论文部分内容阅读
在偏移成像中，通常要求记录和震源都在同一水平面内，然而实际观测经常遇到地形起伏的情况。当速度横向变化不大时，地形起伏对数据的影响可通过常规的静校正加以消除，但当速度横向变化较大时，再用常规的静校正来消除地形的影响就会有较大的误差。 本文基于波动方程，采用波场延拓的混合法来进行基准面校正。文中阐述了波动方程基准面校正的基本原理，给出了混合法波场延拓的一般公式，并就共炮点记录和零炮检距记录进行了计算，数值计算结果证实了该方法的有效性和准确性，可用于实际资料的处理。
In offset imaging, it is usually required that both the recording and the source be in the same horizontal plane. However, the actual observation often encounters topographic fluctuations. When the velocity changes little, the effect of the relief on the data can be eliminated by the conventional static correction. However, when the lateral velocity changes greatly, the conventional static correction will eliminate the influence of the terrain and there will be a big error . In this paper, based on the wave equation, wavefront continuation method is adopted to conduct the datum correction. In this paper, the basic principle of the calibration of wave equation datum is expounded, and the general formula of the wavefield extension in hybrid method is given. The common shot record and zero offset recording are calculated. The numerical results show that the method is effective Sexual and accuracy, can be used for the actual data processing.