Apparatus and method for multi-component wellbore electric field Measurements using capacitive sensors
First Claim
1. A method for collecting reservoir data comprising the steps of:
- (a) providing an at least one electromagnetic sensor equipped with capacitive electrodes within a subterranean well, the at least one electromagnetic sensor comprising at least one tri-axial capacitive electrode sensor;
(b) positioning an at least one electromagnetic field source separately from the at least one electromagnetic sensor;
(c) generating an electromagnetic field in the reservoir with the at least one electromagnetic field source, the electromagnetic field comprising tri-axial electric and magnetic fields;
(d) measuring the electromagnetic field in a plurality of dimensions with the at least one electromagnetic sensor to collect measured data; and
(e) generating a model of the reservoir with the measured data.
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Abstract
A method and apparatus is provided for collecting reservoir data. The method includes providing one or more electromagnetic sources for generating an electromagnetic field in a reservoir and providing one or more electromagnetic sensors equipped with capacitive electrodes. The electromagnetic source is located separately from the electromagnetic sensor. The electromagnetic sensor may either be located within a well or at the surface, is capable of measuring the electromagnetic field in three dimensions, and may be isolated from the well fluids. The data collected by the electromagnetic sensors can be used to create a model of the oil reservoir, including the water saturation.
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Citations
43 Claims
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1. A method for collecting reservoir data comprising the steps of:
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(a) providing an at least one electromagnetic sensor equipped with capacitive electrodes within a subterranean well, the at least one electromagnetic sensor comprising at least one tri-axial capacitive electrode sensor; (b) positioning an at least one electromagnetic field source separately from the at least one electromagnetic sensor; (c) generating an electromagnetic field in the reservoir with the at least one electromagnetic field source, the electromagnetic field comprising tri-axial electric and magnetic fields; (d) measuring the electromagnetic field in a plurality of dimensions with the at least one electromagnetic sensor to collect measured data; and (e) generating a model of the reservoir with the measured data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for collecting oil reservoir data comprising:
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(a) positioning at least one electromagnetic field source at a location separate from at least one electromagnetic sensor; (b) generating an electromagnetic field in the vicinity of the reservoir by the at least one electromagnetic field source, the electromagnetic field comprising tri-axial electric and magnetic fields; (c) positioning the at least one electromagnetic sensor at a fixed location in a subterranean well, the at least one electromagnetic sensor comprising a tri-axial capacitive electrode sensor configured to measure the tri-axial electric field in a plurality of dimensions; and (d) measuring and reporting electric field strength in the plurality of dimensions through employment of the tri-axial capacitive electrode sensor, and changes in the magnetic field in the plurality of dimensions over time. - View Dependent Claims (19, 20, 21, 22)
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23. An apparatus for collecting reservoir data comprising:
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an at least one electromagnetic source for generating an electromagnetic field in the reservoir, the electromagnetic field comprising tri-axial electric and magnetic fields; and an at least one electromagnetic sensor comprising at least one tri-axial capacitive electrode sensor including capacitive electrodes, located within a subterranean well, and configured to measure the electric field in a plurality of dimensions;
whereinthe at least one electromagnetic source is located separately from the at least one electromagnetic sensor. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification