任意V(z)DMO处理技术在大港深层地震资料处理中的应用
|
摘要
李国发 ,牟永光 ,戴东 ,关丽梅 ,梁奇 ,张武斌 .任意 V(z) DMO处理技术在大港深层地震资料处理中的应用 .石油地球物理勘探 ,2 0 0 1,36 (6 ) :6 6 5～ 6 71 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 SMIL E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。
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.
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.
引文
[1] HaleI D.Dip- moveout byFourier transform.Geophysics,1984,49:741～757
[2] JakubowiczH.A simple efficient method of dip- moveout correction.GeophysicalProspecting,1990,38:221～245
[3] ShahP M.Use of wavefront curvature to relate seimic data with subsurface parameter.Geophysics,1973,38:812～825
[4] HansA M.3-D Time- variant dip moveout by the f- k method.Geophysics,1993,58:1030～1041
[5] KeithH.The challenge presented byNorthSea central graben salt domes to allDMO algorithms.FirstBreak,1994,12:327～343
[6] MichelD.Migration to zero offset(DMO) for a constant velocity gradient:an analytical formulation.Geo-physicalProspecting,1993,41:612～643
[7] 田希泰译.论DMO.国外油气勘探,1990,2(2):26～43
[2] JakubowiczH.A simple efficient method of dip- moveout correction.GeophysicalProspecting,1990,38:221～245
[3] ShahP M.Use of wavefront curvature to relate seimic data with subsurface parameter.Geophysics,1973,38:812～825
[4] HansA M.3-D Time- variant dip moveout by the f- k method.Geophysics,1993,58:1030～1041
[5] KeithH.The challenge presented byNorthSea central graben salt domes to allDMO algorithms.FirstBreak,1994,12:327～343
[6] MichelD.Migration to zero offset(DMO) for a constant velocity gradient:an analytical formulation.Geo-physicalProspecting,1993,41:612～643
[7] 田希泰译.论DMO.国外油气勘探,1990,2(2):26～43
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心