Monitoring fluid migration using in-situ nuclear magnetic resonance core flooding system integrated with fiber optic sensors: A proof of concept

In-situ nuclear magnetic resonance (NMR) core flooding system has enabled researchers to monitor several rock properties such as porosity, pore size distribution, and fluid saturation along the tested samples with high resolutions under reservoir conditions. However, spatially resolved strength/mechanical property alteration coupled migration/substitution remains poorly characterized. To this end, Fiber Bragg Grating (FBG) multiplex sensors were integrated NMR strength changes, or generally speaking, observe hydro-mechanical-chemical coupling mechanisms during tests. In study, we present a novel approach on how conduct experiments, while simultaneously monitoring FBG strain response of limestone plug. The cell was modified integrate technology without impeding signal pressure/temperature capacity. A spatial resolution optical fiber attached onto sample radial surface. results show successful association track any change at each stage brine injection. is capable measuring variations induced by rock-fluid interactions injection, allowing it capture front location faster rate than NMR.