METHODS OF DETERMINING FRONT PROPAGATION WITHIN A SUBSURFACE VOLUME

摘要

Disclosed is a method of determining front propagation within a subsurface volume such as a reservoir. The subsurface comprises a plurality of cells and at least one geological fault (210). The method comprises performing a fast marching algorithm so as to determine said front propagation in terms of the time of arrival of the front at a particular cell from one or more neighbouring cells which make up the neighbourhood of said particular cell. For each faulted cell (C) that is adjacent a geological fault, the neighbourhood of the faulted cell is defined as comprising only its geometric neighbours (NS, NG cells and NG cells) where the geometric neighbours are those cells that are in contact with the faulted cell in a geometric sense, regardless of stratification.

主权项

1. A method of determining front propagation within a subsurface volume, said subsurface volume being discretised into a plurality of cells and comprising at least one geological fault, said method comprising:
performing a fast marching algorithm so as to determine said front propagation in terms of the time of arrival of the front at a particular cell from at least one neighbouring cells which make up a neighbourhood of said particular cell; and wherein, for each faulted cell that is adjacent a geological fault, the neighbourhood of said faulted cell is defined as comprising only its geometric neighbours, said geometric neighbours being those cells that are geometrically in contact with the faulted cell, regardless of stratification of the subsurface volume.