The stable wave-field propagators of one-way wave equation for Born and Rytov approximations are derived by using the local Born and local Rytov approximation methods in the scatter theory of wave-field propagation, and their application effects in prestack depth migration imaging of wave equation are compared theoretically and practically.
The accuracy of migration image of ground-penetrating radar data is strongly related to the accuracy of permittivity distribution determined from multi-offset data.
The object of crossborehole seismic observation is to ascertain the lateral variation of crossborehole medium by doing both the crossborehole velocity image and crossborehole migration image, so as to serve reservoir engineering and reservoir description.
Different observation systems cause different influences on tomographic inversion or migration image because of the unique observation that puts source in a borehole and receivers in others.
but the analysis of double fo cusing character is special target-oriented and regional,which emphasizes on o btaining the optimal precision of migrated imaging.
The studies of the predecessors showed that current isotropic and anisotropic migrated imaging theories are difficult in effectively eliminate the in- fluence of anisotropie faulted belts, for example, the issue of smeared imaging for faulted zone (shadow area) can he often met in prestaek depth migration processing.
In this thesis,the transientelectromagnetic responseson the surface for differentgiven modelsunder the txcitation of a grounded dipole are calculated by using the Gaver- Stehfest( G- S) method,then the authors introduce the concept of reverse- time migration,use Stratton- Chu integral formulas to migrate downward these forward modelling results being used as measured electromagnetic field,and then normalize anddifferentiate the migrated electromagnetic field,reconstruct the pseudo- seismic depth profile,realize the migration and imaging of time- domain electromagnetic field.
The development of wave-theory based seismic migration and imaging methods provides reliable ways for the construction of angle-domain CIGs of high quality.
In view of the seismic exploration problem of thin sand reservoirs in the Songliao Basin, this paper puts forward a migration imaging method using CGP (common geophone point) stacked cylindrical waves.
The results from the modeling analysis and the data processing of the TK8157 seismic line in the Songliao Basin shows that the proposed migration imaging method has higher seismic resolution and fidelity.