基于纵波约束的转换波静校正  

Converted Wave Static Correction Based on P-wave Constraint

作　　者：朱常规 何兵寿[1] 

机构地区：[1]中国海洋大学海底科学与探测技术教育部重点实验室,山东青岛266100

出　　处：《中国煤炭地质》2016年第5期61-66,共6页Coal Geology of China

基　　金：国家自然科学基金资助项目(41174087;41204089);国家科技重大专项项目(2011ZX05005-005);863项目(2013AA064201)

摘　　要：在转换波地震勘探中,由于转换波速度低、信噪比差、初至拾取难度大,常规的纵波静校正方法不能有效地解决转换波静校正问题。从同一构造层的纵波和横波的叠加剖面在同相轴上具有相似特征的角度出发,利用速度比进行P-P波拉伸,使之与P-SV波达到同一时间层上,然后匹配校正相应的P-SV波数据,得到P-SV波的长波长静校正量,最后用互相关的方法计算P-SV波的短波长静校正量。利用这种方法对西部某地区地震资料进行了转换波静校正量的求取,并取得了较好的效果。In converted wave seismic prospecting, since the issues of low converted wave velocity, poor signal-noise ratio and hard to pick first arrival, thus conventional P-wave static correction can not solve converted wave static correction issue effectively. Start from same structural layer P-wave and S-wave stacked sections have similar features on lineups angle of view, the paper has used velocity ratio carried out P-P waves stretching, made them arriving at a same temporal sequence with the P-SV waves, then matching and correcting corresponding P-SV wave data, obtained P-SV wave long wavelength statics. Finally uses mutual correlation to figure out P-SV wave short wavelength statics. Through the method has carried out converted wave statics acquisition from seismic data of a western prospecting area with good result.

关 键 词：转换波 静校正 构造时间 互相关 

分 类 号：P631.4[天文地球—地质矿产勘探]