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国家自然科学基金(40874041): 作品数：2 被引量：33H指数：2; 相关作者：张智兰海强白志明徐涛梁锴更多>>; 相关机构：桂林理工大学中国科学院中国科学院研究生院更多>>; 发文基金：国家自然科学基金更多>>; 相关领域：天文地球更多>>

Short Note Segmentally Iterative Ray Tracing in Complex 2D and 3D Heterogeneous Block Models: We describe a complex geologic model as an aggregate of arbitrarily shaped blocks separated by cubic splines i...; Ergen Gao; 文献传递

地震波走时场模拟的快速推进法和快速扫描法比较研究: 地震波走时信息在叠前偏移、叠前速度分析、地震层析成像、走时反演及地震定位等中部有重要应用.快速推进法因其理论完善、精确灵活,无条件稳定,近年来已在走时计算领域得到广泛应用.快速扫描法作为求解一阶非线性双曲型偏微分方程的高...; 兰海强张智徐涛白志明梁锴; 关键词：地震波走时有限差分程函方程; 文献传递

贴体网格各向异性对坐标变换法求解起伏地表下地震初至波走时的影响被引量：19: 2012年; 笛卡尔坐标系中的经典程函方程在静校正、叠前偏移、走时反演、地震定位、层析成像等很多地球物理工作中都有应用,然而用其计算起伏地表的地震波走时却比较困难.本文通过把曲线坐标系中的矩形网格映射到笛卡尔坐标系的贴体网格,推导出曲线坐标中的程函方程,而后,用Lax-Friedrichs快速扫描算法求解曲线坐标系的程函方程.研究表明本文方法能有效处理地表起伏的情况,得到准确稳定的计算结果.由于地表起伏,导致与之拟合的贴体网格在空间上的展布呈各向异性,且这种各向异性的强弱对坐标变换法求解地震初至波的走时具有重要影响.本文研究表明,随着贴体网格的各向异性增强,用坐标变换法求解地表起伏区域的走时计算误差增大,且计算效率降低,这在实际应用具有指导意义.; 兰海强张智徐涛白志明; 关键词：程函方程地震波走时起伏地表各向异性

Seismic wavefield modeling in media with fluid-filled fractures and surface topography: We present a finite difference(FD) method for the simulation of seismic wave fields in fractured medium with a...; Lan Hai-QiangZhang Zhong-Jie; 关键词：MODELING FRACTURE; 文献传递

起伏地表下地震波初至走时计算: ＜正＞1.引言在我国随着东部平原地带大规模油气勘探工作已接近尾声,目前的油气勘探重点已转移到了西部、西南部地区。与东部地区不同,西部地区剧烈的地形起伏给地震勘探工作提出了严峻的挑战,传统的基于平缓构造勘探的地震数据采集、...; 兰海强张忠杰

地震波走时场模拟的快速扫描法: ＜正＞1.引言地震波初至走时广泛地应用于叠前偏移、叠前速度分析、地震层析成像、走时反演及地震定位等。随着地震观测技术的快速发展、探测系统的不断完备、探测的范围也不断扩大且大幅地向纵深方向发展,有时甚至要对一个大区域进行高...; 兰海强张忠杰; 文献传递

Comparative study of the free-surface boundary condition in two-dimensional finite-difference elastic wave field simulation: The finite-difference(FD) method is a powerful tool in seismic wave field modelling for understanding seismic ...; Haiqiang Lan and Zhongjie Zhang State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,People’s Republic of China; 关键词：ACCURACY; 文献传递

Seismic structure and rheology of the crust under China's mainland: The crust and upper mantle in China’s mainland were relatively densely probed with wide-angle seismic profilin...; Zhongjie ZhangYangfan DengLin ChenJing WuJiwen TengGiuliano Panza

Three-Dimensional Wave-Field Simulation in Heterogeneous Transversely Isotropic Medium with Irregular Free Surface: Modeling of seismic-wave propagation in anisotropic medium with irregular topography is beneficial to interpre...; Haiqiang Lan and Zhongjie Zhang State Key Laboratory of Lithosphere Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing,100029,PR China; 文献传递

Topography-dependent eikonal equation and its solver for calculating first-arrival traveltimes with an irregular surface: First-arrival traveltime is commonly used in problems that involve static correction,prestack migration,earthq...; Haiqiang LanZhongjie Zhang; 文献传递

国家自然科学基金(40874041)