Traveltime computation and imaging from rugged topography in 3D TTI media
Traveltime computation and imaging from rugged topography in 3D TTI media
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3D TTI 介质中崎岖地形的走时计算和成像
DOI：
10.1088/1742-2132/11/1/015003
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发表时间：
2013-06
影响因子：
1.4
通讯作者：
Fang Wubao
中科院分区：
文献类型：
--
作者：
Liu Shaoyong;Wang Huazhong;Yang Qinyong;Fang Wubao
Foothill areas with rugged topography are of great potential for oil and gas seismic exploration, but subsurface imaging in these areas is very challenging. Seismic acquisition with larger offset and wider azimuth is necessary for seismic imaging in complex areas. However, the scale anisotropy in this case must be taken into account. To generalize the pre-stack depth migration (PSDM) to 3D transversely isotropic media with vertical symmetry axes (VTI) and tilted symmetry axes (TTI) from rugged topography, a new dynamic programming approach for the first-arrival traveltime computation method is proposed. The first-arrival time on every uniform mesh point is calculated based on Fermat's principle with simple calculus techniques and a systematic mapping scheme. In order to calculate the minimum traveltime, a set of nonlinear equations is solved on each mesh point, where the group velocity is determined by the group angle. Based on the new first-arrival time calculation method, the corresponding PSDM and migration velocity analysis workflow for 3D anisotropic media from rugged surface is developed. Numerical tests demonstrate that the proposed traveltime calculation method is effective in both VTI and TTI media. The migration results for 3D field data show that it is necessary to choose a smooth datum to remove the high wavenumber move-out components for PSDM with rugged topography and take anisotropy into account to achieve better images.
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影响因子：
3.3
作者：
Jianguo Sun;Zhangqing Sun;Fuxing Han
通讯作者：
Jianguo Sun;Zhangqing Sun;Fuxing Han
DOI：
10.1190/1.1851190
发表时间：
2004
期刊：
Seg Technical Program Expanded Abstracts
影响因子：
--
作者：
T. Alkhalifah;C. Bagaini
通讯作者：
T. Alkhalifah;C. Bagaini
影响因子：
3.3
作者：
B. S. Byun;D. Corrigan;J. Gaiser
通讯作者：
B. S. Byun;D. Corrigan;J. Gaiser
影响因子：
3.3
作者：
I. Tsvankin
通讯作者：
I. Tsvankin
影响因子：
3.3
作者：
J. Qian;W. Symes
通讯作者：
J. Qian;W. Symes