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公开(公告)号：US10858933B2
公开(公告)日：2020-12-08
申请号：US15575024
申请日：2016-05-18
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Sandip Bose , Maja Skataric , Smaine Zeroug , Bikash Kumar Sinha
Abstract: The present disclosure provides methods and systems for analyzing cement integrity in a depth interval of a wellbore having a multiple string casing with an innermost annulus disposed inside at least one outer annulus. The method includes processing ultrasonic data obtained from ultrasonic measurements on the interval of the wellbore to determine properties of the innermost annulus. The method also includes processing sonic data obtained from sonic measurements on the interval of the wellbore to extract features of the sonic data. The features of the sonic data are input to a machine learning processing to determine properties of both the innermost annulus and the least one outer annulus. Additional processing of ultrasonic and sonic data can also be used to determine properties of both the innermost annulus and the least one outer annulus. These properties can be used to analyze cement integrity in the depth interval of the wellbore.
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公开(公告)号：US10809405B2
公开(公告)日：2020-10-20
申请号：US15742373
申请日：2016-07-05
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Smaine Zeroug , Bikash Kumar Sinha , Peter Tilke , George Alan Waters
IPC: G01V1/46 , G01V1/48 , G01V1/52 , E21B47/005 , E21B47/085
Abstract: Methods utilizing ultrasonic acoustic logging tools are provided for detecting thin formation layers that present markedly higher compliance than that of the surrounding rock in, for example, a laminated tight hydrocarbon-bearing formation. These layers may be interpreted as presenting potential interfacial and planes of weakness that may have bearing on the extent of a hydraulic fracture propagating across them.
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公开(公告)号：US20190129053A1
公开(公告)日：2019-05-02
申请号：US16093640
申请日：2017-04-13
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Pu Wang , Sandip Bose , Bikash Kumar Sinha , Ting Lei
IPC: G01V1/50
Abstract: Methods are provided for determining properties of an anisotropic formation (including both fast and slow formations) surrounding a borehole. A logging-while-drilling tool is provided that is moveable through the borehole. The logging-while drilling tool has at least one dipole acoustic source spaced from an array of receivers. During movement of the logging-while-drilling tool, the at least one dipole acoustic source is operated to excite a time-varying pressure field in the anisotropic formation surrounding the borehole. The array of receivers is used to measure waveforms arising from the time-varying pressure field in the anisotropic formation surrounding the borehole. The waveforms are processed to determine a parameter value that represents shear directionality of the anisotropic formation surrounding the borehole.
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公开(公告)号：US11835673B2
公开(公告)日：2023-12-05
申请号：US17473555
申请日：2021-09-13
Applicant: Schlumberger Technology Corporation
Inventor： Pu Wang , Sandip Bose , Bikash Kumar Sinha , Ting Lei
CPC classification number: G01V1/50 , G01V1/284 , G01V2200/16 , G01V2210/47 , G01V2210/626
Abstract: Methods are provided for determining properties of an anisotropic formation (including both fast and slow formations) surrounding a borehole. A logging-while-drilling tool is provided that is moveable through the borehole. The logging-while drilling tool has at least one dipole acoustic source spaced from an array of receivers. During movement of the logging-while-drilling tool, the at least one dipole acoustic source is operated to excite a time-varying pressure field in the anisotropic formation surrounding the borehole. The array of receivers is used to measure waveforms arising from the time-varying pressure field in the anisotropic formation surrounding the borehole. The waveforms are processed to determine a parameter value that represents shear directionality of the anisotropic formation surrounding the borehole.
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公开(公告)号：US20220075087A1
公开(公告)日：2022-03-10
申请号：US17473555
申请日：2021-09-13
Applicant: Schlumberger Technology Corporation
Inventor： Pu Wang , Sandip Bose , Bikash Kumar Sinha , Ting Lei
Abstract: Methods are provided for determining properties of an anisotropic formation (including both fast and slow formations) surrounding a borehole. A logging-while-drilling tool is provided that is moveable through the borehole. The logging-while drilling tool has at least one dipole acoustic source spaced from an array of receivers. During movement of the logging-while-drilling tool, the at least one dipole acoustic source is operated to excite a time-varying pressure field in the anisotropic formation surrounding the borehole. The array of receivers is used to measure waveforms arising from the time-varying pressure field in the anisotropic formation surrounding the borehole. The waveforms are processed to determine a parameter value that represents shear directionality of the anisotropic formation surrounding the borehole.
