Patent ID: 9045973
Filing Date: 2015-06-02
Classification: E21B,H04B

Abstract:
1. A down-hole monitoring system, comprising: down-hole equipment; and at least one resonant sensor for obtaining physical and chemical parameters of a down-hole fluid; wherein the resonant sensor comprises a single resonant inductor-capacitor-resistor (LCR) circuit and a sensing material disposed over a sensing region, wherein the sensing region comprises at least a portion of the single LCR circuit, and wherein temperature-dependent response coefficients of inductance L, capacitance C, and resistance R properties of the single LCR circuit and the sensing material are at least 5 percent different from one another, and wherein the difference in the temperature-dependent response coefficients of the properties of the single LCR circuit and sensing material enables the sensor to selectively detect one or more analytes sought to be detected in the down-hole fluid substantially independent of temperature.