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AVO属性交绘图是解释岩性和孔隙流体异常的一个十分重要的工具。与其他的交绘图有所不同,AVO理论分析中包含了横波的信息,这就相当于纵、横波联合反演。文章利用垂直入射反射率和泊松反射率交绘图,使不同S iO2含量的岩石落在交绘图的不同位置,成功的区分了中下地壳变质岩的基性。
AVO attribute cross-mapping is a very important tool to explain the abnormalities of lithology and pore fluid. Different from other crossplotting, the AVO theoretical analysis includes the information of transverse waves, which is equivalent to the joint inversion of longitudinal and transverse waves. In this paper, the vertical incidence reflectance and the Poisson reflectance are used to make the rocks with different S iO2 contents fall into different positions of the cross-map, and the distinction between the basic characteristics of the middle and lower crustal metamorphic rocks has been successfully made.