Accurate Source-Receiver Positioning Method for a High-Resolution Deep-Towed Multichannel Seismic Exploration System  

作　　者：LI Jing LIU Kai WEI Zhengrong ZHANG Liancheng LIU Yangting PEI Yanliang LIU Chenguang LIU Baohua 

机构地区：[1]Key Laboratory of Marine Geology and Metallogeny,First Institute of Oceanography,MNR,Qingdao 266061,China [2]Laboratory for Marine Geology,Laoshan Laboratory,Qingdao 266061,China [3]College of Ocean Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China [4]Key Laboratory of Fluid Transmission Technology of Zhejiang Province,Zhejiang Sci-Tech University,Hangzhou 310018,China

出　　处：《Journal of Ocean University of China》2024年第2期415-426,共12页中国海洋大学学报（英文版）

基　　金：supported by the special funds of Laoshan Laboratory(No.LSKJ202203604);the National Key Research and Development Program of China(No.2016 YFC0303901).

摘　　要：The near-seabed multichannel seismic exploration systems have yielded remarkable successes in marine geological disaster assessment,marine gas hydrate investigation,and deep-sea mineral exploration owing to their high vertical and horizontal resolution.However,the quality of deep-towed seismic imaging hinges on accurate source-receiver positioning information.In light of existing technical problems,we propose a novel array geometry inversion method tailored for high-resolution deep-towed multichannel seismic exploration systems.This method is independent of the attitude and depth sensors along a deep-towed seismic streamer,accounting for variations in seawater velocity and seabed slope angle.Our approach decomposes the towed line array into multiline segments and characterizes its geometric shape using the line segment distance and pitch angle.Introducing optimization parameters for seawater velocity and seabed slope angle,we establish an objective function based on the model,yielding results that align with objective reality.Employing the particle swarm optimization algorithm enables synchronous acquisition of optimized inversion results for array geometry and seawater velocity.Experimental validation using theoretical models and practical data verifies that our approach effectively enhances source and receiver positioning inversion accuracy.The algorithm exhibits robust stability and reliability,addressing uncertainties in seismic traveltime picking and complex seabed topography conditions.

关 键 词：high-resolution deep-towed multichannel seismic exploration source-receiver positioning array geometry inversion seawater heterogeneity seabed slope angle 

分 类 号：P631.4[天文地球—地质矿产勘探]