| 摘要 |
Investigation of properties of a porous solid sample 19, such as a rock core, is carried out using apparatus performing both nuclear magnetic resonance (NMR) and porosimetry measurements. The apparatus has a magnet 11, 12 providing a magnetic field and a radiofrequency coil 20 for transmitting and receiving electromagnetic radiation. A pressure vessel 14, 15 holds the sample within the magnetic field while a supply of a nonâ wetting liquid 30, such as mercury, is connected to the vessel and means to apply pressure 32 to the nonâ wetting liquid is used to force liquid into pores of the sample. The applied pressure and the volume of the liquid taken up by the sample can be measured. The pressure may be increased in steps, using intruded liquid volume at each step to give a measurement of pore throat size and using NMR at each step to give a measure of pore size. |
