Capillary pressure is a critical parameter for the oil exploration and production industry, and is a common measurement performed in core analysis laboratories. However, traditional techniques such as porous plate, centrifugation and mercury injection are laborious, time consuming and expensive.

The patented GIT-CAP capillary pressure measurement technique uses capillary pressure theory combined with NMR-determined saturation profiles, allowing for the accurate development of capillary pressure curves. With this technique, the core plug is first fully saturated with brine, and is then centrifuged to create a distribution of fluid in the plug which is in turn dependent on capillary pressure.