基于参数多级优化的共反射面叠加方法及其应用
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摘要
基于 Hubral共反射面叠加的思想 ,考虑到计算效率和成像精度 ,本文提出了参数多级优化的共反射面叠加方法。这是一种不依赖于宏观速度场 ,仅需已知近地表速度和依赖于波场三参数的地震成像方法。它不仅能够改进模拟零炮检距剖面 ,提高深层的信噪比 ,而且可以给出用于反演速度场的地震三参数剖面。通过凹陷模型和 Marmousi模型的试算以及胜利油田实际资料的试处理 ,验证了本文方法的有效性和实用性。
Taking computational efficiency and imaging accuracy into consideration,we put forward the common reflection surface (CRS) stack method of multi level optimization of parameters based on the idea of Hurbral's CRS stack.CRS stack is a seismic imaging method that does not depend on a macro velocity model and only need to know near surface velocity and relies on three wavefield parameters.It not only improves the quality of simulated zero offset section and S/N ratio in deeper layers but also provides important seismic three parameters section which can be used for inversion of a macro velocity model.The effectiveness and practicability of the method is proved by applying it to depression model,Marmousi model and real seismic data in Shengli Oilfield.
Taking computational efficiency and imaging accuracy into consideration,we put forward the common reflection surface (CRS) stack method of multi level optimization of parameters based on the idea of Hurbral's CRS stack.CRS stack is a seismic imaging method that does not depend on a macro velocity model and only need to know near surface velocity and relies on three wavefield parameters.It not only improves the quality of simulated zero offset section and S/N ratio in deeper layers but also provides important seismic three parameters section which can be used for inversion of a macro velocity model.The effectiveness and practicability of the method is proved by applying it to depression model,Marmousi model and real seismic data in Shengli Oilfield.
引文
[1] HubralP.Com puting true amplitude reflections in alaterally inhomogeneous earth.Geophysics,1983,48(8):1052～1062
[2] CruzJ C R,HubralP,TygelM,SchleicherJ andHochtG.The com mon reflecting elem ent(CRE)m ethod revisited.Geophysics,2000,65(3):979～993
[3] HubralP,HochtG andJagerR.Seismic illumination.TheL eadingEdge,1999,18(11):1168～1171
[4] JagerR,MannJ,HochtG andHubralP.Com mon- re-flection- surface stack:Im age and attributes.Geo-physics,2001,66(1):97～109
[5] MullerT,JagerR andHochtG.Comm on reflectionsurface stacking method-Imaging with an unknownvelocity model.68thAnnInternatMtgSocExplGeo-phys,ExpandedAbstracts,1998,1764～1767
[6] ThoreP D,deBazelaireE andRayM P.Three- param-eter equation:An efficient tool to enhance the stack.Geophysics,1994,59(2):297～30
[2] CruzJ C R,HubralP,TygelM,SchleicherJ andHochtG.The com mon reflecting elem ent(CRE)m ethod revisited.Geophysics,2000,65(3):979～993
[3] HubralP,HochtG andJagerR.Seismic illumination.TheL eadingEdge,1999,18(11):1168～1171
[4] JagerR,MannJ,HochtG andHubralP.Com mon- re-flection- surface stack:Im age and attributes.Geo-physics,2001,66(1):97～109
[5] MullerT,JagerR andHochtG.Comm on reflectionsurface stacking method-Imaging with an unknownvelocity model.68thAnnInternatMtgSocExplGeo-phys,ExpandedAbstracts,1998,1764～1767
[6] ThoreP D,deBazelaireE andRayM P.Three- param-eter equation:An efficient tool to enhance the stack.Geophysics,1994,59(2):297～30
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