子波最小相位对最小平方反褶积效果影响
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摘要
常规地面地震勘探中,地震波高频损失的影响因素有许多。为此,人们研究了各类反褶积方法提高分辨率。但是这些方法很多都是带有一定假设的,比如,假设子波是最小相位而且稳定的。本文研究了子波的最小相位性在提高地震资料分辨率中的重要性。准确的提取出地层的反射系数,是地震资料处理过程中重要而关键的一步。本文研究了不同相位子波(最小相位和混合相位)和对反褶积效果的影响,并且用最小平方反褶积来验证。实验结果表明,子波的最小相位性对最小平方反褶积效果有显著影响。
Rising up the resolving power is the eternal theme of hydrocarbon reservoir and physical geography.In normal seismic prospecting,the loss of high frequency of seismic signals is great.So people have a lot of ways of deconvolution to raise the resolution.Unfortunately,they need premises,such as wavelets have to be minimum phased and steady.In this article,the importance of minimum phase of wavelets is researched.It is important to distill reflecting coefficients accurately when processing seismic logs.The influence of wavelets of minimum phase to the effect of minimum square anti-convolution is researched.Wavelets of different phases(minimum phase and mixed phase)are experimented to approve the influence to the effect of minimum square anti-convolution.Experimental results of different wavelets demonstrate the effectiveness of minimum phase wavelets.
Rising up the resolving power is the eternal theme of hydrocarbon reservoir and physical geography.In normal seismic prospecting,the loss of high frequency of seismic signals is great.So people have a lot of ways of deconvolution to raise the resolution.Unfortunately,they need premises,such as wavelets have to be minimum phased and steady.In this article,the importance of minimum phase of wavelets is researched.It is important to distill reflecting coefficients accurately when processing seismic logs.The influence of wavelets of minimum phase to the effect of minimum square anti-convolution is researched.Wavelets of different phases(minimum phase and mixed phase)are experimented to approve the influence to the effect of minimum square anti-convolution.Experimental results of different wavelets demonstrate the effectiveness of minimum phase wavelets.
引文
[1]田孝坤.基于模型的地震子波处理技术[J].石油地球物理勘探,1998,33(增刊2):16-22.
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[3]王西文.提取地震信号中高频信息方法的若干问题[J].石油地球物理勘探,2006,41(1):67-75.
[4]王西文.相对保幅的地震资料连片处理方法研究[J].石油物探,2006,45(2):105-120.
[5]王西文,刘全新,吕焕通,等.储集层预测技术在岩性油气藏勘探开发中的应用[J].石油勘探与开发,2006,33(2):189-193.
[6]TSVANKIN I.Reflection moveout and Parameter estimation for horizontal transverseisotropy[J].GeoPhsics,1997,62(2):614-629.
[7]SEN M K.Nonlinear one-dimensional seismic waveform inversion using simulated annealing[J].GeoPhsics,1991,56(10):1624-1638.
[8]GISLAIN B,MADIBA G A.Seismic impedance inversion and interpretation of a gas carbonate reservoir in the Alberta Foothills,western Canada[J].Geophysics,2003,68(5):1460-1469.
[2]陆基孟.地震勘探原理[M].北京:石油工业出版社,1993.
[3]王西文.提取地震信号中高频信息方法的若干问题[J].石油地球物理勘探,2006,41(1):67-75.
[4]王西文.相对保幅的地震资料连片处理方法研究[J].石油物探,2006,45(2):105-120.
[5]王西文,刘全新,吕焕通,等.储集层预测技术在岩性油气藏勘探开发中的应用[J].石油勘探与开发,2006,33(2):189-193.
[6]TSVANKIN I.Reflection moveout and Parameter estimation for horizontal transverseisotropy[J].GeoPhsics,1997,62(2):614-629.
[7]SEN M K.Nonlinear one-dimensional seismic waveform inversion using simulated annealing[J].GeoPhsics,1991,56(10):1624-1638.
[8]GISLAIN B,MADIBA G A.Seismic impedance inversion and interpretation of a gas carbonate reservoir in the Alberta Foothills,western Canada[J].Geophysics,2003,68(5):1460-1469.
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