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公开(公告)号：US10809400B2
公开(公告)日：2020-10-20
申请号：US15331958
申请日：2016-10-24
Applicant: Schlumberger Technology Corporation
Inventor： Pu Wang , Sandip Bose , Bikash Sinha
Abstract: A technique includes receiving data acquired by an acoustic measurement tool in a well, where the data represents multiple acoustic modes, including a first order formation flexural acoustic mode and a higher order formation flexural acoustic mode. The technique includes processing the data to identify the higher order formation flexural acoustic mode; and determining a shear slowness based at least in part on slowness values that are associated with the identified higher order formation flexural acoustic mode.
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公开(公告)号：US10393905B2
公开(公告)日：2019-08-27
申请号：US15238524
申请日：2016-08-16
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Bikash K. Sinha , Sandip Bose , Jiaqi Yang , Ting Lei , Tarek M. Habashy , Smaine Zeroug , Ma Luo
Abstract: A method for torsional wave logging in a borehole of a subterranean formation. The method includes obtaining a torsional wave measurement of the borehole, wherein the torsional wave measurement represents characteristics of a torsional wave propagating within a cylindrical layered structure associated with the borehole, wherein the cylindrical layered structure comprises the subterranean formation and a completion of the borehole, analyzing, by a computer processor, the torsional wave measurement to generate a quality measure of the completion, and displaying the quality measure of the completion.
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公开(公告)号：US10012749B2
公开(公告)日：2018-07-03
申请号：US14887746
申请日：2015-10-20
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Sandip Bose , Smaine Zeroug , Jiaqi Yang
CPC classification number: G01V1/50 , E21B47/0005 , G01V1/306
Abstract: Techniques involve obtaining acoustic data from an acoustic logging tool, where the acoustic data includes waves reflected from the casing, the annular fill material, the formation, and/or interfaces between any of the casing, the annular fill material, and the formation. A crude casing thickness, tool position (e.g., eccentering), mud sound velocity may be estimated using the acoustic data. Techniques also involve computing a model spectra and an estimated casing thickness using a forward model and based on a crude casing thickness, an initial mud acoustic impedance, and an initial annular acoustic impedance, estimating a specular signal using the model spectra and the acoustic data in a first time window, computing a calibrated model signal using the estimated specular signal and computed model spectra, computing a misfit of the computed calibrated model signal and acoustic data in a second time window comprising the initial time window, and computing a correction update to one or more of the estimated casing thickness an estimated apparent annular acoustic impedance and an estimated mud acoustic impedance, based on the misfit. Techniques involve iteratively estimating the model spectra and the Jacobian curve, computing the specular signal, computing the misfit, and computing the update until the update is below a threshold. Outputs may include one or more of a casing thickness, an apparent acoustic impedance of the annular fill material, and the acoustic impedance of mud.
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公开(公告)号：US20170168179A1
公开(公告)日：2017-06-15
申请号：US15335797
申请日：2016-10-27
Applicant: Schlumberger Technology Corporation
Inventor： Mikhail Lemarenko , Christoph Klieber , Sylvain Thierry , Sandip Bose , Smaine Zeroug
CPC classification number: G01V1/306 , E21B47/0005 , E21B47/082 , G01V1/282 , G01V1/32 , G01V1/50 , G01V2210/6224 , G01V2210/6226 , G01V2210/677
Abstract: Techniques involve obtaining acoustic data from an acoustic logging tool, where the acoustic data includes waves reflected from the casing, the annular fill material, the formation, and/or interfaces between any of the casing, the annular fill material, one or more interfaces between any of the mud, the casing, and the annular fill material. Techniques include normalizing the acoustic wave to result in a normalized wave having a comparable spectral shape with a reference wave, and comparing the normalized wave with the reference wave. The reference wave may be generated or modeled or produced from a look-up table or database, and may be estimated based on initial estimates of wellbore parameters. Based on the comparison of the normalized wave with the reference wave, a best-fit reference wave substantially matching the normalized wave may be identified. The best-fit reference wave may correspond with a thickness of the casing, an acoustic impedance of the annular fill material, and an acoustic impedance of mud.
