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公开(公告)号：US20190120044A1
公开(公告)日：2019-04-25
申请号：US16091929
申请日：2017-04-06
Applicant: BP Exploration Operating Company Limited
Inventor： Tommy LANGNES , Pradyumna THIRUVENKATANATHAN
Abstract: A method of detecting an event within a wellbore includes obtaining a sample data set, determining a plurality of frequency domain features of the sample data set, comparing the plurality of frequency domain features with an event signature, determining that the plurality of frequency domain features matches the thresholds, ranges, or both of the event signature, and determining the presence of the event within the wellbore based on determining that the plurality of frequency domain features match the thresholds, ranges, or both of the event signature. The sample data set is a sample of an acoustic signal originating within a wellbore including a fluid. The sample data set is representative of the acoustic signal across a frequency spectrum. The event signature includes a plurality of thresholds, ranges, or both corresponding to the plurality of frequency domain features.
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公开(公告)号：US20200291772A1
公开(公告)日：2020-09-17
申请号：US16817559
申请日：2020-03-12
Applicant: BP Exploration Operating Company Limited
Inventor： Pradyumna THIRUVENKATANATHAN , Tommy LANGNES
Abstract: A monitoring system, comprising a flow line comprising at least one bend, an optical fiber coupled to an exterior of the flow line, wherein the optical fiber is wrapped around at least a portion of the flow line, and a receiver coupled to an end of the optical fiber, wherein the receiver is configured to detect at least one acoustic signal from the optical fiber.
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公开(公告)号：US20200174149A1
公开(公告)日：2020-06-04
申请号：US16698407
申请日：2019-11-27
Applicant: BP Exploration Operating Company Limited , Lytt Limited
Inventor： Pradyumna THIRUVENKATANATHAN
Abstract: A method of identifying events includes obtaining an acoustic signal from a sensor, determining one or more frequency domain features from the acoustic signal, providing the one or more frequency domain features as inputs to a plurality of event detection models, and determining the presence of one or more events using the plurality of event detection models. The one or more frequency domain features are obtained across a frequency range of the acoustic signal, and at least two of the plurality of event detection models are different.
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公开(公告)号：US20200256834A1
公开(公告)日：2020-08-13
申请号：US16755211
申请日：2018-10-10
Applicant: BP Exploration Operating Company Limited
Inventor： Tommy LANGNES , Pradyumna THIRUVENKATANATHAN
Abstract: A system for processing acoustic data to identify an event includes a receiver unit including a processor and a memory. The receiver unit is configured to receive a signal from a sensor disposed along a sensor path or across a sensor area. A processing application is stored in the memory. The processing application, when executed on the processor, configures the processor to: receive the signal from the sensor, where the signal includes an indication of an acoustic signal received at one or more lengths along the sensor path or across a portion of the sensor area and the signal is indicative of the acoustic signal across a frequency spectrum; determine a plurality of frequency domain features of the signal across the frequency spectrum; and generate an output comprising the plurality of frequency domain features.
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公开(公告)号：US20220414301A1
公开(公告)日：2022-12-29
申请号：US17294759
申请日：2019-11-27
Applicant: BP Exploration Operating Company Limited , Lytt Limited
Inventor： Pradyumna THIRUVENKATANATHAN
IPC: G06F30/28 , E21B47/107 , G01V99/00
Abstract: A method of identifying events includes obtaining an acoustic signal from a sensor, determining one or more frequency domain features from the acoustic signal, providing the one or more frequency domain features as inputs to a plurality of event detection models, and determining the presence of one or more events using the plurality of event detection models. The one or more frequency domain features are obtained across a frequency range of the acoustic signal, and at least two of the plurality of event detection models are different.
