Annual Report 2000 - WIT
Annual Report 2000 - WIT Annual Report 2000 - WIT
ii Saenger E. and Shapiro S., Effective velocities in fractured media: Intersecting and parallel cracks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 Goertz A. and Kaselow A., A High-Frequency Seismic Experiment to Measure Seismic Signatures of Fluid Flow In-situ . . . . . . . . . . . . . . . . . . . . . . . . . . . 191 Modeling Vanelle C. and Gajewski D., Second-order interpolation of traveltimes . . . . . . . . . 203 Vanelle C. and Gajewski D., True-amplitude migration weights from traveltimes 215 Coman R. and Gajewski D., Hybrid Method for Traveltime Computation in a Complex 3D Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227 Soukina S. and Gajewski D., An FD eikonal solver for 3-D anisotropic media . . . 239 Buske S., First arrival traveltimes and amplitudes by FD solution of eikonal and transport equation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249 Other Topics Leite L. W. B., Rocha M. P. C. d., and Alves F. J., Attenuation of Primary Multiples and Peg-legs: Comparison of WHL and KBC Methods. . . . . . . . . . . . . . 263 Appendix WIT Working Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277 List of WIT Sponsors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283 Research personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
Wave Inversion Technology, Report No. 4, pages 1-7 Reviews: WIT Report 2000 Responsible for compilation and layout: A. Mueller & M. Spinner 1 Imaging The Common-Reflection-Surface (CRS) stack as presented in the preceeding WIT reports assigns only one parameter set to each ZO sample to be simulated. Mann and Gerst now present an extended CRS stack strategy that is able to detect and characterize an arbitrary number of contributing events for each ZO sample. Thus, conflicting dip situations can be resolved to simulate the interference of intersecting events and to characterize the contributing events separately. Koglin and Vieth present a 2-D velocity model that is exclusively data-driven. The common-reflection-surface stack attributes are used for the inversion. These are smoothed with a sophisticated algorithm to obtain a robust inversion. Chira-Oliva and Hubral provide an analytic 2D CRS stacking formula for a curved measurement surface. A new analytic expression for the NMO-velocity has been found. Garabito et al. present a new optimization strategy for determining the CRS parameters and simulating zero-offset section based on the CRS stack formalism. This is a three step in cascade process: 1) Two-parameters global optimization; 2) Oneparameter global optimization; and 3) three-parameters local optimization. Schleicher et al. investigate the asymptotic inverse Kirchhoff-Helmholtz integral under more realistic conditions and compare the results of this 'migration by demodeling' integral to those of conventional true-amplitude Krichhoff migration. Schleicher and Santos study the resolving power of seismic migration as a function of source-receiver offset. In a simple numerical example, they compare the achieved resolution with the ray-theoretical prediction. They find that the region of influence after migration is well described by the difference between the time-domain Fresnel zone and its paraxial approximation. Hertweck et al. present a seismic imaging tool which is based on the unified approach theory. With the help of Kirchhoff-type true-amplitude migration and demigration, 1 email: amuel@gpi.uni-karlsruhe.de & mspin@gpi.uni-karlsruhe.de 1
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- Page 30 and 31: 18 REFERENCES Höcht, G., de Bazela
- Page 32 and 33: 20 INVERSION BY MEANS OF CRS ATTRIB
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- Page 51 and 52: 39 strategy by combining global and
- Page 53 and 54: 41 elled data is presented in Figur
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ii<br />
Saenger E. and Shapiro S., Effective velocities in fractured media: Intersecting<br />
and parallel cracks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183<br />
Goertz A. and Kaselow A., A High-Frequency Seismic Experiment to Measure<br />
Seismic Signatures of Fluid Flow In-situ . . . . . . . . . . . . . . . . . . . . . . . . . . . 191<br />
Modeling<br />
Vanelle C. and Gajewski D., Second-order interpolation of traveltimes . . . . . . . . . 203<br />
Vanelle C. and Gajewski D., True-amplitude migration weights from traveltimes 215<br />
Coman R. and Gajewski D., Hybrid Method for Traveltime Computation in a<br />
Complex 3D Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227<br />
Soukina S. and Gajewski D., An FD eikonal solver for 3-D anisotropic media . . . 239<br />
Buske S.,<br />
First arrival traveltimes and amplitudes by FD solution of eikonal and<br />
transport equation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249<br />
Other Topics<br />
Leite L. W. B., Rocha M. P. C. d., and Alves F. J., Attenuation of Primary Multiples<br />
and Peg-legs: Comparison of WHL and KBC Methods. . . . . . . . . . . . . . 263<br />
Appendix<br />
<strong>WIT</strong> Working Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277<br />
List of <strong>WIT</strong> Sponsors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283<br />
Research personnel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
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