Within the Conference "BaikalGeo’2024" we are pleased to invite you to attend the following reports:
1. Key points in the solution of signal processing problems on the example of seismic data in Eastern Siberia.
The speaker: Ovchinnikov Kirill, Leading geophysicist, Seismotech Ltd.
The authors are: Finikov Dmitry, Ovchinnikov Kirill, Shalashnikov Andrey
Seismic exploration in general, and processing in particular, in the conditions of Eastern Siberia has a number of difficulties associated with the structure of the upper part of the section, complex geological structure, depth and low thickness of the target intervals. These factors lead to the necessity to apply specialized processing graphs aimed at the correct accounting of the upper part of the section and the entire underlying formation in the DVM, construction of detailed depth images, etc.
This report considers the peculiarities of signal processing of data obtained in the conditions of Eastern Siberia:
- Minimal and zero-phase deconvolution
- Phase deconvolution
- Forming deconvolution based on well data
- Modeling and subtraction of multiple fields
- Model-based denoising
- Model-based regularization
- Benchmarking
The report covers only a few of the processing stages that the authors believe to be critical to the success of the tasks solution.
The authors demonstrate the methods of model-oriented processing, construction of the model of internal multiples and their suppression with the control of the dynamics of useful reflections with the involvement of well data.
The effect of phase spectrum correction is demonstrated. The interpretation support with the control of the results using well data was especially important for the project.
2. Analysis of parameters and сorrection of frequency-dependent absorption effects in seismic data processing.
The speaker: Anisimov Ruslan, Leading Software Developer, Seismotech Ltd.
The authors are: Anisimov Ruslan, Finikov Dmitry, Ovchinnikov Kirill, Shalashnikov Andrey
Analysis of frequency-dependent absorption effects, parameterization of these effects during processing, study of wave attenuation parameters and their interpretation have long been recognized as the most important problems of seismic exploration. A great number of articles and monographs have been devoted to these questions. However, many theoretical and applied issues remain unresolved.
The consideration of frequency-dependent absorption can be split into two stages: analysis of absorption parameters and distortion correction issues, elimination of distortions caused by absorption from seismic data.
The report briefly introduces the problem statement, discusses different types of Quality factor (Q) parameter representation, and presents algorithms for analyzing the Q-efficient (Qeff) parameter, Q-tomography, and corresponding seismic data correction.
