转换波处理中共转换点的定位  

Positioning of common converted point in the processing of conver-ted-wave data.

作　　者：毕丽飞[1,2] 李振春[2] 王延光[1] 石建新[1] 夏吉庄[1] 王慧[1] 乔玉雷[1] 

机构地区：[1]中国石化胜利油田物探研究院 [2]石油大学(华东)地球资源与信息学院,山东东营257100

出　　处：《勘探地球物理进展》2005年第5期353-356,共4页Progress in Exploration Geophysics

摘　　要：共转换点(CCP)定位是转换波资料处理中的关键环节。但由于转换波射线路径具有明显的不对称性,且转换点坐标是深度、炮检距、纵横波速度及倾角等多种因素的函数,使得CCP的定位十分困难。给出了计算CCP坐标的基本原理,根据原理和目标区的地质构造特点,通过时变、空变划分时窗,设计了CCP定位前的转换波处理流程,对沾化凹陷罗42井区8条二维测线进行试处理,实现了真正的CCP叠加,收到了较满意的效果。The positioning of common converted point is a key step in the processing of converted wave data. It is difficult to locate CCP exactly due to the asymmetry of converted wave ray-path and the dependency of CCP on depth, offset, P-wave velocity, and S-wave velocity. We firstly discussed the different kinds of factors influencing the location of CCP and computation of the coordinates of CCP. And then we set up a workflow of converted-wave data processing. Finally, we processed 8 2-D lines from Luo 42 well area in Zhanhua sag. Desired results have been reached.

关 键 词：转换波射线路径 CCP定位 资料处理 纵波速度 横波速度 

分 类 号：P631.4[天文地球—地质矿产勘探]