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公开(公告)号：US09448321B2
公开(公告)日：2016-09-20
申请号：US13734728
申请日：2013-01-04
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Bikash K. Sinha , Sandip Bose , Jiaqi Yang , Ting Lei , Tarek M. Habashy , Smaine Zeroug , Ma Luo
CPC classification number: G01V1/50 , E21B47/0005
Abstract: A method for torsional wave logging in a borehole of a subterranean formation. The method includes obtaining a torsional wave measurement of the borehole, wherein the torsional wave measurement represents characteristics of a torsional wave propagating within a cylindrical layered structure associated with the borehole, wherein the cylindrical layered structure comprises the subterranean formation and a completion of the borehole, analyzing, by a computer processor, the torsional wave measurement to generate a quality measure of the completion, and displaying the quality measure of the completion.
Abstract translation: 一种地下地层井眼扭转波测井方法。 该方法包括获得钻孔的扭转波测量，其中扭转波测量表示在与钻孔相关联的圆柱形分层结构内传播的扭转波的特征，其中圆柱形分层结构包括地层并完成钻孔， 通过计算机处理器分析扭转波测量以产生完成的质量测量，并且显示完成的质量测量。
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Patent Agency Ranking
16.发明申请公开(公告)号：US20160109605A1
公开(公告)日：2016-04-21
申请号：US14887746
申请日：2015-10-20
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Sandip Bose , Smaine Zeroug , Jiaqi Yang
CPC classification number: G01V1/50 , E21B47/0005 , G01V1/306
Abstract: Techniques involve obtaining acoustic data from an acoustic logging tool, where the acoustic data includes waves reflected from the casing, the annular fill material, the formation, and/or interfaces between any of the casing, the annular fill material, and the formation. A crude casing thickness, tool position (e.g., eccentering), mud sound velocity may be estimated using the acoustic data. Techniques also involve computing a model spectra and an estimated casing thickness using a forward model and based on a crude casing thickness, an initial mud acoustic impedance, and an initial annular acoustic impedance, estimating a specular signal using the model spectra and the acoustic data in a first time window, computing a calibrated model signal using the estimated specular signal and computed model spectra, computing a misfit of the computed calibrated model signal and acoustic data in a second time window comprising the initial time window, and computing a correction update to one or more of the estimated casing thickness an estimated apparent annular acoustic impedance and an estimated mud acoustic impedance, based on the misfit. Techniques involve iteratively estimating the model spectra and the Jacobian curve, computing the specular signal, computing the misfit, and computing the update until the update is below a threshold. Outputs may include one or more of a casing thickness, an apparent acoustic impedance of the annular fill material, and the acoustic impedance of mud.
Abstract translation: 技术涉及从声学测井工具获得声学数据，其中声学数据包括从壳体反射的波形，环形填充材料，地层和/或任何壳体，环形填充材料和地层之间的接口。 可以使用声学数据来估计粗糙的外壳厚度，工具位置（例如偏心），泥浆声速。 技术还包括使用正向模型并基于粗壳体厚度，初始泥声阻抗和初始环形声阻抗来计算模型光谱和估计的壳体厚度，使用模型光谱和声学数据估计镜面信号 第一时间窗口，使用估计的镜面反射信号和计算的模型光谱计算校准的模型信号，在包括初始时间窗口的第二时间窗中计算所计算的校准模型信号和声学数据的失配，以及计算校正更新到一个 或更多的估计外壳厚度，基于错配估计的表观环形声阻抗和估计的泥声阻抗。 技术包括迭代地估计模型光谱和雅可比曲线，计算镜面信号，计算误差，以及计算更新直到更新低于阈值。 输出可以包括套管厚度，环形填充材料的表观声阻抗和泥浆的声阻抗中的一个或多个。
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公开(公告)号：US20140125384A1
公开(公告)日：2014-05-08
申请号：US14151813
申请日：2014-01-10
Applicant: Schlumberger Technology Corporation
Inventor： Abderrhamane Ounadjela , Jacques Jundt , Olivier Moyal , Henri-Pierre Valero , Sandip Bose
IPC: H02M3/156
CPC classification number: H02M3/1563 , E21B47/00 , G01V1/159 , G01V1/42 , H04B11/00
Abstract: Systems, methods, and apparatus to drive reactive loads are disclosed. An example apparatus to drive a reactive load includes a reactive component in circuit with the reactive load, a first switching element in circuit with the reactive load to selectively hold the reactive load in a first energy state and to selectively allow the reactive load to change from the first energy state to a second energy state, a second switching element in circuit with the reactive load to selectively hold the reactive load in the second energy state and to selectively allow the reactive load to change from the second energy state to the first energy state, and a controller to detect a current in the reactive load, and to control the first and second switching elements to hold the reactive load in the first or the second energy state when the current traverses a threshold.
