小波变换在合成道与井旁道对比中的应用
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摘要
针对地震与测井资料在时间、相位、频率和振幅等方面的差异,采用小波变换的Mallat算法对测井资料进行重采样,并把制作的合成地震道与井旁地震道进行多尺度分解,然后采用最小平方算法求取不同尺度空间的匹配滤波因子,再利用最小熵滤波方法来校正这些滤波因子,最终重构合成道信号。通过迭代计算,达到与井旁地震道的对比。实际资料的试处理验证了所用方法和算法的有效性。
To cope with the differences of seismic and logging data in terms of time,phase,frequency and amplitude,we discussed resample of well data and multi-resolution decomposition of synthetic seismogram and seismic traces nearby borehole by using Mallat's algorithm.With the least square algorithm,we calculated matching filtering factors in different scale space and then corrected these factors with minimum entropy filtering.Finally,the synthetic seismogram is updated by iterating correlation with the seismic traces nearby borehole.The feasibility of the method was demonstrated with real data.
To cope with the differences of seismic and logging data in terms of time,phase,frequency and amplitude,we discussed resample of well data and multi-resolution decomposition of synthetic seismogram and seismic traces nearby borehole by using Mallat's algorithm.With the least square algorithm,we calculated matching filtering factors in different scale space and then corrected these factors with minimum entropy filtering.Finally,the synthetic seismogram is updated by iterating correlation with the seismic traces nearby borehole.The feasibility of the method was demonstrated with real data.
引文
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2谢万学,王永刚,邢文军.井孔与地面地震数据联合反演方法综述[J].勘探地球物理进展,2006,29(1):1～6
3刘百红,李建华.测井和地震资料宽带约束反演的应用[J].石油物探,2004,43(1):76～79
4刘贵中,邸双亮.小波分析及其应用[M].西安:西安电子科技大学出版社,1992.178
5杨福生.小波变换的工程分析与应用[M].北京:科学出版社,1999.271
6Daubechies I.Ten Lectures on Wavelets[M].Phila-delphia:SIAM,1992.341
7沈平平,刘明新,汤磊.石油勘探开发中的数学问题[M].北京:科学出版社,2002.400
8Wiggins R A.Minimum entropy deconvolution[J].Geoexploration,1978,16(1):21～35
9曹孟起,周兴元,王君.统计法同态反褶积[J].石油地球物理勘探,2003,38(增刊):1～9
10王锐,孙成禹,尚新民.有限熵反褶积[J].石油地球物理勘探,2005,40(6):637～641
11李国发,李观寿,张立勤.零相位改进型最小熵反褶积方法[J].石油地球物理勘探,1996,31(3):359～366
12郝守玲.声波速度测量的频率和尺度效应分析[J].勘探地球物理进展,2005,28(5):309～313
13马劲风,赵圣亮,曲志浩.声波测井数据的深度域转换到时间域采样方法研究[J].石油地球物理勘探,1998,33(增刊1):40～45,55
14董恩清,刘贵忠,张宗平等.多分辨分析用于测井资料的重采样及合成记录与地震道的匹配[J].测井技术,1999,23(4):264～267
15靳玲,苏桂芝,刘桂兰等.合成地震记录制作的影响因素及对策[J].石油物探,2004,43(3):267～271
16郭刚明,时立彩,高生军等.小波变换在地震资料处理中的应用效果分析[J].石油物探,2003,42(2):237～239,270
17李春峰.从多尺度反射系数的角度评估反褶积模型的适用性[J].勘探地球物理进展,2005,28(4):250～257
18Verhelst F.Integration of seismic data with well-log data:[Dissertation][D].Delft:Delft University of Technology,2000
19Gisolf A.A quantitative analysis of seismic-to-well matching[J].Expanded Abstracts of the65thEAGE Conference and Exhibition,2003,299
20Hoekstra E V.Multiscale analysis of seismic data by the wavelet transform:[Dissertation][D].Delft:Delft University of Technology,1996
21Herrmann F,Stark C.Ascale attribute for texture in well-and seismic data[J].Expanded Abstracts of70th Annual International SEG Meeting,2000,2063～2066
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