井控谱约束反褶积方法及其应用

Well-control spectrum constraint deconvolution

井控谱约束反褶积方法根据地震资料和VSP资料的频带确定有效信号的频带范围,设计谱约束算子,使地表一致性反褶积仅在一定频带内进行,既限制了高、低频噪声,又在提高分辨率的同时,保持了较高的信噪比。在井控谱约束反褶积过程中,采用的井匹配处理定量分析方法突破了常规反褶积处理参数优选定性质控的局限性,将井旁地震道与合成记录或VSP走廊叠加进行互相关分析,生成一系列匹配属性(可预测度、可信度等)的定量信息,定量化与定性化的综合参数优选方法使得参数的选择更加合理。实际资料处理取得了较好的效果。

With spectrum constraint operator based on seismic and VSP data,surface-consistent deconvolution can just be operated in a certain frequency band.Therefore this approach,called as well-control spectrum constraint deconvolution,improves seismic data resolution and suppresses high &low frequency noise.In the well-control spectrum constraint deconvolution processing,well-match quantitative analysis provides us with a new quality control measure by correlation analysis of seismic trace and synthetic seismogram or VSP corridor stack.The new quantitative and qualitative analysis provides us more comprehensive parameter optimization methods.Field data applications show that the proposed approach works very well.