Method of obtaining a model representative of a heterogeneous me

Details Method of obtaining a model representative of a heterogeneous me Method of obtaining a model representative of a heterogeneous me

1989-08-07

1990-11-20

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 38, G01V 130

Patent

active

049723839

ABSTRACT:
A method for providing an optimum model having at least two dimensions of a heterogeneous medium, representing the variations of at least one physical parameter, for example the acoustic impedance of underground formations, and satisfying as well as possible the data measured in situ, for example well-logging in wells in studying the sub-soil as well as other data relative to the medium studied, for example geological information and seismic surface recordings. The method includes the construction of a reference model and the definition of covariance operators which model the uncertainties not only in the medium studied but also in the recordings obtained from outside the medium, for example seismic sections. Comparison between the effective recordings and others which are formed on the basis of the constructed model, makes it possible to check the validity thereof. The resolution method chosen results in coupling together different information used and separating the coherent parts (the signals) from the incoherent parts (the noise).

REFERENCES:
patent: 4679174 (1987-07-01), Gelfand
patent: 4817062 (1989-03-01), De Buyl et al.
Oldenburg, D. A. et al., "Inversion of Band Limited Reflection Seismograms: Theory and Practice," Proc. IEEE, vol. 74, #3, Mar. '86.
Bamberger, A. et al., "Inversion of Normal Incidence Seismograms," Geophysics, vol. 47, #5, May '82.
Lavergue, M. et al., "Inversion of Seismograms and Pseudo Velocity Logs," Geophysical Prospecting, vol. 25, 1977.
Western Geophysical Brochure, SLIM, 1983.

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