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THE EXAMPLE OF CONSTRUCTION AND REFINEMENT OF VELOCITY-DEPTH MODEL USING MIGRATION AND TOMOGRAPHIC TRANSFORMATIONS

A. S. Yunasheva, B. N. Nedomovnyy, E. V. Mosyagin, M. N. Shaporina

Siberian Research Institute of Geology, Geophysics and Mineral Resources, Novosibirsk, Russia

The article is devoted to the overview of the main methods for constructing velocity-depth models (VDM), applied today and the effectiveness of their use in complicated seismic and geological conditions. In the present work, the method of integrated approach is considered along with well-known and generally accepted algorithms. The method of integrated approach is based on a combination of two model-building techniques for the VDM. The concerned approach allows researchers to combine positive aspects of combined methods while leveling their disadvantages. Using the example of real modern data obtained on the territory of East Siberia near fold-thrust dislocations of the Cis-Patom regional trough, the possibility of improving the quality of seismic image is demonstrated due to the use of the integrated approach and tomographic transformations for complexly constructed environments in the process of deep migration.

Keywords: East Siberia, complexly constructed environments, velocity-deep model, integrated approach, grid-based tomography, quantitative control of quality, interpretation of results.

DOI 10.20403/2078-0575-2021-2-74-83

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