Device and method for measuring fluid saturation in nuclear magnetic resonance on-line displacement

Device and Method for Measuring Fluid Saturation in Nuclear Magnetic Resonance On-line Displacement Abstract The present invention provides a device and a method for measuring fluid saturation in nuclear magnetic resonance (NMR) on-line displacement, the method comprising: measuring a nuclear magnetic resonance (NMR) T2 spectrum under the dead volume filling of the on-line displacement system as displacing phase fluid and the core to be measured as saturated nuclear magnetic detection phase fluid to generate a calibrated T2 spectrum; 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; generating the fluid saturation of the on-line displacement system in real time according to the generated calibrated T2 spectrum and the displacement process T2 spectrum. By the device and the method for measuring fluid saturation in nuclear magnetic resonance (NMR) on-line displacement, the boundary point between the saturated fluid and the dead volume fluid in T2 spectrum is determined by observing the change characteristics of the T2 spectrum, so that only the saturated fluid signal can be counted, and the influence of the dead volume fluid can be shielded, so as to achieve the purpose of improving measurement precision of fluid saturation in the on-line displacement process. zX 2-11 2-2 2-3 2 2-12 2-4 2-6 2-112 2-2-7 2-9 2-8 measuring a nuclear magnetic resonance (NMR) T2 spectrum under the dead volume filling of the on-line displacement system as displacing phase fluid and the core to be measured as saturated nuclear magnetic detection phase fluid to generate a calibrated T2 spectrum measuring a nuclear magnetic resonance (NMR) T2 spectrum of a process in which the core to be measured is converted from a 200 saturated displaced phase fluid into a displacing phase fluid to generate a displacement process T2 spectrum generating the fluid saturation of the on-line displacement system in real time according to the calibrated T2 spectrum and the 300 displacement process T2 spectrum