基于多次波逆时偏移的海洋垂直缆探测精度模拟  

Simulation study on the accuracy of ocean vertical cable detection based on multiples reverse time migration

作　　者：张子鑫 邢磊[1,2,3] 杨慧良 李倩倩 张洪茂 尉佳 刘鸿 ZHANG Zixin;XING Lei;YANG Huiliang;LI Qianqian;ZHANG Hongmao;WEI Jia;LIU Hong(Key Laboratory of Submarine Geosciences and Prospecting Techniques,MOE,College of Marine Geosciences,Ocean University of China,Qingdao 266100,China;Laboratory for Marine Mineral Resources,Qingdao Marine Science and Technology Center,Qingdao 266237,China;National Engineering Research Center of Offshore Oil and Gas Exploration,Beijing 100029,China;Qingdao Institute of Marine Geology,China Geological Survey,Qingdao 266237,China)

机构地区：[1]海底科学与探测技术教育部重点实验室,中国海洋大学海洋地球科学学院,青岛266100 [2]青岛海洋科技中心海洋矿产资源评价与探测技术功能实验室,青岛266237 [3]海洋油气勘探国家工程研究中心,北京100029 [4]中国地质调查局青岛海洋地质研究所,青岛266237

出　　处：《海洋地质前沿》2024年第7期80-86,共7页Marine Geology Frontiers

基　　金：中央高校基本科研业务费(202262008);国家重点研发计划项目(2022YFC2803503);国家自然科学基金(4227655);中国海洋大学研究生自主科研项目。

摘　　要：海洋垂直缆地震勘探是一种将水听器垂直布放到水中的探测新技术,与传统的拖缆地震勘探相比,具有高分辨率和高信噪比的优势。针对海洋垂直缆观测系统的不同造成的地震照明密度差异特点,采用多次波逆时偏移成像方法,对Marmousi模型进行基于声波方程的垂直缆地震采集正演模拟和成像处理,分析了垂直缆地震勘探方法的探测精度。结果表明,当垂直缆位于勘探区域的中部时,对勘探目标层的成像更为有利,对含有自由表面多次波的地震数据进行成像能有效增加地下的照明范围,使得高陡构造区域的成像结果更为清晰。该研究对海洋垂直缆地震勘探观测系统设计和高精度成像处理意义重大。Marine vertical cable seismic survey is a new exploration technology that deploys hydrophones vertically into the water.Compared with traditional streamer seismic survey,it has the advantages of high resolution and high signal-to-noise ratio.In view of the different characteristics of seismic illumination density duo to different marine vertical cable observation systems,the multiple reverse time migration imaging was used to conduct forward simulation and imaging process for vertical cable seismic acquisition based on acoustic wave equations for the Marmousi model,and the detection precision of vertical cable seismic exploration method was analyzed.Results show that when the vertical cable was located in the center of the exploration area,the imaging of the exploration target layer was most beneficial.Imaging seismic data that contain free surface multiples could effectively increase the underground illumination range,making imaging results clearer in high and steep structural areas.This research is of great significance to the design of marine vertical cable seismic exploration observation systems and high-precision imaging process.

关 键 词：垂直缆 逆时偏移 多次波 正演模拟 精度分析 

分 类 号：P736[天文地球—海洋地质]