一种改进型C3相干算法
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摘要
基于特征值结构的相干体算法(C3算法)的核心思想就是用与水平时间切片的相关的相干值压制水平方向上介质连续性,凸显不连续性,因此具有最佳的横向(即水平)分辨率,而对倾角数据效果较差。为了改善倾向分辨率,本文提出一种用测线抽取数据进行计算的方式取代基本算法中面元抽取数据计算的方式。试算结果表明该算法真实有效,精度有较大的提高。
As a method of coherence algorithm based on eigenstructure,the core of C3 algorithmitsis suppressing continuity and emphasizing discontinuity of underground media by computing the coherence of time slices,and finally obtains both higher lateral resolution and lower dip resolution.To improve dip resolution,an improved C3 method,with computing covariance matrix by survey line instead of dealing with sliding panels is presented.The results show the new method has better resolution both in horizon and dip direction.
As a method of coherence algorithm based on eigenstructure,the core of C3 algorithmitsis suppressing continuity and emphasizing discontinuity of underground media by computing the coherence of time slices,and finally obtains both higher lateral resolution and lower dip resolution.To improve dip resolution,an improved C3 method,with computing covariance matrix by survey line instead of dealing with sliding panels is presented.The results show the new method has better resolution both in horizon and dip direction.
引文
[1]Bahorich M,Farmer S L.3-D Seismic Discontinuity for Faultsand Stratigraphic Features:The Coherence Cube[J].TheLeading Edge,1995,14(10):1053-1058.
[2]Marfurt K J,Kirlin R L,Farmer S L,et al..3-D Seismic At-tributes Using a Semblance Based Coherency Algorithm[J].Geophysics,1998,63(4):1150-1165.
[3]Taner M T,Koehler F.Velocity spectra-digital computer deri-vation and applications of velocity functions[J].Geophysics,1969,34:859-881.
[4]Landa E,Thore P,Reshef M.Model-based stack:A methodfor constructing an accurate zero-offset section for complex o-verburdens[J].Geophysics.Prosp,1993,41:661-670.
[5]Gersztenkorn A,Marfurt K J.Eigenstructure-Based Coher-ence Comput-ations as an Aid to 3-D Structural and Strati-graphic Mapping[J].Geophysics,1999,64(5):1468-1479.
[6]佘德平,曹辉,郭全仕.应用三维相干技术进行精细地震解释[J].石油物探,2000,39(2):83-88.
[7]Ashbridge J,Pryce C,Coutel F.Fault and Fracture Predic-tion from Coherence Data Analysis.A Case Study:The MagnusField,UKCS[J].SEG Technical Program Expanded Ab-stracts,2000,19:1564-1567.
[8]Neves F A,Zahrani M S,Bremkamp S W.Detection of Po-tential Fractures and Small Faults Using Seismic Attributes[J].TLE,2004,23(9):903-906.
[9]王德利,雍运动,韩立国,等.三维粘弹介质地震波场有限差分并行模拟[J].西北地震学报,2007,29(1):30-34.
[10]刘前坤,韩立国,廉玉广,等.基于等效Thomsen参数的P-SV波AVO属性研究[J].西北地震学报,2008,30(3):214-220.
[11]黄翼坚.非均匀TI介质P-SV波传播交错网格高阶有限差分数值模拟[J].西北地震学报,2008,30(1):11-16.
[2]Marfurt K J,Kirlin R L,Farmer S L,et al..3-D Seismic At-tributes Using a Semblance Based Coherency Algorithm[J].Geophysics,1998,63(4):1150-1165.
[3]Taner M T,Koehler F.Velocity spectra-digital computer deri-vation and applications of velocity functions[J].Geophysics,1969,34:859-881.
[4]Landa E,Thore P,Reshef M.Model-based stack:A methodfor constructing an accurate zero-offset section for complex o-verburdens[J].Geophysics.Prosp,1993,41:661-670.
[5]Gersztenkorn A,Marfurt K J.Eigenstructure-Based Coher-ence Comput-ations as an Aid to 3-D Structural and Strati-graphic Mapping[J].Geophysics,1999,64(5):1468-1479.
[6]佘德平,曹辉,郭全仕.应用三维相干技术进行精细地震解释[J].石油物探,2000,39(2):83-88.
[7]Ashbridge J,Pryce C,Coutel F.Fault and Fracture Predic-tion from Coherence Data Analysis.A Case Study:The MagnusField,UKCS[J].SEG Technical Program Expanded Ab-stracts,2000,19:1564-1567.
[8]Neves F A,Zahrani M S,Bremkamp S W.Detection of Po-tential Fractures and Small Faults Using Seismic Attributes[J].TLE,2004,23(9):903-906.
[9]王德利,雍运动,韩立国,等.三维粘弹介质地震波场有限差分并行模拟[J].西北地震学报,2007,29(1):30-34.
[10]刘前坤,韩立国,廉玉广,等.基于等效Thomsen参数的P-SV波AVO属性研究[J].西北地震学报,2008,30(3):214-220.
[11]黄翼坚.非均匀TI介质P-SV波传播交错网格高阶有限差分数值模拟[J].西北地震学报,2008,30(1):11-16.
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