Ray‐based reflection traveltime tomography using approximate stationary points

Li Xiangyue; Min Dong‐Joo; Hwang Jongha; Oh Ju‐Won

摘要

ABSTRACT > Reflection traveltime tomography has been used to describe subsurface velocity structures which, in practice, can be used as a background or initial model for pre‐stack depth migration or full waveform inversion. Conventional reflection traveltime tomography is performed by solving an optimization problem based on a ray‐tracing method. As a result, reflection traveltime tomography requires heavy computational efforts to carry out ray tracing and solve a large matrix equation. In addition, like most data‐domain tomography methods, reflection traveltime tomography depends on initial guesses and suffers from non‐uniqueness and uncertainty of solutions. In this research, we propose a deterministic ray‐based reflection traveltime tomography method by applying seismic interferometry. This method does not suffer from the non‐uniqueness problem and does not require a priori information on subsurface media. By adding a virtual layer (whose properties are known) on top of the real surface and applying convolution‐type interferometry, we approximately determine the stationary points (i.e., incident raypaths in the virtual layer). Then, we generate reflection points for a range of assumed velocities and estimate the velocity by considering the number of reflection points and the traveltime difference between the observed and calculated data. The reflection surface can then be recovered by using the estimated velocity. Once the first target layer is resolved, we can recover the whole media by recursively applying the same method to the lower layers. Numerical examples using surface seismic profile data for homogeneous‐layer (with a low‐velocity layer) and inhomogeneous‐layer models and real field data experiments on the Congo data set demonstrate that our method can successfully recover the velocities and depths of subsurface media without initi </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“main”XML：Lang =“en”> <标题类型=“main”>抽象</ title> >反射旅行时间断层扫描已被用于描述在实践中可以使用的地下速度结构作为预堆叠深度迁移或全波形反转的背景或初始模型。通过基于光线跟踪方法解决优化问题来执行传统的反射行程断层扫描。结果，反射旅行时间断层扫描需要重量的计算努力来进行射线跟踪并解决大矩阵方程。此外，与大多数数据域断层扫描方法一样，反射旅行时间断层扫描取决于初始猜测和遭受不统一性和解决方案的不确定性。在这项研究中，我们通过应用地震干涉测量来提出基于确定的基于射线的反射行程断层扫描方法。该方法不会遭受非唯一性问题，并且不需要有关地下介质的先验信息。通过在真实表面的顶部添加虚拟层（已知其属性）并应用卷积型干涉测量，我们大致确定静止点（即，虚拟层中的入射射线路径）。然后，我们通过考虑观察点和所观察到的数据之间的旅行时间差来产生一系列假定速度的反射点并估计速度。然后可以通过使用估计的速度来回收反射表面。一旦第一个目标层被解析，我们就可以通过递归地将相同的方法递归到下层来恢复整个媒体。数值例子使用均匀层（具有低速层）和不均匀层模型和刚果数据集的真实场数据实验的数值示例表明，我们的方法可以在没有初始的情况下成功恢复地下媒体的速度和深度 </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-25702/'>《Near surface geophysics》</a> <b style="margin: 0 2px;">|</b><span>2019年第5期</span><b style="margin: 0 2px;">|</b><span>共15页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Li Xiangyue&option=202" target="_blank" rel="nofollow">Li Xiangyue;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Min Dong‐Joo&option=202" target="_blank" rel="nofollow">Min Dong‐Joo;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Hwang Jongha&option=202" target="_blank" rel="nofollow">Hwang Jongha;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Oh Ju‐Won&option=202" target="_blank" rel="nofollow">Oh Ju‐Won;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Department of Energy Systems EngineeringSeoul National University1 Gwanak‐ro Gwanak‐gu Seoul 08826 Republic of Korea;</p> <p>Department of Energy Systems EngineeringSeoul National University1 Gwanak‐ro Gwanak‐gu Seoul 08826 Republic of Korea;</p> <p>Department of Energy Systems EngineeringSeoul National University1 Gwanak‐ro Gwanak‐gu Seoul 08826 Republic of Korea;</p> <p>Department of Resources and Energy EngineeringChonbuk National University567 Baekje‐daero Deokjin‐gu Jeonju‐si Jeollabuk‐do 54896 Republic of