Impedance Spectroscopy Measurement Device And Methods For Analysis Of Live Reservoir Fluids And Assessment Of In-Situ Corrosion Of Multiple Alloys
First Claim
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1. A formation fluid sample testing instrument, comprising:
- a sealed chamber for receiving a sample of formation fluid, the sealed chamber maintainable at a selected temperature and pressure;
at least one electrode sealingly passing through a wall of the sealed chamber and extended into contact with the sample of fluid in the chamber; and
a power supply electrically connected to the at least one electrode, the power supply configured to generate direct current and alternating current having a selectable frequency.
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Abstract
A method for analyzing fluid withdrawn from a subsurface formation includes disposing the withdrawn fluid in a chamber and maintaining the fluid in the chamber substantially at a same temperature and pressure as exists in the subsurface formation. Electric current is passed through the fluid in the chamber using at least one electrode made from a selected metal, the electric current comprising direct current and alternating current of frequency sufficient to determine at least one of (i) resistance of the fluid sample in the chamber directly and (ii) from the direct current determine a polarization resistance of the at least one electrode.
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Citations
16 Claims
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1. A formation fluid sample testing instrument, comprising:
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a sealed chamber for receiving a sample of formation fluid, the sealed chamber maintainable at a selected temperature and pressure; at least one electrode sealingly passing through a wall of the sealed chamber and extended into contact with the sample of fluid in the chamber; and a power supply electrically connected to the at least one electrode, the power supply configured to generate direct current and alternating current having a selectable frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for analyzing fluid withdrawn from a subsurface formation, comprising:
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disposing the withdrawn fluid in a chamber; maintaining the fluid in the chamber substantially at a same temperature and pressure as exists in the subsurface formation; and passing electric current through the fluid in the chamber using at least one electrode made from a selected metal, the electric current comprising direct current and alternating current of frequency sufficient to determine resistance of the fluid sample in the chamber directly, and from the direct current determine a polarization resistance of the at least one electrode; wherein the fluid resistance provides reservoir information and the electrode resistance provides well integrity of downhole metals and alloys thereof. - View Dependent Claims (13, 14, 15, 16)
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Specification