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    LOW FREQUENCY DISTRIBUTED ACOUSTIC SENSING HYDRAULIC FRACTURE GEOMETRY
    3.
    发明申请
    LOW FREQUENCY DISTRIBUTED ACOUSTIC SENSING HYDRAULIC FRACTURE GEOMETRY 审中-公开

    公开(公告)号：US20190120047A1

    公开(公告)日：2019-04-25

    申请号：US16163115

    申请日：2018-10-17

    Applicant: ConocoPhillips Company

    Inventor： Ge JIN ,  Baishali ROY

    IPC: E21B49/00 ,  E21B43/26 ,  G01V1/22

    Abstract: Monitoring and diagnosing completion during hydraulic fracturing operations provides insights into the fracture geometry, inter-well frac hits and connectivity. Conventional monitoring methods (microseismic, borehole gauges, tracers, etc.) can provide a range of information about the stimulated rock volume but may often be limited in detail or clouded by uncertainty. Utilization of DAS as a fracture monitoring tool is growing, however most of the applications have been limited to acoustic frequency bands of the DAS recorded signal. In this paper, we demonstrate some examples of using the low-frequency band of Distributed Acoustic Sensing (DAS) signal to constrain hydraulic fracture geometry. DAS data were acquired in both offset horizontal and vertical monitor wells. In horizontal wells, DAS data records formation strain perturbation due to fracture propagation. Events like fracture opening and closing, stress shadow creation and relaxation, ball seat and plug isolation can be clearly identified. In vertical wells, DAS response agrees well with co-located pressure and temperature gauges, and illuminates the vertical extent of hydraulic fractures. DAS data in the low-frequency band is a powerful attribute to monitor small strain and temperature perturbation in or near the monitor wells. With different fibered monitor well design, the far-field fracture length, height, width, and density can be accurately measured using cross-well DAS observations.

    LOW FREQUENCY DAS WELL INTERFERENCE EVALUATION
    4.
    发明申请
    LOW FREQUENCY DAS WELL INTERFERENCE EVALUATION 审中-公开

    公开(公告)号：US20190301276A1

    公开(公告)日：2019-10-03

    申请号：US16365173

    申请日：2019-03-26

    Applicant: CONOCOPHILLIPS COMPANY

    Inventor： Ge JIN ,  Kyle R KRUEGER ,  Baishali ROY

    IPC: E21B47/10 ,  E21B47/06

    Abstract: A method of assessing cross-well interference and/or optimizing hydrocarbon production from a reservoir by obtaining low frequency DAS and DTS data and pressure data from a monitor well, when both the monitor and production well are shut-in, and then variably opening the production well for production, and detecting the temperature and pressure fluctuations that indication cross-well interference, and localizing the interference along the well length based on the low frequency DAS data. This information can be used to optimize well placement, completion plans, fracturing plans, and ultimately optimize production from a given reservoir

    LOW FREQUENCY DISTRIBUTED ACOUSTIC SENSING HYDRAULIC FRACTURE GEOMETRY
    7.
    发明申请
    LOW FREQUENCY DISTRIBUTED ACOUSTIC SENSING HYDRAULIC FRACTURE GEOMETRY 有权

    公开(公告)号：US20230003119A1

    公开(公告)日：2023-01-05

    申请号：US17741197

    申请日：2022-05-10

    Applicant: CONOCOPHILLIPS COMPANY

    Inventor： Ge JIN ,  Baishali ROY

    IPC: E21B49/00 ,  E21B43/26 ,  G01V1/42 ,  E21B47/113

    Abstract: Monitoring and diagnosing completion during hydraulic fracturing operations provides insights into the fracture geometry, inter-well frac hits and connectivity. Conventional monitoring methods (microseismic, borehole gauges, tracers, etc.) can provide a range of information about the stimulated rock volume but may often be limited in detail or clouded by uncertainty. Utilization of DAS as a fracture monitoring tool is growing, however most of the applications have been limited to acoustic frequency bands of the DAS recorded signal. In this paper, we demonstrate some examples of using the low-frequency band of Distributed Acoustic Sensing (DAS) signal to constrain hydraulic fracture geometry. DAS data were acquired in both offset horizontal and vertical monitor wells. In horizontal wells, DAS data records formation strain perturbation due to fracture propagation. Events like fracture opening and closing, stress shadow creation and relaxation, ball seat and plug isolation can be clearly identified. In vertical wells, DAS response agrees well with co-located pressure and temperature gauges, and illuminates the vertical extent of hydraulic fractures. DAS data in the low-frequency band is a powerful attribute to monitor small strain and temperature perturbation in or near the monitor wells. With different fibered monitor well design, the far-field fracture length, height, width, and density can be accurately measured using cross-well DAS observations.

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