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分析第三纪砂页岩地层中的速度谱时,在剖面深部有时会出现异常的高速同相轴,具有高的相关系数。这些同相轴的一个来源可能是绕射源。图1表示计算速度的排列中心在绕射源正上方的一个模型;该绕射源的作用,好似共反射点反射。计算得到了所预期的速度7500呎/秒。图2,计算速度的排列中心在地面离绕射源垂直地面的投影点的水平距离为6000呎。分析图2的结果速度有些偏高,同时改变速度、深度和偏离距将得
When analyzing the velocity spectrum in the Tertiary sand shale formation, anomalous high-velocity events sometimes occur in the deep part of the profile with high correlation coefficients. One source of these events may be the diffraction source. Figure 1 shows a model whose velocity center is on the diffractive source; the diffractive source functions as a reflection of the common reflection point. Calculated the expected speed of 7500 feet / second. Figure 2, the calculation speed of the center of arrangement in the ground vertical distance from the projection point of the diffraction surface of the horizontal distance of 6000 feet. The result of the analysis of Figure 2 is somewhat higher in speed while changing the speed, depth, and offset