任意V（z）DMO处理技术在大港深层地震资料处理中的应用

本文在对常速频域DMO和倾角分解DMO进行分析的基础上,对任意V（z)DMO进行了初步探讨,与常速DMO相比,任意V（z)DMO更接近实际地质情况,其脉冲响应不再是简单的SMILE椭圆,依据速度场情况,其响应很难用解析式表达,通过对大港地区地震资料的处理结果,表明任意V（z)DMO方法更能适应速度变化较大的情况,因而对延伸较长的大倾角绕射和反射能够达到更好的成像效果。

Application of DMO processing technique for any V(z) in deep seismic data processing in Dagang Oilfield.

On the basis of analysis of DMO in frequency domain of constant velocity and DMO with dip angle decomposition,the paper has preliminary discussion of DMO under any V(z) circumstances.Comparing with DMO in constant velocity,DMO in any V(z) is more close to real geologic condition,its pulse response is no more simple "SMILE" ellipse and difficult express in analytic expression in a condition of velocity field.It is showed by seismic data processing in Dagang District that DMO method for any V(z) is more suitable for severe variation in velocity and therefore has a better imaging results in diffraction and reflection that have steep dip angle and longer extension.