A reservoir production management system includes a plurality of dielectric spectrometers disposed at different locations along the length of production tubing within a wellbore, each of the plurality dielectric spectrometers being in fluid communication with separate producing zones of the reservoir, wherein the plurality of dielectric spectrometers are configured to detect one or more dielectric properties by measuring the response of incident radio waves through fluids from each of the respectively separate producing zones, and a plurality of valves in the production tubing to selectively control production from each of the respectively separate producing zones in response to detected dielectric fluid properties.