This NMR displacement analysis system can be used to analyze the physical parameters such as porosity and seepage saturation of conventional and unconventional oil and gas reservoirs, multiphase displacement seepage experiments and intuitive imaging to characterize the pore distribution and oil and gas distribution in the core. The main application areas include: porous media porosity; pore size distribution; permeability; Fluid saturation, T1, T2 cut-off; Physical property evaluation of porous media; displacement seepage experiment; multiphase displacement experiment; Crack imaging.

1. Magnet type: permanent magnet; Magnetic field strength: 0.3T±0.05T;
2. Magnetic field uniformity: ≤30pm (Ø110 sphere);
3. Magnetic field stability: ≤300Hz/hour;
4. Magnet temperature: nonlinear and precise constant temperature control, adjustable within the range of 25~35°C;
5. RF field: pulse frequency range 1~30MHz;
6. RF transmit power: peak output is greater than 300W;
7. Maximum sampling bandwidth: 2000KHz;
8. Imaging gradient: X, Y, Z gradient amplifier;
9. Probe coil diameter: 60mm (standard);
10. Effective sample detection range: Ø60mm×H60mm;
11. Imaging quality: image signal-to-noise ratio is greater than 20db, image distortion is less than 15%, and image uniformity is greater than 45%;
12. The number of CPMG echoes is at least 18,000, and the shortest echo time is less than 360 microseconds (standard probe coil); 13. Sampling rate: 50MHz;