Ricker子波视主频的变化对混沌振子检测效果的影响
|
摘要
针对地震勘探资料中存在加性强随机噪声干扰,已经提出用混沌振子系统处理的方法技术.为完善该方法,需要研究诸如地震勘探同相轴完整程度、组成同相轴的地震子波变化等对系统检测效果的影响.本文以Ricker子波模拟地震子波,研究Ricker子波视主频变化的相应检测效果.研究结果:随着Ricker子波视主频的升高,检测SNR逐渐变差,在高频部分SNR的变化明显比低频部分缓慢;在通常地震勘探频率范围内,混沌振子系统检测SNR有可能部分补偿由于地震波传播引起的幅度降低;为检测由畸变子波构成的同相轴提供一定的可能.
For the seismic prospecting data with additive noise,it has been put up to deal with the data using the chaotic oscillator system.It is needed to study the influence on the detection effects,which is aroused by such as the level of integrity of the seismic prospecting event、the variety of the apparent dominant frequency of the Ricker wavelet.The findings: with the apparent dominant frequency of the Ricker wavelet rising,the detection SNR will get worse gradually,it is obvious that the variety of the SNR is slower during the portion of high frequency than during the portion of low frequency; in the usual range of seismic prospecting frequency,the SNR of the chaotic oscillator detection system could partially make up the amplitude attenuation aroused by the transmit of the seismic wave;the results could provide help for detecting the event constituted by aberrant wavelets.
For the seismic prospecting data with additive noise,it has been put up to deal with the data using the chaotic oscillator system.It is needed to study the influence on the detection effects,which is aroused by such as the level of integrity of the seismic prospecting event、the variety of the apparent dominant frequency of the Ricker wavelet.The findings: with the apparent dominant frequency of the Ricker wavelet rising,the detection SNR will get worse gradually,it is obvious that the variety of the SNR is slower during the portion of high frequency than during the portion of low frequency; in the usual range of seismic prospecting frequency,the SNR of the chaotic oscillator detection system could partially make up the amplitude attenuation aroused by the transmit of the seismic wave;the results could provide help for detecting the event constituted by aberrant wavelets.
引文
[1]李月,杨宝俊.微弱正弦信号检测模型混沌解的判定[J].地球物理学进展,2002,17(1):133~136.
[2]李月,杨宝俊,赵雪平,等.检测地震勘探微弱同相轴的混沌振子算法[J].地球物理学报,2005,48(6):1428~1433.
[3]Sheriff R E.Encyclopedic dictionary of exploration Geophysics[M].Tulsa:Society of Exploration Geophysicists,1994,254~255,108.
[4]杨宝俊.勘探地震学导论[上册][M].长春:吉林科技出版社,1990.
[5]LI Yue,Yang B J.Chaotic system for the detection of periodicsignals under the background of strong noise[J].Chinese Sci-ence Bulletin,2003,48(5):508~510.
[6]林红波,李月,马海涛,等.混沌噪声背景下检测微弱信号的神经网络方法分析[J].地球物理学进展,2003,18(4):743~747.
[7]张宾,李月,马海涛.微弱信号混沌检测临界阈值的Lyapunov指数算法[J].地球物理学进展,2003,18(4):748~751.
[8]Li Y,Yang B J,Deng X Y,et al.Physical mechanism of thechaotic detection of the unknown frequency of weak harmonicsignal and effects of damping ratio on the detection results[J].Chinese Physics,2004,13(9):1386~1390.
[9]杨宝俊,张伯军,杨有发,等.地震勘探频率中近抛物线型衰减的物理解释[J].长春地质学院学报,1990,20(3):323~330.
[10]杨宝俊,穆石敏,金旭,等.中国满洲里-绥芬河地学断面地球物理综合研究[J].地球物理学报,1996,39(6):772~782.
[11]Jie Z Z,Jie W G,Harris J M.Multi-component wavefieldsimulation in viscous extensively dilatancy anisotropic media[J].Phys Earth Planet Interiors,1999,114:25~38.
[12]李庆忠.走向精确勘探的道路-高分辨地震勘探系统工程剖析[M].北京:石油工业出版社,1993.
[2]李月,杨宝俊,赵雪平,等.检测地震勘探微弱同相轴的混沌振子算法[J].地球物理学报,2005,48(6):1428~1433.
[3]Sheriff R E.Encyclopedic dictionary of exploration Geophysics[M].Tulsa:Society of Exploration Geophysicists,1994,254~255,108.
[4]杨宝俊.勘探地震学导论[上册][M].长春:吉林科技出版社,1990.
[5]LI Yue,Yang B J.Chaotic system for the detection of periodicsignals under the background of strong noise[J].Chinese Sci-ence Bulletin,2003,48(5):508~510.
[6]林红波,李月,马海涛,等.混沌噪声背景下检测微弱信号的神经网络方法分析[J].地球物理学进展,2003,18(4):743~747.
[7]张宾,李月,马海涛.微弱信号混沌检测临界阈值的Lyapunov指数算法[J].地球物理学进展,2003,18(4):748~751.
[8]Li Y,Yang B J,Deng X Y,et al.Physical mechanism of thechaotic detection of the unknown frequency of weak harmonicsignal and effects of damping ratio on the detection results[J].Chinese Physics,2004,13(9):1386~1390.
[9]杨宝俊,张伯军,杨有发,等.地震勘探频率中近抛物线型衰减的物理解释[J].长春地质学院学报,1990,20(3):323~330.
[10]杨宝俊,穆石敏,金旭,等.中国满洲里-绥芬河地学断面地球物理综合研究[J].地球物理学报,1996,39(6):772~782.
[11]Jie Z Z,Jie W G,Harris J M.Multi-component wavefieldsimulation in viscous extensively dilatancy anisotropic media[J].Phys Earth Planet Interiors,1999,114:25~38.
[12]李庆忠.走向精确勘探的道路-高分辨地震勘探系统工程剖析[M].北京:石油工业出版社,1993.
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