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海底多波多分量地震资料 ,能够提供含气高压地层的地质信息 ,提高AVO反演岩性参数的可靠性。应用计算反射系数的Zoeppritz方程 ,实施海底多波多分量数据的弹性参数的多尺度AVO反演。考虑的弹性参数是介质两侧速度及密度比 ,在时空域内建立多波AVO联合反演的目标函数 ;应用小波多尺度分析 ,对目标函数进行多尺度分解 ,并通过奇异值分解 (SVD)实现每一尺度内极值点的弹性参数求解 ;采用剥层法逐层多尺度反演多个地层弹性参数。合成及实测数据的试算结果表明 ,该方法不仅稳定性高 ,抗干扰性强 ,而且速度快、精度高
Seawater multi-wave multi-component seismic data can provide geological information of gas-bearing and high-pressure strata and improve the reliability of lithology parameters of AVO inversion. Applying the Zoeppritz equation to calculate the reflection coefficient, multiscale AVO inversion of the elastic parameters of seafloor multi-wave and multi-component data is carried out. The elastic parameter considered is the objective function of multi-wave AVO joint inversion in the space-time domain, which is the velocity and density ratio of the two sides of the medium. Multi-scale decomposition of the objective function is carried out by using wavelet multi-scale analysis, and the singular value decomposition (SVD) The elastic parameters of the extremum points are solved for each scale. Multi-scale inversion of multi-scale elastic parameters is carried out by layering method. The experimental results of synthetic and measured data show that this method not only has high stability and strong anti-interference, but also has the advantages of fast speed and high precision