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我们根据海上垂直地震剖面(VSP)数据的初至波,提出一种估算有效震源子波的简单方法这种方法利用赫姆霍兹方程的自由空间的格林函数,既运算简单又非常有效。我们显示了合成和实际的有偏及变井源距VSP数据的几个实例。 在合成的实例中,我们证实了当从参考数据中减去用估计的子波模拟的数据时具有小的剩余值。在实际数据的实例中,我们证实了在一种平滑的宏观模型中,当用实际数据估算的子波进行模拟时,实际数据和模型数据的初至波之间吻合良好。
Based on the first arrivals of VSP data, we propose a simple method to estimate the effective source wavelet. This method takes advantage of the Green’s function of the free space of the Helmholtz equation and is computationally simple and very efficient. We show several examples of synthetic and actual biased and well-spaced VSP data. In a synthetic example, we demonstrate that there is a small residual value when subtracting the data simulated with the estimated wavelet from the reference data. In the real data example, we show that in a smooth macro model, the first arrivals of the model data agree well with the model data when simulated with the wavelet estimated by the actual data.