地震勘探观测系统成像效果量化分析

依据三维地震勘探观测系统的对称性、连续性、均匀性和充分性,定性分析观测系统各参数对叠前成像效果的影响,以此优选观测系统相关参数,设计观测系统。但目前这类方法尚未达到量化分析程度。本文使用双聚焦计算方法,基于克希霍夫积分偏移计算原理,以观测系统双聚焦主瓣与最大旁瓣的比值作为成像效果量化分析指标,并通过地质模型和实例资料的应用效果验证了该方法的有效性,为三维地震勘探观测系统及其参数的优选与设计提供了一种新的量化分析法。

Seismic acquisition geometry quantitative analysis for prestack data imaging quality

In order to have high quality seismic imaging, some analysis approaches of seismic data acquisition geometry parameter influences on prestack data imaging are developed in recent years based on 3D geometry symmetry, continuity, uniformity, and sufficiency. So seismic data imaging-oriented geometry design can be adopted. However these approaches are qualitative analysis. We propose in this paper a 3D seismic geometry quantitative analysis approach for this purpose. Taking the main lobe/largest side lobe as an indicator, we use the double focusing algorithm based on Kirchhoff integral migration to do this. Geological model and real data tests verify the correctness of the proposed approach.