论文部分内容阅读
“波动迭加”是在共炮点选排或共检波点选排范围内的任意迭加,其时差与时间无关。由原始资料的许多球面波前的迭加合成一种特殊的波前。与共中心点迭加不同,波动迭加保留了波场采样的重要性质,照此而论,波动方程可以处理以前难于解决或不可能解决的问题。由波动迭加合成的倾斜下行平面波产生的野外资料的地震剖面,与共中心点迭加相似。其信噪比介于单次偏移和中心点迭加剖面之间。倾斜平面波迭加对角度的选择能力可以检测在中心点迭加或原始选排上不明显的反射层。斜坐标系中的简单速度估计只是在细节上与标准坐标系不同。由于已经作了斜平面波迭加资料的波场特性,可用波动方程技术把偏移及速度估计推广到有强烈横向速度变化的排列范围内。
“Volatile Diego” is a random overlay within the range of selected shots or co-ordinated shots. The time difference is independent of time. A special wavefront is synthesized from the superposition of many spherical wavefronts of the source material. Different from the common center point, the superposition of waveforms preserves the important properties of wavefield sampling. In this case, the wave equation can deal with the previously difficult or impossible problems. The seismic profiles of the field data generated by the oblique descending plane waves synthesized by the superposition of fluctuations are similar to those of the common center points. The signal-to-noise ratio lies between the single offset and the center-point superimposed profile. Tilt plane wave superimposed on the ability to select the angle of detection can be superimposed on the center of the original or the original row is not obvious reflective layer. Simple speed estimation in oblique coordinate systems is only different in detail from the standard coordinate system. Due to the wavefield properties of the data obtained from the superimposition of oblique-plane waves, the migration and velocity estimation can be generalized to the range of intense lateral velocity changes using the wave equation technique.