自适应极化滤波在微地震信号处理中的应用
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摘要
野外采集的三分量微地震资料,通常能量弱,信噪比低,频率高,震源未知,波场复杂。常规的极化滤波方法通常选择固定的某一分量作为期望滤波的方向,已不能满足当前处理的要求。为此,在极化滤波的基础上,通过改进算法,设计了自适应极化滤波方法。该方法通过计算相邻道三分量信号偏振投影的最大互相关系数得到波的跟踪分量,把波的跟踪分量作为极化滤波因子的期望方向,改进常规滤波因子,实现自适应极化滤波。实际资料处理结果表明,该方法理论正确,处理效果也得到了明显的改善。
Three-component microseismic data are characterized by low energy,low signal-to-noise ratio,high frequency,unknown sources,and complex wavefield.Conventional polarization filtering can not meet the demands of microseismic data processing due to its predefined output direction.The author put forward an adaptive polarization filtering method.This method determines the wave track component by correlating the polarization projections of adjacent multi-component traces.The wave track component is then viewed as the direction of polarization filtering operator.Results of real data processing confirm the correctness of the proposed method.
Three-component microseismic data are characterized by low energy,low signal-to-noise ratio,high frequency,unknown sources,and complex wavefield.Conventional polarization filtering can not meet the demands of microseismic data processing due to its predefined output direction.The author put forward an adaptive polarization filtering method.This method determines the wave track component by correlating the polarization projections of adjacent multi-component traces.The wave track component is then viewed as the direction of polarization filtering operator.Results of real data processing confirm the correctness of the proposed method.
引文
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7黄中玉,高林,谢大进,等.三分量数据的偏振分析及其应用[J].石油物探,1996,35(2):9～16
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9Perelberg A I,Hornbostel S C.Hornbostel.Applications of seismic polarization analysis[J].Geophysics,1994,59(1):119～130
10Benhama A.Study and application of spatial dimentional filtering in three component recordings[J].Geophysical Prospecting,1988,36(6):570～582
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12吴律.层析基础及其在井间地震中的应用[M].北京:石油工业出版社,1997.237～269
13朱光明.垂直地震剖面法[M].北京:石油工业出版社,1988.64～117
14Gulati J S,Swewart R R,Parkin J M.Analyzing three-component3D vertical seismic profiling data[J].Geo-physical,2004,69(2):386～392
15刘建华,刘编田,胥颐,等.三分量地震资料的偏振分析[J].地球物理学进展,2006,21(1):6～10
16徐振海,王雪松,肖顺平,等.极化自适应递推滤波算法[J].电子学报,2002,30(4):608～610
2加尔彼林.地震勘探偏振法[M].何樵登,杨宝俊,译.北京:石油工业出版社,1989.1～193
3王雪松,汪连栋,肖顺平,等.自适应极化滤波器的理论性能分[J].电子学报,2004,32(8):1326～1329
4张霖斌,何樵登,方云峰.频率波数域预测和减去法压制多次波[J].吉林大学学报(地球科学版),2002,32(1):96～99
5赵鸿儒,孙进忠,唐文榜,等.全波震相分析[M].北京:地震出版社,1991.1～228
6宋维琪,孙英杰,朱卫星.微地震资料频率域相干-时间域偏振滤波方法[J].石油地球物理勘探,2008,43(2):161～167
7黄中玉,高林,谢大进,等.三分量数据的偏振分析及其应用[J].石油物探,1996,35(2):9～16
8张山,刘清林,赵群,等.微地震监测技术在油田开发中的应用[J].石油物探,2002,41(2):226～231
9Perelberg A I,Hornbostel S C.Hornbostel.Applications of seismic polarization analysis[J].Geophysics,1994,59(1):119～130
10Benhama A.Study and application of spatial dimentional filtering in three component recordings[J].Geophysical Prospecting,1988,36(6):570～582
11唐建侯,杨慧珠,贺振华,等.P-SV快慢横波旋转分离公式研究[J].天然气工业,2004,24(12):44～47
12吴律.层析基础及其在井间地震中的应用[M].北京:石油工业出版社,1997.237～269
13朱光明.垂直地震剖面法[M].北京:石油工业出版社,1988.64～117
14Gulati J S,Swewart R R,Parkin J M.Analyzing three-component3D vertical seismic profiling data[J].Geo-physical,2004,69(2):386～392
15刘建华,刘编田,胥颐,等.三分量地震资料的偏振分析[J].地球物理学进展,2006,21(1):6～10
16徐振海,王雪松,肖顺平,等.极化自适应递推滤波算法[J].电子学报,2002,30(4):608～610
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