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Seismic wave migration by 15 degree migration difference method
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Application background 15. Finite difference migration method based on wave equation and simplified wave equation difference. Realization of seismic wave migration by 15 degree shift difference method. The seismic reflection method is according to the on the ground in a certain way of elastic wave excitation, and in the ground (aperture) recorded from the subsurface elastic boundary reflection waves of underground geological formations and physical characteristics of a method. Key Technology This code is based on the wave equation or the simplified wave equation difference method. Commonly used a 15 degree difference method and a 45 DEG... 15 degrees time migration equation for type C as velocity, tau is expressed in the two-way time depth, t, X and P see "prestack partial migration" conditions.
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Kirchhoff post stack migration C + + code
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Application background With improvement of the accuracy of seismic exploration, effect of anisotropy for the conventional Kirchhoff prestack depth migration effect can not be ignored. Studies using P-wave nonhyperbolic reflection travel calculating method of anisotropic parameters, sway sets the array length is much larger than that of the exploration target layer depth, the P wave travel time data contains the information can be used to determine the anisotropy parameters of VTI media Key Technology Using VTI medium CMP set, the two-step extraction method of ETA parameters, first using short array seismic data to obtain RMS moveout velocity, using long array data and the horizontal velocity of the scanning method to obtain the horizontal velocity, anisotropy ETA parameters are obtained through the conversion; based on acoustic approximation in VTI media is the eikonal equation, through anisotropic ray tracing computation of travel
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