WELLBORE INFLUX DETECTION IN A MARINE RISER
First Claim
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1. A method for managing wellbore influx, comprising:
- identifying a difference between measured values provided by a plurality of sensors longitudinally spaced along a riser;
determining whether a difference between measured values provided by a given pair of the sensors has changed relative to the difference between measured values previously provided by the given pair of the sensors;
determining based on the change in the difference whether wellbore influx is present in the riser.
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Abstract
Methods and apparatus for managing wellbore influx in a marine riser. In one embodiment, a method for managing wellbore influx includes identifying a difference between measured values provided by a plurality of sensors longitudinally spaced along a riser. Whether the difference between measured values provided by a given pair of the sensors has changed relative to a difference between measured values previously provided by the given pair of the sensors is determined. Whether wellbore influx is present in the riser is determined based on the change in the difference.
22 Citations
34 Claims
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1. A method for managing wellbore influx, comprising:
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identifying a difference between measured values provided by a plurality of sensors longitudinally spaced along a riser; determining whether a difference between measured values provided by a given pair of the sensors has changed relative to the difference between measured values previously provided by the given pair of the sensors; determining based on the change in the difference whether wellbore influx is present in the riser. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for managing wellbore influx, comprising:
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a riser; an array of sensors disposed at intervals along the length of the riser, the sensors configured to measure one or more parameters indicative of wellbore influx within the riser; and influx analysis logic configured to detect wellbore influx in the riser based on a difference in measurement values provided by two of the sensors. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A marine riser, comprising:
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a plurality of riser tubes connected end-to-end and extending from a blowout preventer to a surface installation; sensors distributed along at least some of the tubes, the sensors configured to measure a condition of fluid in the tubes; and a riser monitoring system communicatively coupled to the sensors and configured to; collect measurement values generated by the sensors; and detect influx of formation fluid into the riser based on a difference between measurement values provided by two of the sensors. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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Specification