Oxford Instruments Industrial Analysis is now part of Hitachi High-Technologies Group.

NMR core analyser GeoSpec+GeoSpec is the industry standard NMR core analyser, with installations in almost every major oil producer and SCAL laboratory world-wide.

Our partnership with Green Imaging Technologies guarantees complete hardware and software integration which makes it possible for any core analysis laboratory to obtain comprehensive NMR core analysis results without the need for an in-house NMR expert.

The GeoSpec range currently comprises instrument models operating at 2, 12 and 20MHz.

2MHz models are the industry standard for routine measurements of relaxation distributions, leading to prediction of basic petrophysical parameters such as porosity, free and bound fluid determinations and T2 cutoff. These instruments operate at 2MHz to reduce artefacts caused by ferromagnetic material in the samples and to mimic the operation of the NMR logging tools.

All 2MHz GeoSpec models are equipped with Q-Sense, our ground-breaking technology for improved signal-to-noise and ultra-short echo times. Both these features are essential for accurate measurements on tight rocks and shales.

2MHz GeoSpec models are available in three different magnet sizes to accommodate cores from 1/2” to 6” diameter.

Higher field (12 and 20MHz) GeoSpec models are available for situations where higher sensitivity is required (for example, very low porosity samples), and for special applications such as Magnetic Resonance Imaging (MRI). Maximum sample size is smaller than for the 2MHz models, with the 12MHz model able to accommodate samples up to 53mm (2”) diameter and the 20MHz model up to 26mm (1”).

New applications notes

Core Analysis Measurements

Research Applications

With the addition of extra hardware and software options, the GeoSpec range is also capable of more advanced research applications,
By adding an accessory called Pulsed Field Gradients (pfg) to the NMR instrument, it becomes possible to carry out measurements dependent on the diffusion, flow, or distribution of the fluids within the core sample. This allows us to conduct measurements to investigate, for example, fluid typing and fluid distribution.

Patented software allows 2-dimensional data maps to be constructed to help with fluid typing, and other patented software generates spatially-dependent T2 distributions from “slices” along the core length. It is also possible to carry our capillary pressure measurements in about a quarter of the time taken by the traditional centrifuge capillary pressure measurement, and with many more points on the capillary pressure curve.

For more detail on these additional applications, please see:

Overburden Studies Using the P5 Cell

Nuclear Magnetic Resonance (NMR) is a valuable tool for both routine core analysis and SCAL. Most measurements are made at ambient temperature and pressure, but it is becoming increasingly important to carry out measurements at as close to reservoir conditions as possible.

The P5 Cell, unique to the GeoSpec range of NMR rock core analysers and available for 2 and 12MHz models, allows users to do this. Designed and built with a focus on usability and performance, the cell allows users to pressurize samples with up to 5,000 psi of confining pressure, at up to 100ºC.

NMR Core Analysis - P5 Overburden Cell Brochure

The P5 Cell allows samples to be pressurised both inside and outside the instrument, avoiding issues with depressurising.


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