3D seismic geometry design based on ore-stack imaging
基于叠前成像的三维地震观测系统设计

The main objective of conventional 3D seismic geometry design is to obtain regularly sampled stacking dataset, which can be used to achieve good images through post-stack migration. However, pre-stack migration has strict requirements on seismic geometries. In order to exert the technical advantages of pre-stack migration and improve the accuracy of seismic images, it is very important to design seismic geometries based on pre-stack imaging. This article puts forward an approach of seismic geometry design based on pre-stack imaging. The first step is to design the basic spatial sampling of seismic geometry based on the anti-aliasing criteria of pre-stack migration. The second is to design the layout of seismic geometry according to the rule of regular sampling and uniform bin attributes. Then, it optimizes step by step and finalizes seismic geometry by using techniques such as focal beams, pre-stack migration response of scatter point, forward modeling, and wavefield illumination. This method has been applied to high accuracy seismic exploration of the Zhongyuan Oilfield in recent years and it has obtained very good results.