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Industry Article: Imaging Complex Geology Through Challenging Surface Terrain—a Case Study from West China

Imaging Complex Geology Through Challenging Surface Terrain—a Case Study from West China
Publication: First Break
Publication Date: 03/01/2015

This article describes reprocessing and structural imaging of land seismic data from an area where both the subsurface geology and surface conditions are extremely complex. Tomographic static correction using carefully picked first breaks outperformed previous field static solutions based on upholes. A multi-domain noise attenuation sequence included a newly developed method that uses true shot and receiver coordinates, thereby handling irregularities in acquisition geometry. A tilted transverse isotropic velocity model was built using a combination of diving wave tomography; geologically constrained reflection tomography; and multi-azimuthal tomography in the offset vector tile domain. A seismic joint inversion model building technique was applied in part of the area. The new workflow delivered improved continuity, S/N, interpretability and compatibility with well and non-seismic data throughout the dataset.




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