Abstract translation: 公开了用于驱动无功负载的系统，方法和装置。 驱动无功负载的示例性装置包括具有无功负载的电路中的无功分量，具有无功负载的电路中的第一开关元件，以选择性地将无功负载保持在第一能量状态并且选择性地允许无功负载从 第一能量状态到第二能量状态，第二开关元件在电路中具有无功负载以选择性地将无功负载保持在第二能量状态，并且选择性地允许无功负载从第二能量状态改变到第一能量状态 以及控制器，用于检测无功负载中的电流，并且当电流横穿阈值时，控制第一和第二开关元件将无功负载保持在第一或第二能量状态。
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18.发明公开公开(公告)号：US20230349881A1
公开(公告)日：2023-11-02
申请号：US18043616
申请日：2021-09-02
Applicant: Schlumberger Technology Corporation
Inventor： Melanie Jensen , Lalitha Venkataramanan , Sandip Bose , Peter Tilke , Oliver C. Mullins , Li Chen , Denise E. Freed
CPC classification number: G01N33/2823 , E21B49/081
Abstract: Processes and systems for determining asphaltene equilibrium between two or more downhole geographic locations are provided. In some embodiments, the process can include measuring one or more fluid properties of a plurality of fluid samples at varying downhole depths to generate a one or more downhole fluid analysis measurement data points; selecting an asphaltene diameter distribution based on prior knowledge; utilizing the asphaltene diameter distribution to fit a first set of one or more equation of state curves to the one or more downhole fluid analysis measurement data points to define a first model of fitted equation of state curves and to determine one or more posterior distributions of asphaltene diameters; and determining if the varying downhole depths are in an asphaltene equilibrium by determining whether the one or more posterior distributions of asphaltene diameters is consistent with that of asphaltenes in equilibrium.
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公开(公告)号：US11536868B2
公开(公告)日：2022-12-27
申请号：US16972651
申请日：2019-06-07
Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
Inventor： Lingchen Zhu , Sandip Bose , Smaine Zeroug
IPC: G01V1/48 , E21B47/005
Abstract: A method, computer program product, and computing system are provided for receiving sonic data associated with an inner casing of a well. Predicted ultrasonic data associated with an outer casing of the well may be generated based upon, at least in part, a nonlinear regression model and the received sonic data associated with the inner casing of the well.
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公开(公告)号：US20210389487A1
公开(公告)日：2021-12-16
申请号：US17445956
申请日：2021-08-26
Applicant: Schlumberger Technology Corporation
Inventor： Pu Wang , Sandip Bose , Bikash K. Sinha
Abstract: A method for determining a shear slowness of a subterranean formation includes receiving waveforms data acquired by receivers in an acoustic measurement tool in response to energy emitted by at least one dipole source. The waveforms are processed to extract a formation flexural acoustic mode and a tool flexural acoustic mode. The processing includes transforming the time domain waveforms to frequency domain waveforms, processing the frequency domain waveforms with a Capon algorithm to compute a two-dimensional spectrum over a chosen range of group slowness and phase slowness values; and processing the two-dimensional spectrum to extract the multi-mode slowness dispersion. The method further includes selecting a plurality of slowness-frequency pairs from the formation flexural mode of the extracted multi-mode dispersion wherein each slowness-frequency pair comprises a slowness value at a corresponding frequency and processing the selected slowness frequency pairs to compute the shear slowness of the subterranean formation.
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