Method of constraining an inversion in the characterisation of the evolution of a subsurface volume
AssigneeTotal SA
InventorsPierre Daniel Thore, Jonathan Anthony Edgar
Life of this patent
Estimating the term…
Abstract
Disclosed is a method for characterizing the evolution of a subsurface volume over time. The method comprises providing a first and second surveys of the reservoir with a first and second sets of seismic traces, performing an inversion to obtain estimates of changes having occurred between said first time and said second time in terms of at least one model parameter; wherein the subsurface volume is divided into regions according to a high order discrete classification attributed in accordance with the region's geologic characteristics, and said inversion is constrained per region of subsurface volume. The regions of subsurface volume may be geological layers.
Claims18
A method for characterising the evolution of a subsurface volume over time, said method comprising:
- providing a first survey of the subsurface volume with a first set of seismic traces corresponding to a first time;
- providing a second survey of the subsurface volume with a second set of seismic traces corresponding to a second time;
- performing an inversion to obtain estimates of changes having occurred between said first time and said second time in terms of at least one model parameter;
- and
- wherein said subsurface volume is divided into regions according to a high order discrete classification attributed in accordance with the region's geologic characteristics, and said inversion is constrained per region of subsurface volume.
Dependencies are inferred from the claim text.