accuracy of boundary recognition of magnetic gradient Zhang Liang data, this paper uses the method of calculating Zhang Liang eigenvalue and its vertical derivative in frequency domain to locate and identify magnetic objects horizontally. By comparing analytic signal method, tilt angle method and Theta diagram method, the boundary information presented by this method is more clear and has strong applicability in noisy environment. In the data processing of magnetic anomalies in the Luzong area of Anhui Province, the boundary position of the Luzong volcanic basin can be well delineated by this method.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P631.2
【參考文獻】
相關期刊論文 前10條
1 馬國慶;杜曉娟;李麗麗;;利用水平與垂直導數(shù)的相關系數(shù)進行位場數(shù)據(jù)的邊界識別[J];吉林大學學報(地球科學版);2011年S1期
2 詹艷;王繼軍;湯吉;陳小斌;趙國澤;;利用衛(wèi)星探測研究地下結構[J];地球物理學進展;2007年03期
3 王萬銀;;位場解析信號振幅極值位置空間變化規(guī)律研究[J];地球物理學報;2012年04期
4 王金根,龔沈光;基于運動標量磁強計的磁性目標定位問題研究[J];電子學報;2002年07期
5 張昌達;;航空磁力梯度張量測量——航空磁測技術的最新進展[J];工程地球物理學報;2006年05期
6 駱遙;王明;羅鋒;田嵩;;重磁場二維希爾伯特變換——直接解析信號解釋方法[J];地球物理學報;2011年07期
7 李文杰;李軍峰;劉世凱;周乃恩;;自主技術無人機航空物探(磁/放)綜合站研發(fā)進展[J];地球?qū)W報;2014年04期
8 張季生;高銳;李秋生;管燁;彭聰;王海燕;;歐拉反褶積與解析信號相結合的位場反演方法[J];地球物理學報;2011年06期
9 馬國慶;杜曉娟;李麗麗;孟令順;;利用解析信號的水平與垂直導數(shù)進行磁異常的解釋(英文)[J];Applied Geophysics;2012年04期
10 黃臨平,管志寧;利用磁異�？偺荻饶４_定磁源邊界位置[J];華東地質(zhì)學院學報;1998年02期
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