System and method for distributed environmental parameter measurement
First Claim
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1. An apparatus for measuring environmental parameters, comprising:
- a carrier configured to be disposed in a borehole in an earth formation;
an optical fiber sensor disposed at the carrier, the optical fiber sensor including an optical fiber having a length configured to be disposed along a path in an environment to be measured and including at least one measurement location disposed therein, the path of the optical fiber defining a longitudinal axis; and
at least one section of the optical fiber sensor including a portion of the length of the optical fiber having a plurality of measurement locations extending along the portion and configured to provide environmental parameter measurements, the plurality of measurement locations of the portion of the length disposed at substantially the same location on the longitudinal axis to maintain the plurality of measurement locations at an at least substantially homogeneous environmental parameter; and
a processor configured to receive the environmental parameter measurements from the plurality of measurement locations and calibrate the optical fiber sensor based on the environmental parameter measurements.
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Abstract
An apparatus for measuring environmental parameters includes: an optical fiber sensor configured to be disposed along a path in an environment to be measured, the path of the optical fiber sensor defining a longitudinal axis; and at least one section of the optical fiber sensor configured so that an entire length of the at least one section is exposed to an at least substantially homogeneous environmental parameter, at least part of the at least one section extending in a direction having a radial component relative to the longitudinal axis.
28 Citations
20 Claims
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1. An apparatus for measuring environmental parameters, comprising:
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a carrier configured to be disposed in a borehole in an earth formation; an optical fiber sensor disposed at the carrier, the optical fiber sensor including an optical fiber having a length configured to be disposed along a path in an environment to be measured and including at least one measurement location disposed therein, the path of the optical fiber defining a longitudinal axis; and at least one section of the optical fiber sensor including a portion of the length of the optical fiber having a plurality of measurement locations extending along the portion and configured to provide environmental parameter measurements, the plurality of measurement locations of the portion of the length disposed at substantially the same location on the longitudinal axis to maintain the plurality of measurement locations at an at least substantially homogeneous environmental parameter; and a processor configured to receive the environmental parameter measurements from the plurality of measurement locations and calibrate the optical fiber sensor based on the environmental parameter measurements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of monitoring an environmental parameter measurement apparatus, comprising:
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disposing an optical fiber sensor along a path in an environment to be measured, the optical fiber sensor including an optical fiber having a length disposed along a path defining a longitudinal axis and including at least one measurement location disposed therein, the optical fiber sensor including at least one section including a portion of the length of the optical fiber having a plurality of measurement locations disposed along the portion, the plurality of measurement locations of the portion of the length disposed at substantially the same location on the longitudinal axis to maintain the plurality of measurement locations at an at least substantially homogeneous environmental parameter; transmitting an electromagnetic measurement signal into the optical fiber sensor and receiving return signals from the at least one measurement location disposed in the axial length of the optical fiber and the plurality of measurement locations disposed in the portion of the length; estimating the environmental parameter at each measurement location and generating a profile, the profile including at least one profile portion corresponding to the portion of the length; and calibrating the optical fiber sensor based on the at least one profile portion. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification