克希霍夫三维DMO叠加在地震资料处理中的应用
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摘要
一个炮点和一个检波点接收的一道地震记录上某一时刻振幅值 ,它可能来自地下一个椭圆面上各个点的反射 ,该椭圆面以炮点和检波点为焦点 ,炮点和检波点的连线为长轴。因此 ,在叠加时 ,该振幅值就不是只在共中心点 (CMP)上相加 ,而应该在椭圆面上各个点相加 (当然 ,在不同点上振幅值是变化的 )。这种叠加方法实现了共反射点叠加 ,有利于叠加成像 ,也有利于提高分辨率和信噪比。这就是克希霍夫求和法。
The amplitude values at a certain moment in a seismic record received at a shotpoint and a detection point might come from reflections of various points on an underground ellipsoid, which has the shotpoint and the detection point as its focuses, and the connected line of the shotpoint point and the detection point as its major axis. When stacking is performed, such amplitude values should be added at various points on the ellipsoid instead of being merely added at the CMP. Of course, the amplitude values are different at different points. The utilization of such a stacking method can realize the stacking of common reflection points, and is hence conducive to the stacking image formation and also to the improvement of resolution power and the signal to noise ratio.
The amplitude values at a certain moment in a seismic record received at a shotpoint and a detection point might come from reflections of various points on an underground ellipsoid, which has the shotpoint and the detection point as its focuses, and the connected line of the shotpoint point and the detection point as its major axis. When stacking is performed, such amplitude values should be added at various points on the ellipsoid instead of being merely added at the CMP. Of course, the amplitude values are different at different points. The utilization of such a stacking method can realize the stacking of common reflection points, and is hence conducive to the stacking image formation and also to the improvement of resolution power and the signal to noise ratio.
引文
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