The USBM method developed by Donaldson et al.<ref name=pt05r47 /> uses the same types of data, but considers the work required to do the forced displacement. This requires calculating the area under the [[capillary pressure]] curve obtained during the forced displacement. Generally, the capillary pressure displacement is done by centrifuging, but other capillary displacement techniques can be used. | The USBM method developed by Donaldson et al.<ref name=pt05r47 /> uses the same types of data, but considers the work required to do the forced displacement. This requires calculating the area under the [[capillary pressure]] curve obtained during the forced displacement. Generally, the capillary pressure displacement is done by centrifuging, but other capillary displacement techniques can be used. |