Inversion: A tool to tie near-surface static corrections
Inversion: A tool to tie near-surface static corrections
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DOI：
10.1190/segam2013-0003.1
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
R. Bridle;A. Al-Saad
中科院分区：
文献类型：
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作者：
R. Bridle;A. Al-Saad
二维线的多层近地表模型可以通过井上控制构建。由于上孔对近地表的采样稀疏，静态解中可能仍存在时间异常。这些异常现象可以通过残余静力学的额外偏移来解决，或者用折射或断层扫描方法计算出的静力学进行替换。这些静态变化被反转回多层模型以提供修正的模型。此修订后的模型形成了新的二维框架网格，用于附加二维地震线。如果存在使用不同静力学解决方案方法建模的 3D 测量，则该框架为 3D 测量的静力学解决方案的协同克里金法提供主要控制。
Multiple layer near-surface models for 2D lines can be constructed from uphole control. Time anomalies may still be present in the static solution due to the sparse sampling of the near-surface by the upholes. The anomalies are solved by additional shifts from residual statics, or replacement by statics calculated from refraction or tomography methods. These static shifts are inverted back to the multiple layer model to provide a revised model. This revised model forms a new 2D framework grid for additional 2D seismic lines. Where there are 3D surveys modeled with different methods of statics solutions, the framework provides primary control for cokriging of the statics solution from 3D surveys.