Journal of Jilin University(Earth Science Edition) ›› 2018, Vol. 48 ›› Issue (3): 881-889.doi: 10.13278/j.cnki.jjuese.20170042

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Estimates of Seismic Reflector Dip by Adaptive Weighted Generalized Inverse Vector Direction Filter

Liu Mingchen, Sun Jianguo, Han Fuxing, Sun Zhangqing, Sun Hui, Liu Zhiqiang   

  1. College of GeoExploration Science and Technology, Jilin University, Changchun 130026, China
  • Received:2017-09-07 Online:2018-05-26 Published:2018-05-26
  • Supported by:
    Supported by National Natural Science Foundation of China (41274120,41404085,41504084)

Abstract: It's difficult to estimate a seismic reflector dip at discontinuities. Many seismic attributes such as reflector dip change fast at faults, geological boundaries and so on. To overcome this problem, we explored an adaptive weighted generalized inverse vector direction filter to smooth the gradient vector field to estimate a local seismic reflector dip. The method is as below:at first, to compute the gradient vector field by a modified finite-difference method; and then to set the reference direction to vertical downward and invert the opposite vectors to the reference direction; at last, to estimate the seismic reflector dip by the adaptive weighted generalized inverse vector direction filter. This method can estimate a seismic reflector dip robustly and efficiently with high-resolution at discontinuities, while the conventional methods may fail. Both of the synthetic and real data examples demonstrated the effectiveness and efficiency of our method for estimating seismic reflector dips with high-resolution.

Key words: seismic dip, vector filter, finite difference, gradient vector, structure protect

CLC Number: 

  • P631.4
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