层析成像法波动方程偏移

Tomography wave equation migration,

本文根据图像处理技术中的投影与重建原理——CT 技术,利用二维 Fou—rier 变换理论,从标量波动方程出发,推导了一套适用于地震数据处理的投影与重建表达式——CT 偏移公式。利用该公式对水平叠加地震剖面作叠后偏移处理,可得到常规偏移地震剖面和压制了干扰波或经过道间内插之后的偏移地震剖面;这种偏移方法适用于信噪比低或具有不等道间距的水平叠加地震剖面的偏移处理,并具有提高信噪比和元“边界反射”效应等优点。文中提供了用该方法对理论地质模型和实际地震资料处理的结果。

With the aid oboth the 2-D Fourier transform theory and the CT technique—projection and reconstruction principle in image processing, I use scalar wave equation to develop CT migration formulas—projection and reconstruction expressions for seismic data processing.Applying the formalas to the migration of a horizontal seismic stack section, I can obtain a conventional migration section,or a migration section without noise or with interpolated traces.This method is available to migrate the horizontal stack section which has low S/N ratio or unequal group intervals.It has advantages such as high S/N ratio,no“boundary reflection”effect and so forth.The theoretical and real data porcessing results obtained using this method are shown in this paper.