三维叠前深度偏移的CRP道集速度扫描分析技术及应用  

Velocity-scanning analyzed technique in CRP gather of 3-D prestack depth migration and its application.

作　　者：王棣[1] 匡斌[1] 孟祥宾 何英 胡中标[1] 

机构地区：[1]同济大学海洋地质与地球物理系

出　　处：《石油地球物理勘探》2002年第6期615-619,共5页Oil Geophysical Prospecting

摘　　要：三维共反射点 (CRP)道集百分比扫描技术 ,是一种基于剥层法的叠前深度偏移速度分析方法。通过对层速度模型做均匀扫描 ,得到不同速度下克希霍夫深度偏移后的 CRP道集 ,从道集中直接观察和拾取使同相轴拉平的正确速度和深度 ,就可以对原来的速度—深度模型进行修正。这种方法不受地下构造复杂程度和任何假设条件的限制 ,分析速度快 ,精度高 ,在胜利油田The percentage scanning technique of 3 D CRP(Common Reflection Point) gathers is a velocity analysis method of prestack depth migration based on layer stripping.The CRP gathers after Kichhoff depth migration in different velocity can be obtained through uniform scanning of interval velocity model.The original velocity depth model can be updated by direct observing and picking up correct velocities and depths that align the events from the CRP gather.The method does not be restricted by complexity of underground structure and any by hypothetical conditions and has advantages of fast analyzing speed and high precision,which has been successfully applied to 3 D Kichhoff prestack depth migration processing in CB30 area of Shengli Oilfield.

关 键 词：三维叠前深度偏移 CRP道集 速度扫描分析技术 应用 速度百分比 地震勘探 

分 类 号：P631.443[天文地球—地质矿产勘探]