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Summary Converted wave velocity analysis is generally performed after CRP (Common Reflection Point) data sorting. Unfortunately, CRP is time and offset dependent and cannot be estimated unless at least an a-priori assumption on the ratio is at-least available. To overcome this problem, the angle and velocity sensitivity of the CS (Common Shot) moveout curve is explored. The analysis is based on the analytical solution of the moveout equation for P-SV waves reflected by a dip interface within a homogeneous medium. The application of the analytical solution for homogeneous medium is then extended to layered models, and this shows that the accuracy is preserved provided that offset dependent RMS Vp and Vs velocities are estimated along the straight ray approximations of the actual wave travelpaths.
- Geophysics > Seismic Surveying > Seismic Processing (1.00)
- Geophysics > Seismic Surveying > Seismic Modeling > Velocity Modeling (1.00)
The shot records without multiples can be combined in one matrix method works for both marine and land data (as shown by In it has been shown that using this matrix .
- Europe > Netherlands (0.29)
- Asia > Middle East (0.29)
In accordance with sonic-log data, An integrated multi-disciplinary method has been we can use the proposed algorithm to establish a procedure presented for the seismic broad-band constrained inversion.
- Geophysics > Seismic Surveying > Seismic Processing (0.87)
- Geophysics > Seismic Surveying > Seismic Interpretation (0.53)
- Geophysics > Seismic Surveying > Seismic Modeling > Velocity Modeling (0.32)
Estimation of velocity-depth models for used to refine the model in the subsalt region. I shall present structural and stratigraphic targets from different exploration examples of earth models estimated in depth from inversion basins generally require different procedures which consist of of seismic data originating from various exploration basins.
Seismic wave traveltimes and amplitudes are essential in 3-D pre-stack Kirchhoff based subsurface imaging. We present an algorithm for constructing wavefronts which can be used to obtain multivalued traveltimes and amplitudes in a 3-D subsurface model.
Summary A method for computing traveltimes for a complex velocity model is presented. The method is based on Fermat's principle and is used to perform 3-D prestack migration. Results from 3-D prestack depth migration obtained using this algorithm are presented. Improved image quality is demonstrated in comparison with 3-D poststack depth migration. Introduction The development of fast algorithms for computing traveltimes in an arbitrary complex 2-D/3-D medium has recently become particularly important. These algorithms are especially interesting in the context of performing fast prestack depth migration in two and in three dimensions.
Figure 1 show comparisons between vertical A knowledge of the background velocity model is crucial wavenumber predicted by the equation (1) and that in achieving accurate reservoir description now computed using the exact eigenvalue-eigenvector system.
- Geophysics > Seismic Surveying > Seismic Processing (1.00)
- Geophysics > Seismic Surveying > Seismic Modeling > Velocity Modeling (1.00)
- North America > United States > South Dakota > Williston Basin > Bakken Shale Formation (0.99)
- North America > United States > North Dakota > Williston Basin > Bakken Shale Formation (0.99)
- North America > United States > Montana > Williston Basin > Bakken Shale Formation (0.99)
Multiscale edge detection Edge detection is developed in image analysis and pattern A multiscale edge detection procedure is described which completely recognition disciplines [3]. In the seismic context the edge characterizes the rapid changes in the medium parameters detection techniques recently got a lot of attention due to by extracting their location and their strength at a range of the so-called coherence cube analysis [11.
It should be clear that there must be a tradeoff between the goodness of fit and the number of attributes employed to achieve it. A statistical procedure is presented onhowtocalibrate seismic attributes The functional form of the regression formula (specifically, the with physical properties derived from well control.
The key points in the processing flow will be illustrated using real data examples from a complex Exploration programs are being driven into areas of thrust belt environment.
- Geophysics > Seismic Surveying > Seismic Processing (1.00)
- Geophysics > Seismic Surveying > Seismic Modeling > Velocity Modeling (0.48)