Crosshole seismic tomography with cross-firing geometry
Crosshole seismic tomography with cross-firing geometry
复制标题
具有交叉发射几何结构的跨孔地震层析成像
DOI:
10.1190/geo2015-0677.1
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发表时间:
2016-05
期刊:
影响因子:
3.3
通讯作者:
Wang JM
中科院分区:
文献类型:
--
作者:
Rao Ying;Wang Yanghua;Chen SM;Wang JM
ABSTRACTWe have developed a case study of crosshole seismic tomography with a cross-firing geometry in which seismic sources were placed in two vertical boreholes alternatingly and receiver arrays were placed in another vertical borehole. There are two crosshole seismic data sets in a conventional sense. These two data sets are used jointly in seismic tomography. Because the local sediment is dominated by periodic, flat, thin layers, there is seismic anisotropy with different velocities in the vertical and horizontal directions. The vertical transverse isotropy anisotropic effect is taken into account in inversion processing, which consists of three stages in sequence. First, isotropic traveltime tomography is used for estimating the maximum horizontal velocity. Then, anisotropic traveltime tomography is used to invert for the anisotropic parameter, which is the normalized difference between the maximum horizontal velocity and the maximum vertical velocity. Finally, anisotropic waveform tomography is impl...
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