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一、多次复盖的特性曲线多次复盖对压制多次反射波的作用,一般都是用特性曲线来表示。计算特性曲线时,一种是把地震波假设为连续振动的谐波(石油物探一九七二年第一期的《地震共反射点多次迭加法》一文),一种是把地震波看成是一个脉冲波。前者所得的特性曲线称为谐波特性曲线,后者称为脉冲特性曲线,两者有一些差异。我们把四次复盖端点放炮的谐波特性曲线和脉冲特性曲线(脉冲为瑞克子波)示于图1。为了便于理解,图1横坐标采用α和(δt_(max))/T~*两种变数。δt_(max)为多次波在最大炮检距上的剩余时差,T~*为
First, many times covering the characteristic curve Multiple coverage of the suppression of the role of multiple reflections, are generally used to represent the characteristic curve. When calculating the characteristic curve, one is to assume the seismic wave as a continuous harmonic wave (Geophysical Prospecting Point Multiple Stacked Method in the first issue of Geophysical Prospectus, 1972), and one is to consider the seismic wave as A pulse wave. The former characteristic curve is called the harmonic characteristic curve, the latter is called the pulse characteristic curve, there are some differences between the two. We show the harmonic characteristic curve and pulse characteristic curve (pulsed Rick wavelet) of the four shots covering the end point in Figure 1. In order to facilitate understanding, Figure 1 abscissa using α and (δt_ (max)) / T ~ * two variables. δt_ (max) is the residual time difference of multiples at the maximum offset, T ~ * is