【摘要】 基于Chapman岩石物理模型,对第三类AVO类型进行频率依赖性分析。并将频谱分解技术与AVO技术结合起来,将反射系数替代为不同频率的振幅谱,将振幅谱视为频率的函数,对Smith&Gidlow近似式进行扩展,给出一种新的描述地震波频散程度的属性的计算公式与方法。并用模型和实际地震资料频散属性的计算。研究结果表明:频散模型和弹性模型的频散属性有明显差异,频散属性可以作为一种含气储层的指示剂。更多还原

【Abstract】 Frequency-dependent characteristics of a class 3 AVO model were performed using Chapman rock physical model. Treating the spectral amplitude as reflective coefficients, a new seismic attribute for the description of seismic dispersion was presented by extending Smith & Gidlow’s formula in frequency domain. Then the method was used for synthetic model and real seismic data processing. The results show that dispersion properties obtained by frequency-dependent inversion can be used as the indicator for hydrocarbon detection, because it is very different in elasticity situation and dispersion situation.更多还原