散射地震二维观测系统研究  

Research on 2D Seismic Scattering Observation System

作　　者：申语桐 戴世坤[1,2,3] 李昆 赵东东[1,2,3] 凌嘉宣[1,2,3] SHEN Yutong;DAI Shikun;LI Kun;ZHAO Dongdong;LING Jiaxuan(School of Geosciences and Info-Physics, Central South Univerty,Changsha Hunan 410083;Key Laboratory of MetallogenicPrediction of Nonferrous Metals and Geological Environment Monitoring(Central South University), Ministry of Education,Changsha Hunan 410083;Hunan Key Laboratory of Nonferrous Resources and Geological Hazards Exploration,ChangshaHunan 410083)

机构地区：[1]中南大学地球科学与信息物理学院,湖南长沙410083 [2]有色金属成矿预测与地质环境监测教育部重点实验室(中南大学),湖南长沙410083 [3]有色资源与地质灾害探查湖南省重点实验室,湖南长沙410083

出　　处：《河南科技》2019年第2期147-152,共6页Henan Science and Technology

基　　金：中南大学研究生自主探索创新项目(2018zzts203)

摘　　要：传统地震观测系统以反射波理论(即假设地下介质为均匀层状介质)为基础,常用的有共中心点(CMP)、共反射点(CDP)观测系统等。随着勘探的不断深入,对勘探效果和效率提出了更高的要求。目前,工程地质调查中常用的观测系统需要布设大量接收点并进行多次移动,工作成本高且效率低。针对这一问题,本文进行了散射地震观测系统的探索研究,基本思路为以散射理论(即假设地下介质为散射点的集合)为核心,在实现二维频域数值模拟和全波形反演的基础上,设计模型和二维散射地震勘探观测系统,研究观测系统中道间距、炮间距等参数变化对勘探效果的影响。试验结果表明,相较于传统反射地震观测系统,散射观测系统只需要少量的激发点和接收点便能得到较好的勘探效果,有利于降低工作成本、提高工作效率。The traditional seismic observation system is based on the theory of seismic reflected waves(which is assuming that the underground medium is horizontal layered),such as CMP and CDP.With the deepening of exploration,higher requirements are put forward for exploration effect and efficiency.In the current engineering geological survey,the observation systems need to deploy a large number of detectors and carry out multiple movements,so the work cost is high and the efficiency is low.Aiming at this problem,this paper was based on the scattering theory(which is assuming that the underground medium wasthe set of scattering points)and conducts an exploration study of the seismic scattering observation system,researching the influence of track interval and shot interval.The experimental results showed that,compared with the traditional reflection seismic observation system,the scattering observation system only needed a small number of excitation points and receiving points to achieve better exploration results,which was conducive to reducing work costs and improving work efficiency.

关 键 词：地震勘探 散射地震 全波形反演 

分 类 号：P631.4[天文地球—地质矿产勘探]