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YOUR NMR EXPERTS: Get More From Your Core

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H2 Laboratories

Your NMR Specialists

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    • Well Log Calibration
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    • NMR Cuttings Measurement
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Capillary Pressure (Pc)

Our patented GIT-CAP capillary pressure measurement has been proven to be as accurate as porous plate and 5 times faster than traditional centrifuge capillary pressure measurements.

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.

Our GIT-CAP technique uses capillary pressure theory combined with NMR-determined saturation profiles, allowing for the accurate development of data rich Pc curves quickly and accurately.  

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 Pc.  The fluid distribution is quantified using NMR.

Saturation profiles acquired after centrifugation at different speeds can be plotted on the same curve expanding the range and resolution of the Pc curve.  This technique was proven to work on a wide range of samples.

Capillary pressure measurements using the GIT-CAP method are substantially faster than those made by traditional techniques, particularly  for low permeability samples with longer equilibrium times.  They also provide significantly  more data points, allowing more accurate prediction of additional parameters such as pore throat distributions, wettability, and relative permeability.

Click here to download the App Note, or visit our Publications page to read a paper.

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