石油地球物理勘探2024，Vol.59Issue(3)：415-423,9.DOI:10.13810/j.cnki.issn.1000-7210.2024.03.004
浅海地震采集缆—源空间组合对激发子波特性的影响分析
Analysis of influence of cable-source spatial combination on excitation wavelet behavior in seismic acquisition of shallow sea
摘要
Abstract
The low resolution of seismic data is a prominent problem in the current deep seismic exploration in Bohai Sea.In order to solve this problem,it is necessary to find breakthroughs in seismic acquisition,especially in the source design.However,there are few reports on the research of spatial combination of the streamer and source in shal-low water conditions of Bohai Sea.This paper firstly analyzes the characteristics of air gun pulse propagation in shal-low water conditions of Bohai Sea and determines the main factors affecting the air gun pulse propagation.Then,the paper simulates the single gun wavelet in shallow water based on the non-ideal gas condition air gun wavelet model,studied the spectral characteristics of the wavelet by considering the streamer ghost,and proposes the method of evaluating the source performance with the wavelet including streamer ghost.Secondly,based on the actual geo-graphical and geological conditions in Bozhong area of Bohai Sea,the paper designs the simulation tests of different cable-source sinking depth combinations and source plane distribution and analyzes systematically the influence law of spatial combination of the streamer and source on wavelet and its frequency spectrum under the condition of shal-low water in Bohai Sea.Finally,the paper applies the summarized law understanding and source design technology to the secondary data acquisition of Bozhong and compares the new and old three-dimensional towing cable single shot in Bozhong area,which verifies the correctness of the proposed method.The research results have a certain guiding significance for the optimal design and evaluation of air gun sources in the shallow water area of Bohai Sea.关键词
浅水/气枪子波/拖缆沉放深度/震源沉放深度/震源平面展布Key words
shallow water/air gun wavelet/streamer depth/source depth/source plane distribution分类
天文与地球科学引用本文复制引用
周东红,徐德奎..浅海地震采集缆—源空间组合对激发子波特性的影响分析[J].石油地球物理勘探,2024,59(3):415-423,9.基金项目
本项研究受中海石油(中国)有限公司"七年行动计划"重大科技专项"渤海油田稳产3000万吨,上产4000万吨关键技术研究"(CNOOC-KJ135 ZDXM 36 TJ)资助. （中国）
