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混合域三维vsp波动方程深度偏移方法

Keywords: 三维vsp,深度成像,分步傅里叶,波动方程

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Abstract:

?常规vsp成像方法利用vsp-cdp转换或基尔霍夫偏移,存在保幅性差及成像精度低等问题。混合域三维vsp波动方程深度成像方法是将vsp反射p波在深度域直接成像,利用分步傅里叶法在混合域进行波场外推,即在频率—波数域实现波场的相移,在频率—空间域实现时移校正。此法的优点在于能保持横向变速地质构造波动方程波场外推精度的同时提高计算效率。理论模型证明此方法可行,实际资料处理效果明显。

References

[1]  马在田著.地震成像技术—有限差分法偏移.北京:石油工业出版社,1989.[2]王华忠,徐蔚亚,王建民等.vsp数据波动方程叠前深度偏移成像及立体地震成像[j].石油地球物理勘探.2001,36(5):517-525??浏览[3]whitmorend,larryrlines.verticalseismicprofilingdepthmigrationofasaltdomeflank.geophysics,1986,51(5)6087~1109.[4]graziellakirtlandgrechm,lawtondcandscottcheadle.intergratedprestackdepthmigrationofverticalseismicprofileandsurfaceseismicdatafromtherockymountainfoothillsofsouthernalberta,canada.geophysics,2003,68(6)1782~179.[5]bellefleurg,whited,davist.p-waveimagingusing3-d-vspdatainvtimedia,weyburnfield,saskatchewancanada.expandedabstractsof74thannualinternalsegmtg,2004,2521~2524.[6]sheny,valasekp,kellyketal.3-dprestackreverse-timedepthmigrationappliedtoverticalcableseismicdata.expandedabstractsof70thannualinternalsegmtg,2000,762~765.
[2]  马在田著.地震成像技术—有限差分法偏移.北京:石油工业出版社,1989.
[3]  王华忠,徐蔚亚,王建民等.vsp数据波动方程叠前深度偏移成像及立体地震成像[j].石油地球物理勘探.2001,36(5):517-525??浏览
[4]  whitmorend,larryrlines.verticalseismicprofilingdepthmigrationofasaltdomeflank.geophysics,1986,51(5)6087~1109.
[5]  graziellakirtlandgrechm,lawtondcandscottcheadle.intergratedprestackdepthmigrationofverticalseismicprofileandsurfaceseismicdatafromtherockymountainfoothillsofsouthernalberta,canada.geophysics,2003,68(6)1782~179.
[6]  bellefleurg,whited,davist.p-waveimagingusing3-d-vspdatainvtimedia,weyburnfield,saskatchewancanada.expandedabstractsof74thannualinternalsegmtg,2004,2521~2524.
[7]  sheny,valasekp,kellyketal.3-dprestackreverse-timedepthmigrationappliedtoverticalcableseismicdata.expandedabstractsof70thannualinternalsegmtg,2000,762~765.

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