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GeoSpec

GeoSpec is the industry standard NMR rock core analyser, with installations in almost every major oil producer and SCAL laboratory world-wide. Three models are available operating at 2, 12 and 20MHz. The GeoSpec 2MHz models are the industry standard for routine measurements of relaxation distributions, allowing the 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. 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).

The GeoSpec range of instruments is the result of a successful long-term collaboration between Oxford Instruments and Green Imaging Technologies (GIT), the world leaders in hardware and software for NMR core analysis.

  • GeoSpec - industry standard NMR core analyser, used by 90% of NMR core analysts
  • Range of probe sizes - choose the optimum probe for your sample size to maximise SNR and minimise measuring time
  • Q-Sense probe technology - for short echo times to see small pores in tight rocks and shales, while preserving high signal to noise ratios (SNR) for short measuring times
  • Green Imaging Technologies software

  • P5 cell - for measurements at as close to reservoir conditions as possible


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The GeoSpec includes instruments from 2MHz to 23MHz operating frequency, handling samples from ½ to 6 inches diameter, with integrated software and accessories to suit all users from routine core analysis to advanced petrophysics research.

All GeoSpec rock core analysers come complete with LithoMetrix software, which acts as the user interface and performs all instrument management and basic core analysis functions. LithoMetrix can be upgraded to GIT Systems to add more advanced measurements such as 2D maps, diffusion studies, capillary pressure and saturation profiles. Users of GeoSpec instruments equipped with 3D gradients can maximise the performance of the instrument using the GIT Systems 3D Imaging software.

Made by Oxford Instruments - Industry standard NMR core analyser, used by 90% of NMR core analysts

2MHz operating frequency - Make measurements at industry-standard frequency, compatible with downhole NMR tools

P5 overburden cell - Make measurements at high pressure and temperature

Q-Sense probe technology - Get short echo times to see small pores in tight rocks and shales, while preserving high signal to noise ratios (SNR) for short measuring times

Range of probe sizes - Users can choose the optimum probe for their sample size, to maximise SNR and minimise measuring time

Dedicated applications software - Get common petrophysical parameters through a user-friendly interface, without the need for an NMR expert

Pulsed field gradients options - Allows advanced measurements such as capillary pressure, saturation profiles and 2D data analysis for fluid typing

Options

ModelOperating frequencyMaximum sample diameterGradientsSoftware
GeoSpec 12/53 1D12MHz53mm1-DLithoMetrix
GeoSpec 12/53 1D GIT ADV12MHz53mm1-DGIT Advanced
GeoSpec 12/53 1D GIT IMG12MHz53mm3-DGIT Advanced Imaging
GeoSpec 12/53 BASIC12MHz53mmno gradientsLithoMetrix
GeoSpec 2/100 AdV2MHz100mm1-DGIT Advanced
GeoSpec 2/100 BASIC2MHz100mmno gradientsLithoMetrix
GeoSpec 2/53 Adv2MHz53mm1-DGIT Advanced
GeoSpec 2/53 BASIC2MHz53mmno gradientsLithoMetrix
GeoSpec 2/75 ADV2MHz75mm1-DGIT Advanced
GeoSpec 2/75 BASIC2MHz75mmno gradientsLithoMetrix

Upgrades/Accessories

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.

Related Applications

Rock Core Analysis