System and method for monitoring down-hole fluids
First Claim
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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.
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Abstract
In one aspect the present invention provides a down-hole monitoring system, comprising one or more pieces of down-hole equipment, for example a down-hole logging tool, and at least one resonant sensor for obtaining physical and chemical parameters of a down-hole fluid in proximity to the sensor. In another aspect, the present invention provides a method for detecting material properties of a down-hole fluid, the method comprising placing a resonant LCR sensor within a piece of down-hole equipment, taking sensor readings down-hole, transmitting the sensor readings to a reader device, and analyzing the sensor readings.
12 Citations
22 Claims
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1. A down-hole monitoring system, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for detecting material properties of a down-hole fluid, comprising:
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placing at least one resonant sensor within down-hole equipment; taking sensor readings down-hole; transmitting the sensor readings to a reader device; and analyzing the sensor readings; 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. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A down-hole fluid monitoring system comprising:
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down-hole equipment; and at least one resonant sensor comprising a sensing film; wherein the resonant sensor comprises a single resonant inductor-capacitor-resistor (LCR) circuit and the sensing film, the sensing film being 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 film 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 film enables the sensor to selectively detect one or more analytes sought to be detected in the down-hole fluid substantially independent of temperature. - View Dependent Claims (22)
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Specification