Patent Document ID: 10067264
Application ID: 14895960
Patent Flag: 1

Claim One:
1. A method of performing a geometric inversion of seismic data comprising the steps of: obtaining petrophysical data relating to valid geological and/or dynamical scenarios within a subsurface volume comprising a hydrocarbon reservoir or region thereof, wherein valid geological and/or dynamical scenarios comprise those which are petrophysically possible; converting said petrophysical data into valid combinations of elastic parameters; projecting said valid combinations of elastic parameters onto a spherical plot; determining a penalty term from the distances between each cell of the spherical plot and the nearest valid combination of elastic parameters; performing an inversion which inverts for changes in dynamic properties of the hydrocarbon reservoir by minimizing a cost function associated with seismic mismatch between two or more seismic surveys and at least a synthetic dataset computed from said elastic parameters; wherein said penalty term is used to constrain said inversion; and using the result of said inversion in predicting performance of said hydrocarbon reservoir.