Core nuclear magnetic resonance NMR is essential for basic work, early large number of nuclear magnetic core analysis of nuclear magnetic logging work for a solid foundation. Previous research work includes the main principles of porous rock logging applications, such as fluid surface relaxation, Rock Core NMR & MRI bulk relaxation and diffusion relaxation properties; rock porosity, permeability, pore structure, wettability and relaxation characteristics of the relationship A lot of experimental studies have been carried out in the fields of bound fluid, fluid relaxation properties, oil, water and gas relaxation characteristics. At the same time, Rock Core NMR & MRI the hypothesis and approximation of the experimental data in the analysis and processing have been fully elucidated, Resonance logging data for rock physical parameters, identification of oil, gas, water, forecasting capacity and other aspects of the establishment of the application basis.
Nuclear magnetic core analysis is essential for nuclear magnetic logging basic work, a large number of early nuclear magnetic core analysis of nuclear magnetic logging work for a solid foundation. Previous research work includes the main principles of porous rock logging applications, Rock Core NMR & MRI such as fluid surface relaxation, bulk relaxation and diffusion relaxation properties; rock porosity, permeability, pore structure, wettability and relaxation characteristics of the relationship ; Bound fluid
The scientificity and accuracy of the selection directly affect the measurement results of parameters such as saturation of magnetic fluid, magnetic fluid saturation, and fluid saturation. Centrifugal method is widely used at home and abroad to determine the T2 cut-off value of the method, Rock Core NMR & MRI the majority of experts and scholars at home and abroad use 100psi as the calibration of sandstone and carbonate core T2 cutoff value of the best centrifugal force. In recent years, most of the cutoffs of sandstone T2 are about 33ms and most of the carbonate rocks are concentrated in the range of 90 ~ 100ms. Domestic scholars generally believe that the T2 cutoff value of the core of the sedimentary rock reservoir is less than 33ms, and the volcanic rock and gas core T2 Cut-off reports. A large number of core analysis experiments show that 100psi as a calibration core T2 cutoff value of the centrifugal force on the low porosity, low permeability gritstone core and ...
The relationship between the T2 spectrum and pore throat structure, the influence of particle size, the influence of fracture hole, the change rule of T2 cutoff and the pore permeability of nuclear magnetic analysis were analyzed by core nuclear magnetic resonance (NMR) Parameters and conventional analysis of the relationship between pore permeability parameters, and made some new understanding and conclusions. The experimental results show that the magnetic resonance T2 distribution spectrum reflects the pore structure of the rock, Rock Core NMR & MRI which reflects the pore size distribution, and has a good effect in evaluating the pore structure and reservoir effectiveness of carbonate rocks. The effect of resonance measurement is very small and the lower limit of particle size is 2mm. The cuttings drilled by the grinding PDC bit or with the cuttings are not suitable for the application of nuclear magnetic resonance technology. The T2 cutoff value of the carbonate formation is not The T2 distribution spectrum can not effectively reflect the parameters of fractured porosity, but the T2 spectrum can qualitatively identify the reservoirs of pore development.
Core Nuclear Magnetic Resonance Product Function:
1, the oil content of water content detection;
2, water phase quantitative analysis;
3, T2 *, T2, T1 relaxation time analysis;
4, proton density, T2 - weighted, T1 - weighted imaging
5, spatial distribution of water analysis;
6, porous media physical evaluation.
1, magnet type: permanent magnet;
2, the magnetic field strength: 0.5 ± 0.05T, the instrument main frequency: 21.3MHz;
3, probe coil diameter: 60mm;
4, effective sample detection range: Ø60mm × H60mm.