【摘要】：位場是由地下密度不均勻或磁性不均勻地質(zhì)體引起的疊加場,是一種體積效應,具有一定的復雜性,使得異常分離顯得尤為重要。異常分離技術(shù)則是分異的基本手段。本論文在傅氏變換的基礎上,首先對以維納濾波原理的維納濾波器和匹配濾波器,以及根據(jù)平面等值線圖上異常的規(guī)模和強度來構(gòu)制的寬度幅值特征濾波器進行了研究。利用三種濾波技術(shù)分別對三球模型和五方體模型進行了濾波處理,得出了不同算法下的分離場。然后利用匹配濾波和寬度幅值特征濾波對西藏某工區(qū)的實際重磁資料進行了處理,得出的局部場和區(qū)域場較好的反映了淺部和深部的地質(zhì)情況。利用匹配濾波技術(shù)對四川某工區(qū)的實際重力資料進行了分析,得出的局部場較好的反映了淺部的地質(zhì)體大致范圍。利用雙譜的特性檢測到在高噪聲中的有用信號。利用時-頻分析技術(shù)來分析和判斷由地質(zhì)體產(chǎn)生的頻率隨距離的變換關系。分別處理和分析了多方體、多球體和多板體模型在距離-頻率曲線上的變化關系和特征。利用不同地質(zhì)體在剖面上的不同距-頻特征來判斷識別不同組合模型的形態(tài)、邊界和大小。然后對四川某工區(qū)的兩條剖面進行了距-頻分析,初步劃定了地質(zhì)體的邊界和形態(tài)。
[Abstract]:The potential field is a superposition field caused by the underground density inhomogeneity or magnetic heterogeneity. It is a volume effect and has some complexity, which makes the abnormal separation more important. Anomaly separation technology is the basic means of differentiation. On the basis of Fourier transform, this paper first studies Wiener filter and matched filter based on Wiener filter principle, and the width amplitude characteristic filter constructed according to the abnormal scale and intensity of plane isoline map. Three kinds of filtering techniques are used to filter the three-sphere model and the pentagonal model, and the separation fields under different algorithms are obtained. Then the actual gravity and magnetic data of a certain working area in Tibet are processed by using matched filtering and width amplitude characteristic filtering. The local and regional fields can well reflect the geological conditions in shallow and deep areas. The actual gravity data of a certain working area in Sichuan Province are analyzed by using the matched filtering technique, and the local field can well reflect the general range of the shallow geological body. Bispectral characteristics are used to detect useful signals in high noise. The time-frequency analysis technique is used to analyze and judge the relationship between frequency and distance generated by geological bodies. The relationship and characteristics of multi-body, multi-sphere and multi-plate models on the distance-frequency curve are analyzed and processed respectively. The shape, boundary and size of different combination models are identified by using the different distance and frequency characteristics of different geological bodies in the profile. Then, the distance frequency analysis of two sections in a working area of Sichuan Province is carried out, and the boundary and shape of geological body are preliminarily delineated.
【學位授予單位】：成都理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P631

【引證文獻】

相關會議論文 前2條

1 石殿祥;陳樹凱;鄭天才;任義慶;;用高階統(tǒng)計量估算非最小相位地震子波[A];1998年中國地球物理學會第十四屆學術(shù)年會論文集[C];1998年

2 王家映;;高階統(tǒng)計量在大地電磁資料處理中的應用研究[A];2001年中國地球物理學會年刊——中國地球物理學會第十七屆年會論文集[C];2001年

，

本文編號：2283575