Downhole fluid characterization methods and systems using multi-electrode configurations
First Claim
1. A method comprising:
- placing a tubular base structure having a multi-electrode configuration disposed thereon in at least a portion of a well bore penetrating at least a portion of a subterranean formation, the multi-electrode configuration comprising at least first and second electrodes with a dielectric layer between the tubular base structure and the electrodes, wherein the first electrode is positioned at a first height radially from an outer surface of the tubular base structure and at least another of the electrodes is positioned at a second height radially from an outer surface of the tubular base structure that is greater than or less than the first height, wherein the tubular base structure comprises a casing;
collecting electromagnetic measurements using the multi-electrode configuration; and
processing the electromagnetic measurements to obtain a characterization of at least one fluid in an annulus between the tubular base structure and an inner wall of the well bore.
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Abstract
Systems and methods using multi-electrode configurations for characterizing fluids in subterranean formations during various treatment operations are provided. In certain embodiments, the methods comprise: placing a tubular base structure having a multi-electrode configuration disposed thereon in at least a portion of a well bore penetrating at least a portion of a subterranean formation, the multi-electrode configuration comprising at least first and second electrodes with a dielectric layer between the tubular base structure and the electrodes; collecting electromagnetic measurements using the multi-electrode configuration; and processing the electromagnetic measurements to obtain a characterization of at least one fluid in an annulus between the tubular base structure and an inner wall of the well bore. The first and second electrodes of the multi-electrode configuration may be oriented along non-parallel planes and/or positioned at different heights from an outer surface of the tubular base structure.
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Citations
20 Claims
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1. A method comprising:
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placing a tubular base structure having a multi-electrode configuration disposed thereon in at least a portion of a well bore penetrating at least a portion of a subterranean formation, the multi-electrode configuration comprising at least first and second electrodes with a dielectric layer between the tubular base structure and the electrodes, wherein the first electrode is positioned at a first height radially from an outer surface of the tubular base structure and at least another of the electrodes is positioned at a second height radially from an outer surface of the tubular base structure that is greater than or less than the first height, wherein the tubular base structure comprises a casing; collecting electromagnetic measurements using the multi-electrode configuration; and processing the electromagnetic measurements to obtain a characterization of at least one fluid in an annulus between the tubular base structure and an inner wall of the well bore. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A fluid characterization system comprising:
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a tubular base structure having a multi-electrode configuration disposed thereon in at least a portion of a well bore penetrating at least a portion of a subterranean formation, the multi-electrode configuration comprising at least first and second electrodes with a dielectric layer between the tubular base structure and the electrodes, wherein the first electrode is positioned at a first height radially from an outer surface of the tubular base structure and at least another of the electrodes is positioned at a second height radially from an outer surface of the tubular base structure that is greater than or less than the first height, wherein the tubular base structure comprises a casing; an electronic control unit electrically coupled to the first and second electrodes; and a processor electrically coupled to the electronic control unit and the electrodes. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification