摘要
在尼日尔Agadem区块的地震数据连片处理过程中,由于采集年度、仪器、面元、地表条件等不同,三个工区的资料在覆盖次数、方位角、信噪比、相位等方面存在差异,处理过程中会出现空间假频、采集脚印等现象,引起偏移噪声,从而影响成像效果,因此需要对相关资料进行规则化处理,以消除这些差异及其影响。文中分析了不规则采样数据的频谱泄漏现象,介绍了GeoEast系统反泄漏傅里叶变换(ALFT)数据规则化的基本原理,给出了GeoEast利用ALFT技术进行地震数据规则化的基本步骤,并展示了该技术在尼日尔Agadem区块的地震资料连片处理中的应用效果。
During the multi-survey joint processing of seismic data on Block Agadem,Niger,spatial aliasing and acquisition footprints occur as different acquisition years,instruments,bins,and surface conditions result in the differences in fold,azimuth,signal-to-noise ratio,and phase among the data on the three work areas.Consequently,migration noise is induced and further affects the imaging effect.For this reason,the relevant data should be regularized to eliminate these differences and influences.This paper analyzes the spectral leakage of irregular sampled data,outlines the basic principle of data regularization based on the anti-leakage Fourier transform(ALFT)of the GeoEast system,presents the steps of seismic data regularization of the ALFT technology in GeoEast,and shows the application effect of this technology in the multi-survey joint processing of seismic data of Block Agadem in Niger.
作者
王艳香
徐兴荣
孟会杰
潘春孚
王建华
李东升
WANG Yanxiang;XU Xingrong;MENG Huijie;PAN Chunfu;WANG Jianhua;LI Dongsheng(Northwest Branch,Research Institute of Petroleum Exploration&Development,PetroChina,Lanzhou,Gansu 730020,China;China National Oil and Gas Exploration and Development Corporation,CNPC,Beijing 100034,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2022年第S02期23-28,224,共7页
Oil Geophysical Prospecting
基金
中国石油尼日尔公司项目“3D seismic data reprocessing services in block Agadem,Niger”(CNPCNP/10/2021-0091)
中国石油勘探与生产分公司科技项目“双复杂地区速度场研究与叠前偏移成像技术攻关试验”(2022KT1502)联合资助
关键词
傅里叶重构
数据规则化
地震成像
抗假频
三维连片处理
Fourier reconstruction
data regularization
seismic imaging
anti-aliasing
3D multi-survey joint processing
