基于实际地震资料的覆盖次数和信噪比关系分析
|
摘要
目前高精度三维地震资料采集中采用多高的覆盖次数既能达到所希望的信噪比,又能合理地控制采集投资是必须考虑的实际问题。以永新地区高精度实际地震资料为基础,通过对该区细分面元的观测系统进行退化处理,选取了8种覆盖次数相对均匀、属性较好并且在野外可以实现的观测系统作为研究基础,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声背景下的资料进行信噪比分析和统计,研究了覆盖次数与信噪比的关系曲线,并根据实际统计曲线,得出结论:①信噪比与面元的大小基本无关,只与覆盖次数有关;②不同面元覆盖次数相同,信噪比一致;③高精度三维地震资料采集覆盖次数选择在200次左右。
In high-precision 3D seismic data acquisition,the fold must be chosen to achieve the expected SNR as well as to reasonably control the cost.On the basis of the actual high-precision seismic data in Yongxin area,by the degradation processing on the divisible-bin geometry, eight geometries were selected which had relatively even fold and better properties and could be deployed in the field,we uti- lized frequency spectrum estimation method to carry out analysis and statistics on SNR under the conditions of same bin with different fold,different bin with the same fold and different noise background, studied the relationship of fold and SNR.In terms of the actual statistics curve,the conclusions can be achieved:①the SNR is related to fold and almost has nothing to do with bin size;②the SNR of different seismic data is the same if the fold is the same;③the fold of high-precision 3D seismic data should be about 200.
In high-precision 3D seismic data acquisition,the fold must be chosen to achieve the expected SNR as well as to reasonably control the cost.On the basis of the actual high-precision seismic data in Yongxin area,by the degradation processing on the divisible-bin geometry, eight geometries were selected which had relatively even fold and better properties and could be deployed in the field,we uti- lized frequency spectrum estimation method to carry out analysis and statistics on SNR under the conditions of same bin with different fold,different bin with the same fold and different noise background, studied the relationship of fold and SNR.In terms of the actual statistics curve,the conclusions can be achieved:①the SNR is related to fold and almost has nothing to do with bin size;②the SNR of different seismic data is the same if the fold is the same;③the fold of high-precision 3D seismic data should be about 200.
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,2002:1-207
[4]Schroeder F W著.覆盖次数和面元尺寸怎样影响数据可解释性[J].高林译.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(增刊2): 77-79
[10]唐云,李显贵,邱华,等.宽方位地震资料采集观测系统设计初探[J].石油物探,2003,42(2):34-39
[11]刘麟,阳芳.地震属性在勘探阶段中的应用[J].石油物探,2004,43(增刊):233-236
[12]狄帮让,顾培成.地震偏移成像分辨率的定量分析[J].石油大学学报,2005,29(5):23-26
[13]邱天林.沙漠地区地震资料处理方法研究[J].石油物探,2004,43(5):458-461
[14]曹务祥,安树杰,蓝益军,等.排列长度对组合效应的影响分析[J].石油物探,2008,47(3):315-318
[15]李桂林,梁运基,王德志,等.渐变观测系统的设计原则及其应用[J].石油地球物理勘探,2004,39(4): 461-464
[16]张付生,马义忠,王帮助,等.泌阳凹陷新庄地区高密度三维地震资料采集方法研究[J].石油物探,2009, 48(6):615-620
[17]王赢,贾烈明,朱艳保,等.可分面元三维观测系统浅析[J].石油物探,2009,48(3):299-302
[18]尹成,吕公河,田继东,等.基于地球物理目标参数的三维观测系统优化设计[J].石油物探,2006,45(1): 74-78
[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,2002:1-207
[4]Schroeder F W著.覆盖次数和面元尺寸怎样影响数据可解释性[J].高林译.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(增刊2): 77-79
[10]唐云,李显贵,邱华,等.宽方位地震资料采集观测系统设计初探[J].石油物探,2003,42(2):34-39
[11]刘麟,阳芳.地震属性在勘探阶段中的应用[J].石油物探,2004,43(增刊):233-236
[12]狄帮让,顾培成.地震偏移成像分辨率的定量分析[J].石油大学学报,2005,29(5):23-26
[13]邱天林.沙漠地区地震资料处理方法研究[J].石油物探,2004,43(5):458-461
[14]曹务祥,安树杰,蓝益军,等.排列长度对组合效应的影响分析[J].石油物探,2008,47(3):315-318
[15]李桂林,梁运基,王德志,等.渐变观测系统的设计原则及其应用[J].石油地球物理勘探,2004,39(4): 461-464
[16]张付生,马义忠,王帮助,等.泌阳凹陷新庄地区高密度三维地震资料采集方法研究[J].石油物探,2009, 48(6):615-620
[17]王赢,贾烈明,朱艳保,等.可分面元三维观测系统浅析[J].石油物探,2009,48(3):299-302
[18]尹成,吕公河,田继东,等.基于地球物理目标参数的三维观测系统优化设计[J].石油物探,2006,45(1): 74-78
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心