TRAVELTIME

作品数：23被引量：20H指数：2
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相关作者：高正辉刘志强孙辉刘明忱韩复兴更多>>
相关机构：吉林大学中国矿业大学（北京）中国地震局地球物理研究所长江工程地球物理勘测武汉有限公司更多>>
相关期刊：《石油物探》《Earthquake Science》《Wuhan University Journal of Natural Sciences》《Earth and Planetary Physics》更多>>
相关基金：国家自然科学基金国家重点基础研究发展计划中国博士后科学基金更多>>
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A regression approach for seismic first-break picking
《Petroleum Science》2024年第3期1584-1596,共13页Huan Yuan San-Yi Yuan Jie Wu Wen-Jing Sang Yu-He Zhao 
financially supported by the National Key R&D Program of China(2018YFA0702504);the National Natural Science Foundation of China(42174152);the Strategic Cooperation Technology Projects of China National Petroleum Corporation(CNPC)and China University of Petroleum-Beijing(CUPB)(ZLZX2020-03);the R&D Department of China National Petroleum Corporation(2022DQ0604-01)。
The picking efficiency of seismic first breaks(FBs)has been greatly accelerated by deep learning(DL)technology.However,the picking accuracy and efficiency of DL methods still face huge challenges in low signal-to-nois...
关键词：First-break picking Low signal-to-noiseratio Regression BiLSTM TRAVELTIME Geometry Noisy seismic data 
Reflection-based traveltime and waveform inversion with second-order optimization被引量：5
《Petroleum Science》2022年第4期1582-1591,共10页Teng-Fei Wang Jiu-Bing Cheng Jian-Hua Geng 
supported by National Natural Science Foundation of China (42074157);the National Key Research and Development Program of China (2018YFC0310104);the Strategic Priority Research Program of the Chinese Academy of Science(XDA14010203)。
Reflection-based inversion that aims to reconstruct the low-to-intermediate wavenumbers of the subsurface model, can be a complementary to refraction-data-driven full-waveform inversion(FWI), especially for the deep t...
关键词：Reflection waveform inversion Reflection traveltime inversion Gauss-Newton HESSIAN 
Fast and accurate calculation of seismic wave travel time in 3D TTI media被引量：1
《Applied Geophysics》2021年第4期545-556,594,595,共14页Mao Yuan-Tong Zhao Ai-Hua 
funded by the National Key R&D Program of China (No. 2020YFA0710600);National Science Foundation of China (No. 41374098);the Special Fund of the Institute of Geophysics,China Earthquake Administration (No. DQJB19B40)
The Tilted tilted transversely isotropic(TTI)media,a kind of anisotropic medium,widely exists within the earth.For faster calculation of travel times in the TTI anisotropic media,we modifi ed a minimum traveltime tree...
关键词：TTI media ray tracing minimum traveltime tree algorithm minimum heap sorting parallel computation 
Application of topography fast marching method in landslide
《Global Geology》2021年第3期160-168,共9页YANG Junjie SUN Hui WEI Chengwu JIANG Zhenghong LI Meng 
Supported by projects of National Natural Science Foundation of China(No.41804100);Fundamental Research Funds for the Central Universities(No.2682018CX36);China Postdoctoral Science Foundation(No.2020T130080);China Postdoctoral Science Foundation(No.2018M640910).
Geophysical exploration methods are important tools for landslide disaster assessment,landslide treatment scheme design,and landslide prevention engineering.Seismic exploration,as an important geophysical exploration ...
关键词：fast marching method seismic exploration traveltime calculation LANDSLIDE TOPOGRAPHY 
Application of Snell's law in reflection raytracing using the multistage fast marching method
《Earthquake Research Advances》2021年第1期41-48,共8页Xingzhong Li Wei Zhang 
This research is jointly sponsored by National Natural Science Foundation of China(Grant No.U1901602);Shenzhen Key Laboratory of Deep Offshore Oil and Gas Exploration Technology(Grant No.ZDSYS20190902093007855);Shenzhen Science and Technology Program(KQTD20170810111725321);This study is also sponsored by the China Earthquake Science Experiment Project of China Earthquake Administration(Grant No.2018CSES0101).
