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    Well and overburden monitoring using distributed acoustic sensors
    3.
    发明授权
    Well and overburden monitoring using distributed acoustic sensors 有权

    公开(公告)号：US10975687B2

    公开(公告)日：2021-04-13

    申请号：US16566711

    申请日：2019-09-10

    Applicant: BP Exploration Operating Company Limited

    Inventor： Tommy Langnes ,  Pradyumna Thiruvenkatanathan

    IPC: E21B47/107 ,  E21B47/117 ,  G01N29/11 ,  G01N29/44 ,  G01V1/00

    Abstract: A method of detecting a leak event within a wellbore can include inducing a pressure differential within a wellbore comprising a fluid, obtaining a sample data set representative of the acoustic signal across a frequency spectrum while inducing the pressure differential, determining a plurality of frequency domain features of the sample data set, determining a presence of a leak event at one or more depths within the wellbore based on determining that the plurality of frequency domain features match a leak event signature, correlating the leak event with the induced pressure differential, and determining a presence and location of a leak within the wellbore based on the presence of the leak event and the correlating of the leak event with the induced pressure differential.

    Detecting downhole sand ingress locations
    5.
    发明授权
    Detecting downhole sand ingress locations 有权

    公开(公告)号：US11199085B2

    公开(公告)日：2021-12-14

    申请号：US16639774

    申请日：2018-08-23

    Applicant: BP Exploration Operating Company Limited

    Inventor： Tommy Langnes ,  Pradyumna Thiruvenkatanathan

    IPC: E21B47/107 ,  E21B43/12 ,  E21B47/135 ,  G01H3/04 ,  G01H9/00

    Abstract: A method of detecting sand ingress within a wellbore includes obtaining a sample data set, determining a plurality of frequency domain features of the sample data set over a plurality of depth ranges, determining a presence of sand ingress at a first depth range of the plurality of depth ranges within the wellbore based on determining that the plurality of frequency domain features over the first depth range match a sand ingress signature, and determining a presence of sand migration along a second depth range of the plurality of depths within the wellbore based on determining that the plurality of frequency domain features over the second depth range match a sand migration 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.

    Detecting events using acoustic frequency domain features
    6.
    发明授权
    Detecting events using acoustic frequency domain features 有权

    公开(公告)号：US11333636B2

    公开(公告)日：2022-05-17

    申请号：US16755211

    申请日：2018-10-10

    Applicant: BP Exploration Operating Company Limited

    Inventor： Tommy Langnes ,  Pradyumna Thiruvenkatanathan

    IPC: G01N29/44 ,  G01H9/00 ,  G01M3/24 ,  G01N29/46 ,  G01W1/00

    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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