AN IMPROVED PROCESS FOR CHARACTERISING THE EVOLUTION OF AN OIL OR GAS RESERVOIR OVER TIME

摘要

Disclosed is a process for characterising the evolution of a reservoir over a time lapse comprising the steps of: providing a base and a plurality of monitor surveys of the reservoir, each having a set of seismic traces at different times; deriving an optimal regularisation weight-map from a combination of at least three surveys; and using the optimal regularisation weights to invert and obtain an improved time lapse seismic image between pairs of seismic surveys.