电磁驱动可控震源激发信号估计方法研究
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摘要
电磁驱动可控震源应用中,常规方法采用基板附近信号估计激发信号。研究发现,复杂地质条件下,该方法估计结果误差较大。因此,提出利用直达波与其他地震波到时不一致的特征,通过匹配滤波技术从震源基板附近信号中提取直达波来估计震源激发信号的新方法。数值模拟研究表明,方法估计的激发信号与理想激发信号相关系数为0.957 4,达到高度线性相关,说明方法适用于复杂地质条件下电磁驱动可控震源激发信号的高精度估计。
The conventional method is used the signal near base-plate to estimate the excitation signal of electromagnetic seismic vibrator. The study finds that when the geological structure is complex,the estimation result using conventional method has error. So a new method that according to the different arrival time among direct wave and other seismic waves is proposed,extracting the direct wave from the signal near base-plate by matched filter technology to estimate the excitation signal. Research on simulation data demonstrates that,the correlation coefficient between the estimation excitation signal and ideal excitation signal is 0. 957 4,up to highly linear correlation. The method can be used for high precision estimation of excitation signal in electromagnetic seismic vibrator when the geological structure is complex.
引文
1 姚恩超,姜弢,林君,等.K-L分解在可控震源锁相控制中的应用.科学技术与工程,2014;14(20):45—50Yao Enchao,Jiang Tao,Lin Jun,et al.Application of karhunen-loève expansion for the phase-locked control system in seismic vibrator.Science Technology and Engineering,2014;14(20):45—50
    2 姜弢,林君,陈祖斌,等.可控震源相控地震的相关检测技术.仪器仪表学报,2005;26(4):336—339Jiang T,Lin J,Chen Z B,et al.The correlation detection method of signals in phased array of vibroseis system.Chinese Journal of Scientific Instrument,2005;26(4):336—339
    3 Castenet A,Lavergne M.Vibrator controlling system.US Patent,3208550,1965
    4 Sallas J J.Seismic vibrator control and the downgoing P-wave.Geophysics,1984;49(6):732—740
    5 Wei Z H.Modelling and modal analysis of seismic vibrator baseplate.Geophysical Prospecting,2010;58:19—31
    6 Veen M,Brouwer J,Helbig K.Weighted sum method for calculating ground force:an evaluation by using a portable vibrator system.Geophysical Prospecting,1999;47,241—267
    7 林君.电磁驱动可控震源地震勘探原理及应用.北京:科学出版社,2004:55—71Lin J.Seismic exploration and application of vibrator driven by electromagnetic.Beijing:Science Press,2004:55—71
    8 王俊秋,林君,姜弢,等.可控震源地震方法在金昌铜镍矿区的应用实验.吉林大学学报(地球科学版),2011;41(5):1617—1622Wang J Q,Lin J,Jiang T,et al.Experiment and application of controlled vibrator seismic method at Jinchang copper-nickel metal deposit.Journal of Jilin University(Earth Science Edition),2011;41(5):1617—1622
    9 王俊秋,林君,陈祖斌,等.小型可控震源在油页岩地震勘探中的应用试验.吉林大学学报(地球科学版),2012;42(3):265 —270Wang J Q,Lin J,Chen Z B,et al.Experiment and application of mini vibrators seismic exploration in oil shale.Journal of Jilin University(Earth Science Edition),2012;42(3):265—270
    10 陈祖斌,腾吉文,林君,等.电磁式可控震源-大地耦合过程中的非线性特征分析.中国科学(D辑地球科学),2005;35(4):333 —339Chen Z B,Teng J W,Lin J,et al.Nonlinear analysis on the coupling process of electromagnetic vibrator and earth.Science in China(Series D:Earth Sciences),2005;35(4):333—339
    11 段云卿.匹配滤波与子波整形.石油地球物理勘探,2006;41(2):156—159Duan Y Q.Matched filtering and wavelet shaping.OGP,2006;41(2):156—159
    12 李晨晨,徐世光,吴静,等.昆明市南市区软土内摩擦角与各物理指标之间的相关关系分析.科学技术与工程,2014;14(3):243—245Li Chenchen,Xu Shiguang,Wu Jing,et al.The analysis of the correlativity between the internal frictional angle and physical parameter of the soft soil in the south city,Kunming,Yunnan Province.Science Technology and Engineering,2014;14(3):243—245

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