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瑞利波和导波是明显且普遍存在的震源产生的地震噪声。这些噪声对高分辨率地震成像造成严重问题。在泊松比较高的地区,导波可以当成是封闭在地表和地下第一主要地震不连续面之间的伪声波。瑞利波和导波在性质上都是频散的,而且分别对横波和纵波速度结构敏感,我们提出一种允许我们从这些波中提取地下最浅层速度信息的反演方法。在这些地区传统的地震反射技术效果很差。这种方法通过对瑞利波和导波的频散特性的联合反演,利用包含其中的补充信息。这种反演的可行性根据实际地震模型的合成数据进行测试和验证。
Rayleigh waves and guided waves are the seismic noise produced by obvious and ubiquitous sources. These noises pose serious problems for high-resolution seismic imaging. In areas of high Poisson’s ratio, the guided wave can be regarded as a pseudo-sound wave that is enclosed between the surface and the first major seismic discontinuity in the ground. Rayleigh waves and guided waves are both dispersive in nature and are sensitive to both S-wave and P-wave velocity structures, respectively. We propose an inversion method that allows us to extract the most superficial velocity information from these waves. The traditional seismic reflection technology in these areas is ineffective. This method utilizes the complementary information contained in the joint inversion of the dispersion characteristics of the Rayleigh wave and the guided wave. The feasibility of this inversion is tested and verified against the synthetic data of the actual seismic model.