Green Imaging Technologies - NMR Solutions for Core Analysis

Relative permeability is one of the most important petrophysical parameters assessed in special core analysis. Traditionally, relative permeability is measurement via one of two methods: steady state and unsteady state. In both measurements, relative permeability is calculated from measurements of fluid saturations, pressure differences and fluid flow rates. NMR can be used to determine relative permeability through measuring… [Continue Reading]
For the profitable development of shale reservoirs, it is critical to understand the natural fractures in the rock and how they may or may not interact with hydraulic fracturing. When performing core analysis, it is also important to assess whether the measured properties have been altered by fractures induced during coring. NMR is an important… [Continue Reading]
A lot can be learned about the wettability of your reservoir through NMR. The Green Imaging Technologies team has developed an NMR Wettability Index. The following provides some simple information to help understand wettability. Here is an example of a “standard” NMR T2 distribution that you might get from a typical laboratory well log calibration measurement. The… [Continue Reading]
The 12 MHz GeoSpec instrument has improved sensitivity over the standard 2 MHz systems. The improvement is about 10 times higher while not being high enough to give significant magnetic susceptibility artefacts, particularly with shale samples. This means that comparable signal to noise ratio (SNR) measurements can be made in about one hundredth of the… [Continue Reading]

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