FREMGANGSMAATE FOR OPPNAAELSE AV EN MODELL SOM ER REPRESENTATIV FOR ET HETEROGENT MILJOE, SAERLIG UNDERGRUNNSMILJOE.

摘要

Method for constructing an optimum model to at least two dimensions of a heterogeneous medium, representing the variations of at least one physical parameter (the acoustic impedance of the underground formations, for example) and satisfactory to the data measured in situ (logs in wells in the case of the under - ground) as well as other data relating to the studied medium (geologic information and seismic recordings of the surface). / p & & p & the method comprises the construction of a reference model and the definition of covariance operators, which model the uncertainties on the studied medium that the recordings obtained from the outside of the medium (seismic sections, for example.). A comparison between the recordings effective and other that it is based on the model constructed, makes it possible to check the validity of that - ci. The resolution method chosen has for effect to couple together the different information used and to separate the coherent parts (the signals) of the parts (the incoherent noise). / p & & p & application in particular to the construction of a lithologic model of the ground under -