散射地震二维观测系统研究

详细信息    查看全文 | 推荐本文 |

英文篇名：Research on 2D Seismic Scattering Observation System 作者：申语桐 ; 戴世坤 ; 李昆 ; 赵东东 ; 凌嘉宣 英文作者：SHEN Yutong;DAI Shikun;LI Kun;ZHAO Dongdong;LING Jiaxuan;School of Geosciences and Info-Physics,Central South Univerty;Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring(Central South University), Ministry of Education;Hunan Key Laboratory of Nonferrous Resources and Geological Hazards Exploration; 关键词：地震勘探 ; 散射地震 ; 全波形反演 英文关键词：seismic exploration;;seismic scattering waves;;full waveform inversion 中文刊名：HNKJ 英文刊名：Henan Science and Technology 机构：中南大学地球科学与信息物理学院;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);有色资源与地质灾害探查湖南省重点实验室; 出版日期：2019-01-15 出版单位：河南科技 年：2019 期：No.664 基金：中南大学研究生自主探索创新项目(2018zzts203) 语种：中文; 页：HNKJ201902057 页数：6 CN：02 ISSN：41-1081/T 分类号：151-156

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.

引文

[1]陆基孟,王永刚.地震勘探原理[M].3版.青岛:中国石油大学出版社,2009.
    [2]熊章强,周竹生,张大洲.地震勘探[M].长沙:中南大学出版社,2010.
    [3]Aki K. Analysis of the seismic coda of local earthquakes as scattered waves[J]. Journal of Geophysical Research,1969(2):615-631.
    [4]Aki K,Richards PG. Quantitative Seismology[M]. California:W.H.Freeman,1980.
    [5]Wu R,Aki K. Scattering characteristics of elastic waves by an elastic heterogeneity[J]. Geophysics,2012(4):582-595.
    [6]吴如山,安艺敬一.地震波的散射衰减[M].李裕澈,卢寿德,等译.北京:地震出版社,1993.
    [7]孙明,林君.金属矿地震散射波场的数值模拟研究[J].地质与勘探,2001(4):68-70.
    [8]郭向宇,凌云,魏修成.近地表散射波的叠后衰减[J].石油地球物理勘探,2002(3):201-208.
    [9]杨旭明,周熙襄,王克斌,等.近地表地震散射噪声的正反演方法[J].石油物探,2002(3):312-316.
    [10]尹军杰.地震散射波场特征的数值模拟研究[D].北京:中国地质大学(北京),2005.
    [11]沈鸿雁.地震散射波成像技术研究[D].西安:长安大学,2010.
    [12]杜世通.地震波动力学理论与方法[M].青岛:中国石油大学出版社,2009.
    [13]徐世浙.地球物理中的有限单元法[M].北京:科学出版社,1994.
    [14]张钱江,戴世坤,陈龙伟,等.起伏地形条件下二维声波频率域全波形反演[J].Applied Geophysics,2015(3):378-388.
    [15]段秋枫.共轭梯度法的研究[D].南京:南京理工大学,2006.
    [16]Hestenes M R,Stiefel E. Methods of Conjugate Gradients for Solving Linear Systems[J].J.res.nat.bur.stand,1952(6):409-436.
    [17]Fletcher,Reeves,C.M. Function minimization by conjugate gradients[J]. Computer Journal,1964(2):149-154.
    [18]姚姚.地球物理反演基本理论与应用方法[M].武汉:中国地质大学出版社,2012.