F-K变换与预测反褶积压制多次波效果对比
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摘要
多次波压制是地震资料处理中一个重要步骤。根据多次波发生下行反射的位置,可以把多次波分为两类:自由界面多次波和层间多次波。不同的多次波有着不同特性,一种压制多次波的方法往往只能针对特定的某一种多次波进行压制。F-K域压制多次波和预测反褶积分别利用了多次波的可分性和周期性这两种具有代表性压制多次波的处理方法。这里首先利用声波时差有限差分的方法对模型进行了正演计算,得到了包含不同类型多次波的地震数据;然后对正演数据分别应用F-K域压制多次波和预测反褶积两种压制多次波技术对自由界面多次波和层间多次波进行处理;最后对比分析了两种方法的处理效果,总结了两种方法的适用条件。F-K域多次波压制手段适用于多次波与一次波时差差异较大的情况,预测反褶积对小炮检距附近严格满足周期性的多次波去除效果较好。
Multiple attenuation is one of the most important issues in the seismic data processing,which is still a partially solved problem in exploration seismology.Based on the reflection where the downward reflection happens,there are two types of multiple:surface-related multiple and internal-multiple.Since different multiples have their unique characters,one attenuation method can only deal with one particular type of multiples.F-K domain and prediction deconvolution are two basic approaches on multiple attenuation,which use the "periodicity" and " separability" of the multiple.In this paper,synthesized seismic data containing different types of multiples are generated by using finite difference modeling of the full acoustic wave equation.Then,two different multiple attenuation methods,F-K dominant prediction deconvolution,are applied to the synthetized seismic data with surface-related multiple and internal-multiple.Finally,compared the results,the preconditions of the two methods are discussed.Mutiple and primary waves which have significant time difference,can be separated efficiently in F-K domain.Prediction deconvolution can applied to attenuate near offset multiples which have a strictly periodic.
Multiple attenuation is one of the most important issues in the seismic data processing,which is still a partially solved problem in exploration seismology.Based on the reflection where the downward reflection happens,there are two types of multiple:surface-related multiple and internal-multiple.Since different multiples have their unique characters,one attenuation method can only deal with one particular type of multiples.F-K domain and prediction deconvolution are two basic approaches on multiple attenuation,which use the "periodicity" and " separability" of the multiple.In this paper,synthesized seismic data containing different types of multiples are generated by using finite difference modeling of the full acoustic wave equation.Then,two different multiple attenuation methods,F-K dominant prediction deconvolution,are applied to the synthetized seismic data with surface-related multiple and internal-multiple.Finally,compared the results,the preconditions of the two methods are discussed.Mutiple and primary waves which have significant time difference,can be separated efficiently in F-K domain.Prediction deconvolution can applied to attenuate near offset multiples which have a strictly periodic.
引文
[1]李鹏.多次波问题的研究进展[J].地球物理学进展,2006(3):888-897.
[2]牛滨华,沈操,黄新武.波动方程多次波压制技术的进展[J].地球物理学进展,2002(3):480-485.
[3]王汝珍.多次波识别与衰减[J].勘探地球物理进展,2003(Z1):423-432.
[4]崔凤林,松辽盆地北部东部深层火山岩处理解释技术及效果[J].天然气工业,2007(S1):125-127.
[5]刘洪林.火山机构的反射特征及其地震识别方法[J].大庆石油学院学报,2008(4):20-22,133.
[6]韩站一.火成岩下伏地层地震反射波场特征研究[J].石油物探,2009(3):226-231,15.
[7]刘伟明.基于CFP技术层间多次波压制方法研究[D].长春:吉林大学,2010.
[8]顾汉明,王纬,陈国俊.复杂介质中地震多次反射波快速正演模拟[J].地球科学,2001(5):541-544.
[9]梁尚勇,胡斌与季红军,苏北盆地复杂断块地区资料处理解释及效果[J].石油物探,2002(3):367-371.
[10]徐文君,於文辉,卞爱飞.地震资料多次波处理[J].工程地球物理学报,2005(6):417-424.
[2]牛滨华,沈操,黄新武.波动方程多次波压制技术的进展[J].地球物理学进展,2002(3):480-485.
[3]王汝珍.多次波识别与衰减[J].勘探地球物理进展,2003(Z1):423-432.
[4]崔凤林,松辽盆地北部东部深层火山岩处理解释技术及效果[J].天然气工业,2007(S1):125-127.
[5]刘洪林.火山机构的反射特征及其地震识别方法[J].大庆石油学院学报,2008(4):20-22,133.
[6]韩站一.火成岩下伏地层地震反射波场特征研究[J].石油物探,2009(3):226-231,15.
[7]刘伟明.基于CFP技术层间多次波压制方法研究[D].长春:吉林大学,2010.
[8]顾汉明,王纬,陈国俊.复杂介质中地震多次反射波快速正演模拟[J].地球科学,2001(5):541-544.
[9]梁尚勇,胡斌与季红军,苏北盆地复杂断块地区资料处理解释及效果[J].石油物探,2002(3):367-371.
[10]徐文君,於文辉,卞爱飞.地震资料多次波处理[J].工程地球物理学报,2005(6):417-424.
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