Method for facilitating monitoring, in the course of time, of the evolution of an underground zone by compared analysis of various seismic record sets

摘要

The present invention relates to a method for facilitating monitoring, in the course of time, of the evolution of an underground zone by compared analysis of a certain number n of seismic record sets obtained respectively after n successive 3D seismic surveys (method referred to as 4D seismic method). The method comprises using a pattern recognition technique applied to all of the seismic events of the n surveys considered and analyzed simultaneously, which allows showing the evolution of the seismic events in the subsoil. The invention has an application for monitoring of changes occurring in a reservoir zone of the subsoil during production for example.