Korea;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/163.html" title="地球物理学">地球物理学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Seismic inversion&option=203" rel="nofollow">Seismic inversion;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Ray tracing&option=203" rel="nofollow">Ray tracing;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Tomography&option=203" rel="nofollow">Tomography;</a> </p> <div class="translation"> 机译：地震反演;射线跟踪;断层扫描; 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Wang Qingping</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=王卿平&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,王卿平</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Liu Xinge&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,Liu Xinge</a> <span> <a href="/conference-cn-41705/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 第二届中国竹藤资源利用学术研讨会 </a> <span> <span> . -1</span> </span> </div> </li> <li> <div> <b>7. </b><a class="enjiyixqcontent" href="/academic-degree-domestic_mphd_thesis/020314424478.html">基于等效介质近似模型抗反射涂层的研究</a> <b>[A] </b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=张军&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 张军</a> <span> . 2013</span> </span> </div> </li> </ul> <ul style="display: none;"> <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/patent-detail/06120111965544.html">X射线计算机断层扫描装置及X射线计算机断层扫描摄像方法</a> <b>[P]</b> . <span> 中国专利： CN111948232A </span> <span> . 2020-11-17</span> </div> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/patent-detail/061202246163.html">使用迭代近似法的X射线计算机断层摄影装置(X射线CT装置)</a> <b>[P]</b> . <span> 中国专利： CN104039233B </span> <span> . 2016.10.12</span> </div> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/patent-detail/06130434102093.html">X-ray computed tomography device, e.g. medical X-ray computed tomography device, has X-ray data acquisition system for acquisition of X-ray projection data from X-rays based on types of number of X-ray data acquisition views per rotation</a> <b>[P]</b> . <span> 外国专利：  DE102006055408A1 </span> <span> . 2007-05-31</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：X射线计算机断层摄影设备，例如医用X射线计算机断层摄影设备，具有X射线数据采集系统，用于基于每转X射线数据采集视图的数量类型从X射线采集X射线投影数据 </span> </p> </li> <li> <div> <b>4. </b><a class="enjiyixqcontent" href="/patent-detail/06130416485272.html">Method, estimation unit and computer tomography system for computer tomography-based approximate determination of a vessel diameter</a> <b>[P]</b> . <span> 外国专利：  DE102013200163B4 </span> <span> . 2014-09-18</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：用于基于计算机断层摄影的血管直径的近似确定的方法，估计单元和计算机断层摄影系统 </span> </p> </li> <li> <div> <b>5. </b><a class="enjiyixqcontent" href="/patent-detail/06130431674049.html">Scattered beam screen for x-ray computer tomography scanner, has stationary ring detector and circulating x-ray focal spot for reduction scattered beam incident on ring detector</a> <b>[P]</b> . <span> 外国专利：  DE102007014815A1 </span> <span> . 2008-10-09</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：用于X射线计算机断层扫描仪的散射光束屏，具有固定的环形探测器和循环X射线焦点，用于减少入射在环形探测器上的散射光束 </span> </p> </li> </ul> </div> </div> </div> <div class="theme cardcommon" style="overflow: auto;display:none"> <h3 class="all_title" id="enpatent55">相关主题</h3> <ul id="subject"> </ul> </div> </div> </div> </div> <div class="right rightcon"> <div class="details_img cardcommon clearfix" style="margin-bottom: 10px;display:none;" > </div> </div> </div> <div id="thesis_get_original1" class="downloadBth" style="bottom: 19px;z-index: 999;" onclick="ywcd('0704023841431','4',7,2,1,'',this,24)" class="delivery" prompt="010401" title="通过人工服务将文献原文发送至邮箱" >获取原文</div> <div class="journalsub-pop-up" style="display: none"> <div class="journal-sub"> <h2>期刊订阅</h2> <img src="https://cdn.zhangqiaokeyan.com/img/loginclose.png" alt="关闭" onclick="$('.journalsub-pop-up').hide()"> <p 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