Advanced Multi-Physics Sensor Utilizing Molecular Fingerprinting for Production Logging Tool

Knowledge of fluid density along with phase measurement are extremely important for reducing the variance in estimating the flow profile from the production logging tool (PLT). When both oil and water are produced simultaneously, induced reflectance measurement derived from the optical refractive index is not effective. This is mainly due to phase persistence behaviour of the optical sensor caused by the coating of the previous phases. The most effective way to characterize such flow is to measure the fluid's fluorescence along with refractive index and density. In this paper, a novel solution is presented using a piezo helm resonator sensor with simultaneous and congruent measurements of fluid mass density, viscosity and sound speed.