S3D-INV

S3D-INV is capable of performing two-phase production data inversion and interwell tracer test data inversion. For both of the cases, the estimable parameters are either absolute permeability or porosity. For the special case of tracer inversion, estimation of residual oil saturation is possible with the use of partitioning tracer test data.

S3D-INV is based on streamline-derived sensitivities and on iterative linearized minization scheme. It can account for gravity and changing streamlines.