分时窗合成地震记录方法在南黄海的应用
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摘要
南黄海以往一般采用单时窗合成地震记录,即对测井曲线求得反射系数与理论子波进行褶积,但由于地层浅部和深部的频率不同,导致合成地震记录和实际地震剖面吻合得不好。提出了对地震资料采用分时窗提取子波合成地震记录的方法,从井旁地震道提取地震子波进行频谱分析,地层浅部和深部地震子波的主频和波形不同,并考虑时延特性,采用分析结果的地震子波进行分时窗合成地震记录。与以往用单时窗合成地震记录相比,分时窗合成地震记录提高了合成地震记录与地震波组的吻合度和分辨率。
Single-time-window synthetic seismograms has been widely used in the past in the seismic survey in the South Yellow Sea.Reflection coefficients was picked out from logging curves and convoluted with theoretical wavelets,so the frequencies for the shallow and deep layers are different,leading to the poor match of the synthetic seismograms to the real seismic profiles.This paper proposes a method to extract seismic wavelet from multi-time-window synthetic seismograms followed by spectrum analysis.Since the wavelet frequency and waveform are different in the shallow and deep strata,time delay is considered,and the results of seismic wavelet are applied to the multi-time-window synthetic seismograms.Multi-time-window synthetic seismograms has advantage of the match degree of synthetic seismograms and seismic wave group and the resolution,comparing with the previous single-time-window synthetic seismograms.
Single-time-window synthetic seismograms has been widely used in the past in the seismic survey in the South Yellow Sea.Reflection coefficients was picked out from logging curves and convoluted with theoretical wavelets,so the frequencies for the shallow and deep layers are different,leading to the poor match of the synthetic seismograms to the real seismic profiles.This paper proposes a method to extract seismic wavelet from multi-time-window synthetic seismograms followed by spectrum analysis.Since the wavelet frequency and waveform are different in the shallow and deep strata,time delay is considered,and the results of seismic wavelet are applied to the multi-time-window synthetic seismograms.Multi-time-window synthetic seismograms has advantage of the match degree of synthetic seismograms and seismic wave group and the resolution,comparing with the previous single-time-window synthetic seismograms.
引文
[1]吴建华,王绪龙.合成地震记录中的漂移校正[J].新疆石油地质,1991,12(3):206-211.
[2]李宗杰.合成地震记录的人机交互制作方法及应用[J].石油地球物理勘探,1999,34(增刊):96-102.
[3]孙学继,杨晓.合成地震记录制作方法研究[J].石油地球物理勘探,1997,32(增刊2):34-40.
[4]蒋淑婷,廖林,贾斐,等.提高合成地震记录质量的方法研究[J].江汉石油学院学报,2003,25(增刊下):42-43.
[5]张学东,李子锋,黄伟传,等,准中地区高精度合成地震记录的制作[J].新疆地质,2004,22(3):332-334.
[6]梁光河.地震子波提取方法研究[J].石油物探.1998,37(1):31-39.
[7]梁光河.测井约束地震子波外推方法研究[J].石油地球物理勘探,1998,33(3):296-304.
[8]冯晅,刘财,杨宝俊.分时窗提取地震子波及在合成地震记录中的应用[J].地球物理学进展,2002,17(1):71-77.
[9]蔡峰,孙萍.应用合成地震记录确定南黄海北部盆地中生代地层的分布[J].海洋科学,2005,29(4):45-50.
[10]孙振涛,孟宪军.高精度合成地震记录制作技术研究[J].石油地球物理勘探,2002,37(6):640-644.
[2]李宗杰.合成地震记录的人机交互制作方法及应用[J].石油地球物理勘探,1999,34(增刊):96-102.
[3]孙学继,杨晓.合成地震记录制作方法研究[J].石油地球物理勘探,1997,32(增刊2):34-40.
[4]蒋淑婷,廖林,贾斐,等.提高合成地震记录质量的方法研究[J].江汉石油学院学报,2003,25(增刊下):42-43.
[5]张学东,李子锋,黄伟传,等,准中地区高精度合成地震记录的制作[J].新疆地质,2004,22(3):332-334.
[6]梁光河.地震子波提取方法研究[J].石油物探.1998,37(1):31-39.
[7]梁光河.测井约束地震子波外推方法研究[J].石油地球物理勘探,1998,33(3):296-304.
[8]冯晅,刘财,杨宝俊.分时窗提取地震子波及在合成地震记录中的应用[J].地球物理学进展,2002,17(1):71-77.
[9]蔡峰,孙萍.应用合成地震记录确定南黄海北部盆地中生代地层的分布[J].海洋科学,2005,29(4):45-50.
[10]孙振涛,孟宪军.高精度合成地震记录制作技术研究[J].石油地球物理勘探,2002,37(6):640-644.
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