GIT-CAPTM












































Capillary Pressure Determination using MRI

Green Imaging Technologiesí GIT-CAP software module determines capillary pressure using magnetic resonance imaging (MRI) to directly measure the water saturation distribution following centrifugation. GIT- CAP runs under the GIT Systems software platform and performs the MRI saturation determinations automatically plotting capillary pressure versus water saturation.



Capillary pressure is directly determined using the known centrifuge force and the MRI measured water saturation. On the left is a plot of capillary pressure data using three different centrifuge speeds. The solid line is he capillary pressure curve calculated using the traditional centrifuge technique.

The graph on below shows saturation distributions in a rock core fully saturated, and after centrifugation at three different speeds. GIT's method for measuring water saturation does not require complex calibration or correction for relaxation times. It is a direct measurement.

The graph below shows water saturation distribution measured with GIT Systems as a function of time. There is no noticeable redistribution of fluids with the rock even after 1.5 days! Although water will spontaneously imbibe into rocks, water that is in the pores does not redistribute quickly within the rock.