对数拉伸DMO方法在逆掩推覆构造中应用研究(英文)
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摘要
在地下构造复杂、断层发育地层中,常规水平叠加方法效果差,而常规的DMO算法计算效率低,实用性差。这篇文章通过对时间轴引用对数拉伸变换以提高计算速度和成像质量,运用DMO对数拉伸校正方法,对逆掩推覆构造物理模拟资料和实际资料进行了处理分析。DMO对数拉伸方法比常规水平叠加方法效果好,增强了断面反射,在倾斜地层和复杂构造地层中能更好地进行同相叠加,更加有利于逆掩推覆构造区地震资料成像,更有实用性。
For strata with complex structure and faulting, the conventional horizontal stack method can not provide a high quality image and the conventional DMO technique has low computational efficiency and practicability. This article studies a logarithm stretching DMO method in the time domain to accelerate the computational speed as well as improve the image quality. It also covers the processing of physical model and real data using the logarithm stretching DMO algorithms. The logarithm stretching DMO method can produce reflections from faults and implements the in-phase stack of dipping layers and complicated structures better than the conventional horizontal stack method. So this method has better application to thrust-nappe areas.
For strata with complex structure and faulting, the conventional horizontal stack method can not provide a high quality image and the conventional DMO technique has low computational efficiency and practicability. This article studies a logarithm stretching DMO method in the time domain to accelerate the computational speed as well as improve the image quality. It also covers the processing of physical model and real data using the logarithm stretching DMO algorithms. The logarithm stretching DMO method can produce reflections from faults and implements the in-phase stack of dipping layers and complicated structures better than the conventional horizontal stack method. So this method has better application to thrust-nappe areas.
引文
Black, J. L., Schleicher, K. L., and Zhang, L., 1993, Trueamplitude imaging and dip moveout Geophysics, 8,47-66.
Bolondi, B., Fomel, S., and Chemingui, N., 1998,Azimuth moveout for 3-D prestack imaging Geophysics, 3, 574 - 588.
Geng Jinhua and Ma Zaitian, 1994, Fast DMO algorithm Oil Geophysics rospecting, 1 , 462-467.
Hale, D. A., 1984, Dip moveout by Fourier transform Geophysics, 4 , 741-757.
Hale, D. A., 1991, A nonaliased integral method for dip moveout Geophysics, , 795 - 805.
Liner, C. L., 1990, General theory and comparative anatomy of dip moveout Geophysics, , 595 – 607.
Ning Junrei, Zhang Yaqin, and Fan Jiafang, 2002, The application of Kirchhoff three-dimensional DMO stacking to the processing of seismic data Geophysical & Geochemical Exploration, 2 , 46 – 49.
Wang Huazhong, Xu Weiya, Xu Zhaotao, Kuang Bin, and Ma Zaitian, 2002, The same start of DMO and prestack time migration Oil Geophysics rospecting, 37, 224 - 229.
Yang Haisheng, 2002, Accurate logarithmic stretching DMO Geophysical rospecting for etroleum, 21, 475 – 478.
Bolondi, B., Fomel, S., and Chemingui, N., 1998,Azimuth moveout for 3-D prestack imaging Geophysics, 3, 574 - 588.
Geng Jinhua and Ma Zaitian, 1994, Fast DMO algorithm Oil Geophysics rospecting, 1 , 462-467.
Hale, D. A., 1984, Dip moveout by Fourier transform Geophysics, 4 , 741-757.
Hale, D. A., 1991, A nonaliased integral method for dip moveout Geophysics, , 795 - 805.
Liner, C. L., 1990, General theory and comparative anatomy of dip moveout Geophysics, , 595 – 607.
Ning Junrei, Zhang Yaqin, and Fan Jiafang, 2002, The application of Kirchhoff three-dimensional DMO stacking to the processing of seismic data Geophysical & Geochemical Exploration, 2 , 46 – 49.
Wang Huazhong, Xu Weiya, Xu Zhaotao, Kuang Bin, and Ma Zaitian, 2002, The same start of DMO and prestack time migration Oil Geophysics rospecting, 37, 224 - 229.
Yang Haisheng, 2002, Accurate logarithmic stretching DMO Geophysical rospecting for etroleum, 21, 475 – 478.
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