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由于ＶＳＰ与地面地震相比，具有反射振幅强、信噪比高、初至波清晰可辨的特点，并且ＶＳＰ和地面地震记录的都是地震反射波双程反射时间，故可利用ＶＳＰ的子波和频谱特性来改善地面地震的分辨率。地面地震与井眼地震（ＶＳＰ）常有不同的频率、相位、时间偏差及子波，为了确保地面地震资料的解释精度，必须用ＶＳＰ来刻度地面地震。将井眼地震参考道与过井地面地震道进行自相关，并分析其子波和频谱特征，设计一个匹配滤波器，并在一定频率范围内加以测试，然后通过频率滤波、相位旋转、时间移位和平滑处理，使ＶＳＰ与地面地震的频谱特征达到最佳匹配，最后用该滤波器对过井地震剖面进行滤波处理，即可提高剖面的分辨率。同样对井外的剖面也进行滤波处理，其分辨率也得到了提高。经理论分析和实际处理的剖面可知，运用ＶＳＰ提高地面地震分辨率是可信的，这为构造精细解释、储层研究和横向预测以及构造解释提供了精确的地震信息。

APPLICATION OF VSP IN HIGH-RESOLUTION PROCESSING

Ground seismic resolution can be improved by applying VSP wavelet and spectral property for VSP with the characteristics of stronger reflectance amplitude,higher signal-to-noise ratio,clearer first break than ground seismic factes and for what is recorded by VSP or ground seismic is two way time of seismic wave.Because of ground seismic and VSP with the various frequency,phaes,time deviation and wavelet,it is necessary using VSP to scale ground seismic to ensure the interpretation precision of ground seismic data.Profile resolution can be enhanced by autocorreting VSP reference trace with well-passing ground seismic trace,analysing its wavelet and spectral features,designing a matched filter and doing test in certain range;then doing frequency filtering,phase rotation,time displacement and smooth treatment to achieve the best match VSP with the spectral fecatures of ground seismic;finally filtering well-passing seismic section with the wave filter.Ground seismic resolution reliability enhanced by VSP is proved by theoretical analysis and processed sections and accurate seismic information is provided for careful structural interpretation,reservoir research and cross prediction.