波场延拓反Q滤波的正则化方法  

Regularization method of inverse Q filtering based on wave field continuation

作　　者：张瑾[1] 刘财[1] 冯晅[1] 王典[1] 于月[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130021

出　　处：《世界地质》2013年第1期123-129,共7页World Geology

基　　金：油页岩勘探开发利用产学研用合作创新研究项目(OSP-02;OSR-02);吉林大学科学前沿与交叉学科创新项目(200810011);国家973计划项目(2009CB219301);公益性行业科研专项项目(201011078)资助

摘　　要：基于波场向下延拓的反Q滤波是补偿大地衰减效应的一种常用方法,但其振幅补偿的不稳定性限制了该方法在中、深层地震资料处理中的应用。针对于此,提出波场延拓反Q滤波的正则化方法,该方法不仅较好地解决了地震波能量补偿的不稳定问题,同时对经过品质因子较低地层的深层地震波有着较好的能量补偿效果。模型试验和实例应用均表明:与常规稳定的反Q滤波方法相比,基于正则化法的反Q滤波不仅具有较强的抗干扰能力和较好的振幅补偿能力,而且有效地提高了中、深层地震资料的分辨能力。Inverse Q filtering based on wave field downward continuation is an useful method for the compensation of stratigraphic absorption, but the instability of amplitude compensation restricts the application of this method in medium and deep-seated stratum seismic data. We propose the regularization method of inverse Q filtering based on wave field continuation. This method can not only solve the instability of seismic wave energy compensation, but also availably compensate the deep-seated stratum seismic waves which cross the strata with the low- er quality factors. The results of model tests and practical applications indicate that the regularization method of in- verse Q filtering based on wave field continuation has a better ability to overcome the noise and to compensate deepseated stratum seismic wave amplitude comparing with the common inverse Q filtering methods, and also can im- prove the resolution on medium- and deep-seated stratum seismic data.

关 键 词：反Q滤波 振幅补偿 滤波特性 稳定性 正则化法 

分 类 号：P631.4[天文地球—地质矿产勘探]