Patent ID: 11965845
Assignee: INSTITUTE OF GEOLOGY AND GEOPHYSICS, CHINESE ACADEMY OF SCIENCES
Field: Measurement (Instruments)
Classification: CPC G  Y | IPC G

Claim 2:
3. The method for measuring fluid saturation in nuclear magnetic resonance (NMR) on-line displacement according to claim 1, characterized in that, the measuring a nuclear magnetic resonance (NMR) T2 spectrum of a process in which the core to be measured is converted from a saturated displaced phase fluid into a displacing phase fluid to generate a displacement process T2 spectrum, includes:
saturating the core to be measured with the displaced phase fluid and filling it into the core holder;
applying a predetermined confining pressure to the core holder by means of a ring pressure pump and a pressure gauge on the third pipe;
opening the valves on the liquid discharge end evacuation pipe and the liquid inlet end evacuation pipe respectively, and filling the displacing phase fluid into the dead volume of the on-line displacement system;
closing the valves on the liquid discharge end evacuation pipe and the liquid inlet end evacuation pipe;
injecting the displacing phase fluid in the intermediate container into the core to be measured by an injection device;
performing NMR scanning on the displacement process of the core to be measured to generate the displacement process T2 spectrum.