A method and device for measuring rock capillary pressure in reservoir temperature and pressure environment
A technology of capillary pressure and environment, applied in the direction of measuring devices, suspension and porous material analysis, instruments, etc., can solve problems such as obtaining porosity, high equipment cost or time cost, and inability to effectively obtain the capillary pressure curve of the removed rock part, etc. To achieve the effect of small disturbance
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Embodiment 1
[0057] A method for measuring rock capillary pressure in a reservoir temperature and pressure environment, the steps of which are:
[0058] (1) Select a relatively representative rock sample with a diameter of 25mm and a length of 50mm among the core samples taken from a tight sandstone gas reservoir in the Sichuan Basin. Set aside to dry.
[0059] (2) The confining pressure of the core is 5MPa, and the temperature is set at 60°C.
[0060] (3) The rock core 1 is vacuumized for more than eight hours and less than sixteen hours.
[0061] (4) The core 1 is placed in the main magnetic field environment created by the permanent magnet 2 to carry out the self-priming experiment process.
[0062] (5) The NMR console 3 controls the probe coil 4 to transmit CPMG pulse sequences to the rock core 1 at regular intervals. After the pulse sequence is transmitted, the probe coil 4 receives the relaxation signal fed back from the core 1 . The NMR console 3 inverts the relaxation signal in...
Embodiment 2
[0077] A device for measuring the capillary pressure of rocks under the temperature and pressure environment of the reservoir, which includes a nuclear magnetic resonance equipment unit and a pressure loading unit. The nuclear magnetic resonance equipment unit includes a permanent magnet 2, a nuclear magnetic resonance console 3, and a probe coil 4, which are connected through a USB data cable; the pressure loading unit includes a rock core 1, a rubber sleeve 5, a core holder 6, a nitrogen cylinder 7, and a displacement pump 8 , the first pressure gauge 9, the first needle valve 10, the first piston container 11, the second needle valve 12, the first electric heating jacket 13, the vacuum pump 14, the third needle valve 15, the second pressure gauge 16, the fourth needle The valve 17, the fifth needle valve 18, the sixth needle valve 19, the second piston container 20, and the second electric heating sleeve 21 are connected through pipelines, and the characteristics are that th...
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