石油地球物理勘探2025，Vol.60Issue(2)：362-368,7.DOI:10.13810/j.cnki.issn.1000-7210.2025.02.20240023
直达波标定的水陆检数据上下行波场分离方法
A method of the dual-sensor seismic data up-going and down-going wavefields separation on the direct wave calibration
摘要
Abstract
With the development of offshore oil and gas exploration and development,the application of dual-sensor ocean bottom receivers is becoming more and more extensive.As a key technology of dual-sensor seis-mic data processing,the separation of the up-going and down-going wavefields determines data processing qua-lity.In response to the failure of conventional methods to complete separation of up-going and down-going wavefields(up-going wavefields separated include some of the down-going wavefields,and the down-going wavefields separated also include some of the up-going wavefields),this paper proposes a separation method of up-going and down-going wavefields for dual-sensor seismic data based on direct wave calibration.First,the spatial weighted function of the dual-sensor seismic data is calculated by using the dual-sensor direct waves in the frequency-space domain.Then the calibration filter operator of the dual-sensor seismic data is directly com-puted by using the dual-sensor seismic data with and without direct waves in the time-space domain.Finally,the dual-sensor seismic data is calibrated,and up-going and down-going wavefields are processed.The data examples demonstrate the effectiveness and practicality of the proposed method.The separated up-going wave-field data not only eliminates the interference of the ghost multiples but also improves the signal-to-noise ratio and resolution of seismic data.The method provides high-fidelity up-going and down-going wavefield data for subsequent joint deconvolution and migration imaging processing.关键词
水陆检数据/直达波/标定/分离/上行波场/下行波场Key words
dual-sensor seismic data/direct wave/calibration/separation/up-going wavefield/down-going wavefield分类
地质学引用本文复制引用
高少武,宋强功,孙鹏远,于万辉,李培明,邹振..直达波标定的水陆检数据上下行波场分离方法[J].石油地球物理勘探,2025,60(2):362-368,7.基金项目
本项研究受中国石油集团公司项目"地震处理解释关键新技术与智能化软件研发"(2021ZG03)和"海洋节点(OBN)地震数据处理软件开发"(2021ZG02)联合资助. （2021ZG03）
