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常规长排列非双曲动校正公式是在VTI介质中得到的,它不能满足任意空间取向TI(ATI)条件下的扩展.本文以VTI介质中非双曲动校正公式为基础,基于我们推导得出的ATI介质中精确四次时差系数解析解和NMO速度解析解,给出ATI介质中长排列优化的非双曲动校正公式.通过与各向异性射线追踪方法计算所得出的“精确走时”结果对比,研究表明优化后的非双曲动校正公式能精确地描述任意强弱、ATI介质中随测线方位变化的走时曲线,可以用来替代耗时、多偏移距、多方位的射线追踪方法正演拟合ATI介质中长偏移距反射走时,为利用非双曲时距的各向异性参数反演提供理论基础性认识。
Conventional long array nonhyperbolic moveout correction formula is obtained in VTI media and it can not satisfy the extension under any space orientation TI (ATI) condition.In this paper, based on the nonhyperbolic moveout correction formula in VTI media, based on our deduction The exact solution of time difference coefficient in four ATI media and the analytical solution of NMO velocity are given, and the non-hyperbolic correction formula for long array optimization in ATI media is given. By using the method of anisotropic ray tracing method, ". The results show that the optimized non-hyperbolic correction formula can accurately describe the arbitrary strength and the travel time curve of ATI media with the change of survey line orientation, which can be used to replace the time-consuming, multi-offset, multi- The ray tracing method forward fitting the long-offset reflection time in ATI medium provides a theoretical basis for the inversion of anisotropic parameters using non-hyperbolic time-distance.