基于初至波的定位数据质控技术  

Quality control technology of positioning data based on first break

作　　者：封楞楞 吴超[1] 李慧龙[1] 赵明 陈琳 赵彤 FENG Lengleng;WU Chao;LI Huilong;ZHAO Ming;CHEN Lin;ZHAO Tong(Geophysical Exploration Division,China Oilfield Services Co.,Ltd.,Tianjin 300459,China)

机构地区：[1]中海油田服务股份有限公司物探事业部,天津300459

出　　处：《石油地质与工程》2023年第2期8-12,20,共6页Petroleum Geology and Engineering

摘　　要：随着勘探技术的不断进步,地震资料采集方式的重点已经由拖缆采集逐步向海底电缆(OBC)及海底节点(OBN)采集转移。在OBC和OBN地震资料采集过程中,随着偏移距的不断增大,初至波除了是直达波,也可能是折射波和反射波。常用的线性动校正技术(LMO)只能对近偏移距初至波为直达波的定位数据进行质控,对于远偏移距定位数据无法进行质控。通过分析直达波、折射波或反射波的传播规律,将三者进行统一,提出了一种基于初至波的定位数据质控技术。该技术不仅能对近偏移距定位数据进行质控,还能对远偏移距定位数据进行质控,即实现全偏移距定位数据的质控。With the continuous progress of exploration technology,the focus of seismic data acquisition has gradually shifted from streamer acquisition to ocean bottom cable(OBC)and ocean bottom node(OBN)acquisition.During the process of OBC and OBN,with the increasing offset,the first arrival wave may be not only direct ones,but also refracted and reflected ones.The commonly used linear move out(LMO)technology can only control the quality of the positioning data with the near offset first arrival as direct ones,and cannot control the quality of the positioning data with the far offset.By analyzing the propagation law of direct,refracted or reflected ones and unifying the three,a positioning data quality control technology for first arrival is proposed.This technology can not only control the quality of near offset positioning data,but also control the quality of far offset,that is,to achieve the quality control of full offset positioning data.

关 键 词：初至波 线性动校正 定位数据质控 T-X域 

分 类 号：P631.42[天文地球—地质矿产勘探]