Methods and systems for detecting rfid tags in a borehole environment

摘要: Sensor assemblies are deployed in a borehole for well, such as an oil well or other hydrocarbon recovery well. The sensor may be coupled to casing string (e.g., the exterior of casing), and detect RFID tags properties material fluids) annulus surrounding string. During cementing operations, used track fluids. detection circuits scan at different frequencies, corresponding results compared by various means processes determine presence tags.