三维地震数据AVO处理方法

AVO processing methods for 3-D seismic data

目前二维AVO方法应用比较多。三维AVO处理的困难主要在于数据量庞大,在不同的偏移距上,三维地震道分布密度不同。诸如此类的问题影响了AVO在三维资料处理中的推广和应用。通过对Zoeppritz方程作线性变换,可以使三维AVO方法便捷地应用于储层预测。先用庞大的叠前数据分别形成远近偏移距的叠加数据,再进行AVO处理。理论和运算结果都表明,该方法能有效地预测储层特性,具有一定的推广和实际利用价值。

2-D AVO methods have been used widely nowadays, but 3-D AVO processing is suffered from huge data volume and ununiformity of trace distribution density for different offsets. These problems impede the application and popularization of AVO methods in 3-D data processing. This paper discusses a method that facilitates the application of 3-D AVO methods in reservoir prediction through Zoeppritz equation linear transform. We first form stacked data of both far and near offset with pre-stack data, and then perform AVO processing. The feasibility and effectiveness of the method in reservoir prediction is demonstrated by both theoretical analysis and real calculation.