Transmission and reflection tomographic inversion of offset VSP-data and the use of the results for target-oriented processing of reflection seismic data
The aim of this research programme was the development of a tomography method to process, invert and evaluate traveltime and amplitude data, to explore targets such as hydrocarbon reservoirs by means of reflection seismics. This method can be used for any source-receiver geometries such as vertical seismic profiling (VSP), horizontal seismic profiling (HSP), crosshole geometries and their combinations. For the inversion, not only the first time (amplitude) onsets but also the later arrivals and amplitudes from refracted and reflected waves are used. Additionally, the derived model from the tomographic inversion for a target orientated processing based on beam focussing techniques is used in selected parts of the model. In the forward modelling phase, the Gaussian beam method was selected and its reliability and accuracy tested. In the inversion phase, iterative reconstruction techniques were studied. The forward modelling was then fitted to the iterative inversion process. Results from a synthetic reverse VSP-model were compared with the standard tomographic inversion.
Bibliographic Reference: EUR 14040 EN (1992) 120 pp., FS, ECU 13.50
ISBN: ISBN 92-826-3979-7
Record Number: 199210562 / Last updated on: 1994-12-02
Original language: en
Available languages: en