各向异性双谱速度分析方法及在泌阳地区的应用

在地震资料实际处理过程中可采用双曲方程进行动校正,但实际地下介质并非均一,存在各向异性,在这种情况下,采用双曲方程进行动校正不能实现高精度动校正,在近偏移距拉平的情况下,远偏移距不能拉平.根据实际存在的问题,阐述了各向异性情况下的速度分析方法-双谱速度分析,提出了更精准的速度求取方法,解决了远偏移距动校畸变的问题.

Anisotropic bispectral velocity analyses and its application in the area of of Biyang area

Under the assumption of horizontal layered media,seismic ray transmission is along the straight line.The hyperbolic equation can be applied in dynamic correction during the actual processing.But actually,subsurface media is not homogeneous and anisotropy may be existed.In this case,it is impossible to achieve high precision dynamic correction by using hyperbolic equation and impossible to flatten far offset under the circumstance of near offset flattening.According to the real existing problems,we described the velocity analysis method-bispectral velocity analysis in the case of anisotropic,put forward a more precise method for velocity calculation and solved the problem of dynamic correction distortion of far offset.