CSI:基于压缩感知的高精度高效率地震资料采集技术

介绍了CSI(Compressive Seismic Imaging)技术。该技术是基于压缩感知理论所开发出的一整套地震资料采集和处理综合技术,主要包括非规则最优化采样设计、地震信号的稀疏化处理、基于稀疏反演的数据重构及同时震源分离等内容。CSI利用非规则最优化设计和独立同时震源作业,极大地提高了采集效率,缩短了采集周期,从而以较低成本完成高品质、高密度的三维地震资料采集。在地震资料处理过程中,通过信号分离与数据重建来高保真地恢复叠前地震信号。海底节点、海上拖缆和陆地可控震源等生产项目中的应用结果表明,与宽频带处理以及叠前深度偏移技术相结合,CSI提供了高质量、高精度的地下成像结果。

This paper introduces compressive seismic imaging (CSI) technology.Based on the theory of compressive sensing,the CSI technology has been developed for seismic acquisition and processing,including non-uniform optimal sampling,sparse representation of seismic data,and inversion-based data reconstruction and simultaneous source separation.CSI utilizes non-uniform optimal design and independent simultaneous source operation to significantly increase the efficiency and reduce the duration of acquisition.Therefore,high-density 3D acquisition can be achieved at lower cost with higher resolution.Inversion-based data-reconstruction and source-separation techniques also provide high-fidelity pre-stack data in processing.CSI technology has been successfully applied to ocean-bottom node,marine streamer,and land Vibroseis acquisitions in production.In combination with broadband processing and pre-stack depth migration,CSI technology offers high-quality and high-resolution subsurface imaging.