叠前AVO属性的地震岩性学探索与实践研究

自地震沉积学诞生以来,国内众多学者主要的研究方向集中在地震地貌学上,而对于地震岩性学却鲜有研究。以往对于地震岩性的表征技术主要为90°相位化和叠后反演,但在复杂地区这两种方法都存在一定的缺陷。为此,在前期研究中提出了地震岩性体概念：将地震数据转化为有明确岩性意义的地震属性体,来表征地震地貌。重新推导了AVO属性表达式，选择其中新的G属性作为地震岩性体,并在四川盆地中部某研究区取得了较好的应用效果。

Since the seismic sedimentology was born,the studies that lots of scholars did were mainly focusing on the seismic geomorphology.On the contrary,there were few scholars who studied on the seismic lithology.In the past,the technologies of seismic lithology was mainly 90° phase rotation and post-stack inversion,but both of the methods exist some defects when applied to complex areas.The concept named seismic lithology volume has been proposed in early study:it converts seismic data to seismic attribute volume with a clear lithologic significance,and used to characterize the seismic geomorphology.In this article,we restart to derive the expression of AVO attributes and choose the new G-attributes as the seismic lithology volume,and then successfully applied in the middle of Sichuan Basin.