Key characteristics of rocks, reservoirs, and fluids can be analyzed using benchtop NMR. Total volume, porosity, permeability, capillary pressure, wettability, and fluid saturation can all be measured by NMR.
GeoSpec instruments enable the assessment of carbon dioxide sequestration for Carbon Capture and Storage (CCS) and enhanced oil recovery (EOR) by characterizing rock cores under core flooding conditions at high pressures. With high-pressure cells that can function at temperatures of up to 100 ºC, the GeoSpec is made to replicate the functionality of the NMR logging instruments used in downhole wells.
With installations in nearly all major oil-producing companies and SCAL laboratories worldwide, GeoSpec is the industry standard desktop NMR rock core analyzer. It can handle samples ranging in diameter from ½ to 2 inches.
Without the requirement for an NMR specialist, integrated software from Green Imaging Technologies (GIT) and a wide range of peripherals serve any application from standard rock core analysis to cutting-edge petrophysics research.
Regular measurements of relaxation distributions by the GeoSpec Core Analyser 2 MHz models enable the prediction of fundamental petrophysical parameters from T₂ data, including porosity and free and bound fluid determinations. Higher field (12 and 23 MHz) models are designed for high sensitivity applications, such as Magnetic Resonance Imaging (MRI) that take advantage of 3D gradients, and for very low porosity samples.
Image Credit: Oxford Instruments Magnetic Resonance
Industry-Standard
Selected globally by academics, service providers, and oil corporations
Image Credit: Oxford Instruments Magnetic Resonance
Unique Information
Information on fluid behavior that is not obtainable from other methods is provided by NMR core analysis.
Image Credit: Oxford Instruments Magnetic Resonance
Wide Range of Applications
Applications include porosity, fluid typing, capillary pressure, gas isotherms, and many more. Increase the amount of data obtained from the core.
Image Credit: Oxford Instruments Magnetic Resonance
Comprehensive Applications Software
Specialized software from Green Imaging Technologies that is easy to use - from basic LithoMetrix included with every GeoSpec to Advanced versions for extensive applications.
Image Credit: Oxford Instruments Magnetic Resonance
Three Models, to Suit All Needs
- 2 MHz to replicate the behavior of NMR logging instruments and lessen artifacts from ferromagnetic material in the samples.
- 12 MHz to shorten measurement times or improve sensitivity on samples with low porosity.
- For the most sensitive measurements on small samples, use a frequency of 23 MHz.
Software
LithoMetrix software from Green Imaging Technologies manages all routine measurements, while Advanced versions include optional 3D imaging along with 2D maps, diffusion tests, capillary pressure, and saturation profiles.
Q-Sense Technology
To see the smallest pores and increase the precision of porosity measurements, Q-Sense allows the use of short echo times while maintaining high signal to noise ratios.
Image Credit: Oxford Instruments Magnetic Resonance
Overburden Cells
For GeoSpec 2 and 12, the high-pressure P5 (5,000 psi, 1.5-inch cores) and P10 (10,000 psi, 1-inch cores) cells function up to 100 ºC. Allows experimentation with core flooding slightly below the maximum confining pressures.
Range of Probe Sizes
To optimize the accurate measurement of all core sizes, the diameter should range from ½ inch to 2 inches.
Project Database
Records all of the samples, related measurements, calibration information, and equipment performance.
Pulsed-Field Gradients Options
Permits sophisticated measurements for fluid typing, capillary pressure, saturation profiles, and 2D data analysis.
Options
Source: Oxford Instruments
| Model |
Operating
frequency (MHz) |
Maximum sample
diameter (mm) |
Gradients |
GIT Software
Options |
| GeoSpec LT |
23 |
29 |
None |
GIT Systems Basic (custom version) |
| GeoSpec 12 |
12 |
53 |
None |
LithoMetrix or GIT Systems Basic |
| GeoSpec 12/1D |
12 |
53 |
1D |
GIT Systems Basic or GIT Systems Advanced |
| GeoSpec 12/3D |
12 |
53 |
3D |
GIT Systems 3D Imaging |
| GeoSpec 2 |
2 |
53 |
None |
LithoMetrix or GIT Systems Basic |
| GeoSpec 2 |
2 |
53 |
1D |
GIT Systems Basic or GIT Systems Advanced |