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Patent Agency Ranking
公开(公告)号：US10890681B2
公开(公告)日：2021-01-12
申请号：US15575168
申请日：2016-05-18
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Ting Lei , Bikash Kumar Sinha , Smaine Zeroug
IPC: G01V1/50 , E21B47/005 , G01N29/44 , E21B33/14
Abstract: Methods and systems are provided for determining cement quality in an outer annulus of a multi-string cased wellbore having an inner annulus of mud. Data from a sonic logging tool is processed to obtain a slowness dispersion. The slowness dispersion is compared to a plurality of model slowness dispersions generated for a plurality of different values for cement quality in the outer annulus. The cement quality in the outer annulus is determined based on the comparison.
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公开(公告)号：US20190055830A1
公开(公告)日：2019-02-21
申请号：US16080104
申请日：2017-03-02
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Maja Skataric , Sandip Bose , Smaine Zeroug , Bikash Kumar Sinha , Ram Sunder Kalyanraman , Erik Wielemaker
Abstract: Methods arc provided for using sonic tool data to investigate a multi-string wcllbore. The sonic data is processed to obtain indications of phase slowness dispersions for multiple locations in the wellbore. The dispersions are aggregated. The aggregated dispersions are compared with a plurality of cut-off mode templates to identify the presence of cut-off modes or the lack thereof in the aggregated phase slowness dispersions. Features of the multi-string wellbore are identified based on the presence of the cut-off modes or the lack thereof. In another method, the sonic data is processed to obtain indications as a function of depth of at least one of an energy spectrum, a semblance projection, a slowness dispersion projection, an attenuation dispersion projection, and a wavenumber dispersion projection. The indications are inspected to locate a shift at a particular depth indicat- ing a transition in at least oneannulus of the multi-string wellbore.
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公开(公告)号：US11624849B2
公开(公告)日：2023-04-11
申请号：US15978972
申请日：2018-05-14
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Austin Boyd , Vanessa Simoes , Bikash Kumar Sinha , Smaine Zeroug , Anna Paula Lougon Duarte
IPC: G01V1/30
Abstract: A method for estimating all five transversely-isotropic (TI)-elastic constants using borehole sonic data obtained from at least one subterranean borehole in a transversely isotropic formation. In an embodiment, the method includes: solving for a quasi-compressional qP-wave velocity VqP using inversion algorithms based on exact solutions of the Kelvin-Christoffel equations for plane wave velocities in arbitrarily anisotropic formations, where the five TI-elastic constants may include C11, C13, C33, C55, and C66.
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公开(公告)号：US11119237B2
公开(公告)日：2021-09-14
申请号：US16093640
申请日：2017-04-13
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Pu Wang , Sandip Bose , Bikash Kumar Sinha , Ting Lei
Abstract: Methods are provided for determining properties of an anisotropic formation (including both fast and slow formations) surrounding a borehole. A logging-while-drilling tool is provided that is moveable through the borehole. The logging-while drilling tool has at least one dipole acoustic source spaced from an array of receivers. During movement of the logging-while-drilling tool, the at least one dipole acoustic source is operated to excite a time-varying pressure field in the anisotropic formation surrounding the borehole. The array of receivers is used to measure waveforms arising from the time-varying pressure field in the anisotropic formation surrounding the borehole. The waveforms are processed to determine a parameter value that represents shear directionality of the anisotropic formation surrounding the borehole.
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公开(公告)号：US11015443B2
公开(公告)日：2021-05-25
申请号：US16306688
申请日：2017-05-31
Applicant: Schlumberger Technology Corporation
Inventor： Ting Lei , Smaine Zeroug , Bikash Kumar Sinha
Abstract: Methods and systems are provided that identify relatively large anisotropic horizontal stresses in a formation based on (i) azimuthal variations in the compressional and shear slownesses or velocities of the formation measured from ultrasonic data acquired by at least one acoustic logging tool as well as (ii) cross-dipole dispersions of the formation measured from sonic data acquired by the at least one acoustic logging tool. In addition, the azimuthal variations in the compressional and shear slownesses or velocities of the formation and dipole flexural dispersions of the formation can be jointly inverted to obtain the elastic properties of the rock of the formation in terms of linear and nonlinear constants and the magnitude of maximum horizontal stress of the formation. A workflow for estimating the magnitude of the maximum horizontal stress can employ estimates of certain formation properties, such as overburden stress, magnitude of minimum horizontal stress, and pore pressure.
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