Accurate calculations of travel times and raypaths of reflection waves are important for reflection travel time tomography.The multistage shortest path method(MSPM)and multistage fast marching method(MFMM)have been wi...
关键词：reflection raytracing Snell's law TRAVELTIME reflection angle 
Marchenko imaging based on self-adaptive traveltime updating
《Applied Geophysics》2020年第1期81-91,168,169,共13页Chen Xiao-Chun Hu Ye-Zheng Huang Xu-Ri Zhang Hou-Zhu Cao Wei-Ping Xu Yun-Gui Tang Jing 
supported by the National Natural Science Foundation of China(No.41874167);the National Science and Technology Major Project of China(No.2017YFB0202904);the National Natural Science Foundation of China(No.41904130)。
Marchenko imaging obtains the subsurface reflectors using one-way Green’s functions,which are retrieved by solving the Marchenko equation.This method generates an image that is free of spurious artifacts due to inter...
关键词：Marchenko imaging Marchenko equation Green’s function principle of equal traveltime self-adaptive traveltime updating 
Influences of coarse grid selection on Kirchhoff beam migration
《Global Geology》2019年第1期29-35,共7页LI Jiabin SUN Hui ZHANG Zhihou HAN Fuxing LIU Minchen 
Supported by projects of the Natural Science Foundation of China(No.41804100);the China Postdoctoral Science Foundation(No.2018M640910);the Fundamental Research Funds for the Central Universities(No.2682018CX36)
Kirchhoff beam migration is a beam migration method, which focuses on rapid imaging of geological structures. Although this imaging method ignores the amplitude information in the calculation process, it can calculate...
关键词：KIRCHHOFF BEAM MIGRATION prestack depth MIGRATION coarse GRID SELECTION BEAM propagator TRAVELTIME calculation 
Joint tomographic inversion of first-arrival and reflection traveltimes for recovering 2-D seismic velocity structure with an irregular free surface被引量：1
《Earth and Planetary Physics》2018年第3期220-230,共11页XinYan Zhang ZhiMing Bai Tao Xu Rui Gao QiuSheng Li Jue Hou José Badal 
financial support for this work contributed by the National Key Research and Development Program of China(grant nos.2016YFC0600302,2016YFC0600101 and 2016YFC0600201);the National Natural Science Foundation of China(grants 41604075,41430213,41574092 and 41474068)
Irregular surface flattening,which is based on a boundary conforming grid and the transformation between curvilinear and Cartesian coordinate systems,is a mathematical method that can elegantly handle irregular surfac...
关键词：IRREGULAR surface FLATTENING boundary conforming grid MULTISTAGE scheme TRAVELTIME TOMOGRAPHY 
Finite difference calculation of traveltime on non-orthogonal grid
《Earthquake Science》2018年第2期55-61,共7页Xiangfang Zeng Sidao Ni 
supported in part by National Basic Research Program of China (No. 2014CB845900);Hubei Provincial Natural Science Foundation of China (No. 2014CFA005)
Finite difference methods have been widely employed in solving the eikonal equation so as to calculate traveltime of seismic phase. Most previous studies used regular orthogonal grid. However, much denser grid is requ...
关键词：finite difference TRAVELTIME non-orthogonal grid TOPOGRAPHY 
A Study on the Early Warning Time of Strong Earthquakes in Taiwan
《Earthquake Research in China》2017年第1期125-135,共11页Chen Huifang Kang Lanchi Jin Xing Shao Pingrong Cao Yi 
funded by the Spark Program of Earthquake Sciences (XH13012);China Earthquake Administration,and a Key Scientific and Technological Program of Earthquake Administration of Fujian Province (201202)
The paper collects the records by the Fujian Digital Seismic Network of 40 shallow earthquakes in Taiwan with M_S≥5.0 from 1999 to 2013,analyzes the seismic phase(Pn,Sn phase)characteristics and travel-time rules,det...
关键词：Strong earthquakes of Taiwan Characteristics of seismic phases Traveltime rule Early warning time 
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