Traditional normal moveout (NMO) method not only suffers from severe stretching distortion on shallow and far offset traces, but also is particularly sensitive to NMO velocity. Based on the latest reflection seismic interferometry, this paper introduces the third-order cumulant in NMO process to solve above-mentioned issues. The method expands the application scope and is a more universal expression of traditional seismic interferometry in theory. This article first provides a rigorous theoretical derivation, then tests and verifies its noise resistance using model data, and finally applies it to field data in western China. The results show that the proposed method solves the problem of stretching distortions in far offset gathers without the need of correction velocity, and has better noise suppression effect compared with other two methods.

传统的动校正方法不仅在浅层和远偏移距道集上存在严重的拉伸畸变, 而且对动校正速度尤为敏感。针对这一问题, 基于最新的反射波地震干涉技术, 提出基于三阶累积量的动校正方法, 拓宽了地震干涉技术的应用范围, 是地震干涉更普适的表达。首先给出严格的理论推导, 证明所提方法的可行性; 然后用模型数据进行测试, 并检验其抗噪性; 最后将其应用于西部地区实际地震数据。模型和实际资料的成功应用表明, 所提方法在不需要动校正速度的情况下, 解决了动校拉伸畸变的问题, 与现有的两种方法相比, 具有更好的噪声压制能力。