VSP倾角时差校正方法  

Dip-moveout correction of VSP data

作　　者：王成礼[1] 刘富贵[1] 李幼铭[2] 

机构地区：[1]胜利石油管理局物探公司,257100 [2]中国科学院地球物理所

出　　处：《石油地球物理勘探》1996年第1期35-40,166,共7页Oil Geophysical Prospecting

摘　　要：针对地下反射界面倾角较大时，VSPCDP变换和VSP偏移对反射点的归位效果均不理想这一问题，我们提出了VSP倾角时差校正方法。该方法是先将VSP资料进行倾角校正，然后再作VSPCDP变换，从而保证反射点的准确归位。文中基于射线理论分别导出了垂直非和斜井VSP倾角校正公式，并指出了实际应用时应注意的问题。实际资料处理的结果表明，该方法是有效的。Dip-moveout correction of VSP data is put forward to solve the problem thatVSP-CDP conversion and VSP migration are unsatisfactory when the seismic reflec-tors have quite big dip angle- The method makes VSP dip correction followed byVSP-CDP conversion to gUarantee correct position of seismic reflection points.VSP dip correction formulae for vertical and deviated boreholes are derivedfrom seismic ray theory,and some notices in using the formulae are mentioned indetail. Processing result of real seismic data shows the method feasible.

关 键 词：VSP 倾角校正 归位 射线 直井 斜井 

分 类 号：P631.4[天文地球—地质矿产勘探]