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地震偏移和反演描述的是一类关系密切的处理技术,其目标一致,并以物理学原理为基础.在弹性波地震勘探中,这些处理技术的复杂程度不等,简单的如动校迭加,复杂的如迭代、多维、迭前、非线性反演。根据振幅与炮检距的关系,原则上有可能从P波数据确定出三个弹性参数。这一目的的实现可采用改进后的动校迭加技术及迭前偏移技术。线性波动方程反演技术并不增加处理的复杂性,这类偏移一反演算法的主要部分就是偏移。实际困难仍然很大,一方面是数据质量本身的限制及精度方面的限制,另一方面是算法固有的局限性及精度的限制(我们希望算法是精确的)。此外,还有计算机精度的限制(也许是固有的)。
Seismic migration and inversion are described as a group of closely related processing technologies that are consistent in their objectives and based on the principles of physics. In elastic seismic exploration, the complexity of these processing techniques varies, Superposition, complex, such as iterative, multidimensional, Diego, nonlinear inversion. Depending on the relationship between amplitude and offset, it is in principle possible to determine three elastic parameters from the P-wave data. This purpose can be achieved by using the improved dynamic alignment and prestack migration techniques. The linear wave equation inversion technique does not increase the complexity of the processing. The main part of such an offset-inversion algorithm is the offset. The practical difficulties are still large, on the one hand the limits of data quality and the limits of accuracy, on the other hand the inherent limitations of algorithms and the limits of accuracy (we hope the algorithm is accurate). In addition, there is a limitation of computer accuracy (which may be inherent).