Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Progress in Geophysics》 2008-02
Add to Favorite Get Latest Update

The DCT method of identifying faulted structures

ZHANG Feng-Xu1,ZHANG Feng-Qin1,2,MENG Ling-Shun1(1.College of Geo-Exploration Science and Technology,Jilin University,Changchun 130026,China;2.College of Physics,Jilin University,Changchun 130023,China)  
The paper proposes an inversion method that determines locations of faulted structures using the Euler deconvolution(Euler method)based on discrete cosine transform(DCT)to improve the inversion precision of Euler's method.We give the Euler's homogeneity equation based DCT and point out that the calculating accuracy of gravity anomalies derivatives is significant question which influence the inversion precision of Euler method.Experiments of step models show that the maximum error and standard deviation of vertical first derivative calculated by DCT are 0.460×10-9/s2 and 0.189×10-9/s2 respectively,and that of horizontal first derivative are 0.182×10-9/s2 and 0.028×10-9/s2.It is demonstrated that the accuracy of gravity anomalies derivatives calculated by DCT is excellent to compare with DFT.Through computing for forward models,we determine that the locations inversed by Euler method based on DCT are center of fractured surface of steps,in which the points is consistent with theoretical locations.It is shown in the experiment of inversion models that the precisions inversed by DCT method are very high,and validated in the practical application that the method is feasible,practicable and veracious.
【Fund】: 国家自然科学基金重点联合基金项目(40739905);; 国家油气选区专项(XQ-2007-07)联合资助
【CateGory Index】: P542
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved