Method for determining anisotropic parameters by utilizing data of three-dimensional VSP (Vertical Seismic Profile)
A technology of vertical seismic section and anisotropy, which is applied in the field of vertical seismic section exploration, can solve the problems affecting the quality of seismic imaging, the change of motion correction time difference, etc., and achieve the goal of eliminating the influence of seismic anisotropy, improving precision and improving accuracy rate Effect
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[0043] For the anisotropic medium of VTI, the ray bending phenomenon (such as figure 1 As shown in (a), the resulting dynamic correction time difference problem with the well source distance (or offset distance) changes (such as figure 1 As shown in (b), the HTI anisotropic medium will cause different ray bending phenomena when seismic waves propagate in different directions (such as figure 2 As shown in (a), the resulting motion correction time difference problem with the change of azimuth angle (such as figure 2 (b) shown). The present invention proposes a processing method for obtaining VTI anisotropic medium parameters and HTI anisotropic medium parameters based on three-dimensional VSP data. Correction of anisotropic media eliminates the problem of seismic wave propagation time difference caused by anisotropic media, improves the accuracy of seismic imaging, and provides an effective new technology for pre-stack inversion of complex lithology reservoirs and prediction...
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