渤海海域水平拖缆数据宽频处理关键技术

近年来海上浅水区宽频地震勘探技术进展缓慢，尤其像渤海这样平均水深不超过30m的浅水海域，宽频采集难以实施，只能通过常规采集、宽频处理才有可能实现这一目的，其中鬼波及浅水多次波是制约浅水资料宽频处理的两个主要因素。针对浅水海域水平拖缆鬼波时空变剧烈难以压制的问题，研究了τ-p域自适应参数估计的水平缆鬼波压制技术；针对渤海海域海底模型难以建立、浅水多次波压制困难的问题，研究了τ-p域自适应海底模型估计的浅水多次波压制技术。渤海M工区实际数据的应用结果表明，这两项关键技术能有效拓宽地震资料的频带宽度，实现渤海海域常规水平拖缆地震资料的宽频处理。

Key techniques for broadband processing of plane streamer data in Bohai Sea

In recent years,few progresses have been made in broadband seismic exploration technology in shallow water.Especially in shallow water area such as Bohai Sea,where the average water depth is not greater than 30m,broadband acquisition is difficult to be implemented,and only can be realized through conventional acquisition and broadband processing.Ghost and shallow water multiple are the two main factors which restrict the broadband processing of shallow water data.In this paper,an adaptive deghosting method in τ-p domain was proposed to solving the problem of fierce time-space variation of ghost waves in shallow water.An adaptive shallow water multiple suppression method in τ-p domain was proposed to solve the problem that seabed model of Bohai Sea is difficult to be established.The application results in real seismic data in Bohai Sea demonstrated that the two key techniques proposed in this paper can broaden the frequency bandwidth of seismic data effectively,so as to realize the broadband processing of conventional plane streamer data in Bohai Sea.