覆盖次数与信噪比的定量关系分析
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摘要
如何选取合适的覆盖次数才能既达到所希望的信噪比,又能够合理控制采集的投资,是高精度三维地震资料采集必须考虑的实际问题。以永新48线75炮细分面元观测系统为基础,通过观测系统退化方法,获得了8种覆盖次数相对较均匀的观测系统,利用频谱估算的信噪比计算方法,对相同面元不同覆盖次数、不同面元相同覆盖次数以及不同噪音背景下的资料进行信噪比的定量分析、统计,研究出了覆盖次数与信噪比的关系曲线,并最终得出了对高精度采集和投资决策有益的结论。
In the 3D seismic data acquisition with high accuracy,how to choose the suitable fold for both obtaining the expected S/N and reasonably controlling the acquisition investment,which must be considered in the real world situation.Eight new recording geometries with steady fold have been obtained through the medium of recording geometry degenerate,based on Yongxin subdivide bin recording geometry with 48 detect-lines and 75 shots.Using SNR calculation method of spectral estimate to have a quantitative analysis and research on the relationship between fold and SNR in case of the same bin with different fold,different bin with the same fold as well as the same bin with differ fold and differ noise background,the relationship curve of fold and SNR has been studied,with useful conclusions for high accuracy acquisition and investment decisions.
In the 3D seismic data acquisition with high accuracy,how to choose the suitable fold for both obtaining the expected S/N and reasonably controlling the acquisition investment,which must be considered in the real world situation.Eight new recording geometries with steady fold have been obtained through the medium of recording geometry degenerate,based on Yongxin subdivide bin recording geometry with 48 detect-lines and 75 shots.Using SNR calculation method of spectral estimate to have a quantitative analysis and research on the relationship between fold and SNR in case of the same bin with different fold,different bin with the same fold as well as the same bin with differ fold and differ noise background,the relationship curve of fold and SNR has been studied,with useful conclusions for high accuracy acquisition and investment decisions.
引文
[1]曲寿利.高密度三维地震技术——老油区二次勘探的关键技术之一[J].石油物探,2006,45(6):557-562
[2]赵会欣,晋志刚,张宇生等.高密度空间采样地震采集覆盖次数的选择[J].天然气工业,2007,27(增刊A):68-69
[3]熊翥.复杂地区地震数据处理思路[M].北京:石油工业出版社,2002:207
[4]Fred W.Schroeder等著,高林译.覆盖次数和面元尺寸怎样影响数据可解释性[J].石油物探译丛,1999,1:19-32
[5]张伟,尹成,田继东等.三维观测系统参数的退化性处理试验[J].石油物探,2007,46(1):69-73
[6]张军华,张帆,郑旭刚等.地震采集脚印综合评述[J].石油仪器,2007,21(5):1-4
[7]侯成福,蒋连斌,高书琴.三维观测系统与采集脚印[J].石油地球物理勘探,2007,42(6):611-615
[8]张军华,藏胜涛,徐辉等.地震资料信噪比定量计算及方法比较[J].石油地球物理勘探,2009,44(4):481-886
[9]莫延刚,段卫星,李玉兴等.浅析覆盖次数和信噪比的关系[J].石油地球物理勘探,2008,43(2):77-79
[2]赵会欣,晋志刚,张宇生等.高密度空间采样地震采集覆盖次数的选择[J].天然气工业,2007,27(增刊A):68-69
[3]熊翥.复杂地区地震数据处理思路[M].北京:石油工业出版社,2002:207
[4]Fred W.Schroeder等著,高林译.覆盖次数和面元尺寸怎样影响数据可解释性[J].石油物探译丛,1999,1:19-32
[5]张伟,尹成,田继东等.三维观测系统参数的退化性处理试验[J].石油物探,2007,46(1):69-73
[6]张军华,张帆,郑旭刚等.地震采集脚印综合评述[J].石油仪器,2007,21(5):1-4
[7]侯成福,蒋连斌,高书琴.三维观测系统与采集脚印[J].石油地球物理勘探,2007,42(6):611-615
[8]张军华,藏胜涛,徐辉等.地震资料信噪比定量计算及方法比较[J].石油地球物理勘探,2009,44(4):481-886
[9]莫延刚,段卫星,李玉兴等.浅析覆盖次数和信噪比的关系[J].石油地球物理勘探,2008,43(2):77-79
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