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Patent Agency Ranking
公开(公告)号：US20220251943A1
公开(公告)日：2022-08-11
申请号：US17618433
申请日：2019-06-25
Applicant: BP Exploration Operating Company Limited
Inventor： Pradyumna THIRUVENKATANATHAN , Tommy LANGNES
IPC: E21B47/107
Abstract: A method of abandoning a wellbore can include obtaining a first sample data set within a wellbore, wherein the first sample data set is a sample of an acoustic signal originating within the wellbore; determining a plurality of frequency domain features of the first sample data set; identifying a fluid flow location within the wellbore using the first plurality of frequency domain features; setting a barrier at or above the fluid flow location; obtaining a second sample data set above the barrier, wherein the second sample data set is a sample of an acoustic signal originating within the wellbore above the barrier; determining a second plurality of frequency domain features of the second sample data set; and identifying that a fluid flow rate or flow mechanism at the fluid flow location has been reduced or eliminated and/or identifying another fluid flow location using the second plurality of frequency domain features.
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公开(公告)号：US20210389486A1
公开(公告)日：2021-12-16
申请号：US17295368
申请日：2019-11-27
Applicant: BP Exploration Operating Company Limited
Inventor： Pradyumna THIRUVENKATANATHAN
Abstract: A method of identifying inflow locations along a wellbore comprises obtaining an acoustic signal from a sensor within the wellbore, determining a plurality of frequency domain features from the acoustic signal, and identifying, using a plurality of fluid flow models, a presence of at least one of a gas phase inflow, an aqueous phase inflow, or a hydrocarbon liquid phase inflow at one or more fluid flow locations. The acoustic signal comprises acoustic samples across a portion of a depth of the wellbore, and the plurality of frequency domain features are obtained across a plurality of depth intervals within the portion of the depth of the wellbore. Each fluid flow model of the plurality of fluid inflow models uses one or more frequency domain features of the plurality of the frequency domain features, and at least two of the plurality of fluid flow models are different.
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公开(公告)号：US20210047916A1
公开(公告)日：2021-02-18
申请号：US16992315
申请日：2020-08-13
Inventor： Pradyumna THIRUVENKATANATHAN , Fei CAO
IPC: E21B47/107 , E21B47/135 , G01H9/00 , G01V1/30 , G01V1/28
Abstract: A method of characterizing an inflow into a wellbore includes obtaining an acoustic signal from a sensor within the wellbore. In addition, the method includes determining a plurality of frequency domain features from the acoustic signal. Further, the method includes identifying at least one of a gas phase flow, an aqueous phase flow, or a hydrocarbon liquid phase flow using the plurality of the frequency domain features. The method also includes classifying a flow rate of the at least one of the gas phase flow, the aqueous phase flow, or the hydrocarbon liquid phase flow using the plurality of frequency domain features. The acoustic signal comprises acoustic samples across a portion of a depth of the wellbore.
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公开(公告)号：US20200182047A1
公开(公告)日：2020-06-11
申请号：US16091519
申请日：2017-04-06
Applicant: BP Exploration Operating Company Limited
Inventor： Tommy LANGNES , Pradyumna THIRUVENKATANATHAN
Abstract: A method of detecting sand inflow into a wellbore is disclosed. The method can include obtaining a sample data set, detecting a broadband signal within the sample data set, comparing the broadband signal with a signal reference, determining that the broadband signal meets or exceeds the signal reference, and determining the presence of sand inflow into the wellbore based on determining that the broadband signal meets or exceeds the signal reference. The sample data set can be a sample of an acoustic signal originating within a wellbore comprising a fluid, and the broadband signal at least includes a portion of the sample data set at frequencies above 0.5 kHz.
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公开(公告)号：US20200173273A1
公开(公告)日：2020-06-04
申请号：US16698335
申请日：2019-11-27
Applicant: BP Exploration Operating Company Limited
Inventor： Pradyumna THIRUVENKATANATHAN
IPC: E21B47/10
Abstract: A method of identifying inflow locations along a wellbore includes obtaining an acoustic signal from a sensor within the wellbore, determining a plurality of frequency domain features from the acoustic signal, and identifying, using a plurality of fluid flow models, a presence of at least one of a gas phase inflow, an aqueous phase inflow, or a hydrocarbon liquid phase inflow at one or more fluid flow locations. The acoustic signal includes acoustic samples across a portion of a depth of the wellbore, and the plurality of frequency domain features are obtained across a plurality of depth intervals within the portion of the depth of the wellbore. Each fluid flow model of the plurality of fluid inflow models uses one or more frequency domain features of the plurality of the frequency domain features, and at least two of the plurality of fluid flow models are different.
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