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.
