Method for characterising a plume of CO2 in a geological storage aquifer

摘要

The method involves constructing a density variation cube and an incompressibility module variation cube from seismic impedance cubes in P and S waves before and after carbon-di-oxide injection, where the variation cubes discretize an underground area in a set of cells. The plume of the free carbon-di-oxide in the area is localized by identifying the cells in which the density variation and the incompressibility module variation are negative and an absolute value is higher than a given positive threshold, where the identified cells defines the plume of the free carbon-di-oxide.