各向异性叠前时间偏移技术在大庆探区的应用
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摘要
各向异性叠前时间偏移技术不仅消除了介质各向异性地震成像精度的影响,而且能够解决叠前反演共反射点道集大炮检距数据校正过量的问题。本文介绍了VTI介质三维各向异性叠前时间偏移方法的基本原理、实现过程和技术关键,以及在大庆探区的应用效果。结果表明应用各向异性叠前时间偏移技术可使地震资料的成像精度得到较大幅度的提高,断点归位更加清楚准确,断层清晰,地震资料的横向分辨率得到进一步提高。
The anisotropic pre-stack time migration technique not only eliminated the influence of medium anisotropy to the imaging accuracy,but also could solve the over correlation problem for the large offset data in the common reflection point gathers during pre-stack migration process.The basic principle,the realization process,the key techniques and the application results in Daqing exploration area of 3D anisotropic pre-stack time migration technique in the VTI medium were introduced in this paper.The research results show that application of the new technique could greatly improve the imaging accuracy,after migration the fault points are clearer and more accurate,the faults are more visible,and the horizontal resolution of the seismic data was further raised.
The anisotropic pre-stack time migration technique not only eliminated the influence of medium anisotropy to the imaging accuracy,but also could solve the over correlation problem for the large offset data in the common reflection point gathers during pre-stack migration process.The basic principle,the realization process,the key techniques and the application results in Daqing exploration area of 3D anisotropic pre-stack time migration technique in the VTI medium were introduced in this paper.The research results show that application of the new technique could greatly improve the imaging accuracy,after migration the fault points are clearer and more accurate,the faults are more visible,and the horizontal resolution of the seismic data was further raised.
引文
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[2]徐亦鸣,黄中玉,刘路佳.各向异性介质纵波速度分析.石油物探,2004,43(5):438～528
[3]Alkhalifah T.Kirchhoff ti me migrationfortransversely isotropic media:An application to Trinidad data.Geo-physics,2006,71(1):29～35
[4]Alkhalifah T and Tsvankin I.Velocity analysis for transversely isotropic media.Geophysics,1995,60(5):1550～1566
[2]徐亦鸣,黄中玉,刘路佳.各向异性介质纵波速度分析.石油物探,2004,43(5):438～528
[3]Alkhalifah T.Kirchhoff ti me migrationfortransversely isotropic media:An application to Trinidad data.Geo-physics,2006,71(1):29～35
[4]Alkhalifah T and Tsvankin I.Velocity analysis for transversely isotropic media.Geophysics,1995,60(5):1550～1566
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