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

IPC: G01V1/50 ,  G01V13/00

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。

公开(公告)号：US20250084753A1

公开(公告)日：2025-03-13

申请号：US18580214

申请日：2022-07-20

Applicant: Schlumberger Technology Corporation

Inventor： Smaine Zeroug ,  Sandip Bose

IPC: E21B47/005 ,  G01V1/48

Abstract: Embodiments presented provide for a method for in situ quantification of bonding between a wellbore casing and the surrounding media. Quantification may be established through acoustical sampling of the interface to determine appropriate relationships between the casing and the surrounding media.

公开(公告)号：US20230110473A1

公开(公告)日：2023-04-13

申请号：US18065694

申请日：2022-12-14

Applicant: Schlumberger Technology Corporation

Inventor： Yang Liu ,  Ralph D'Angelo ,  Smaine Zeroug ,  Sandip Bose

IPC: G01V1/44 ,  E21B47/14 ,  E21B49/00 ,  E21B47/005 ,  E21B47/00

Abstract: A method and downhole tool is provided that uses beamforming to localize acoustic energy at a desired zone-of-interest within a wellbore traversing a subterranean formation. The tool has an array of transmitter elements configured to emit guided mode acoustic signals at variable amplitude and variable time delay, which are individually controlled by an amplitude factor and time delay assigned to respective transmitter elements. A set of amplitude factors and time delays can be assigned to the transmitter elements of the transmitter array such that the transmitter elements produce a focused acoustic beam at the desired zone-of-interest by combination of guided mode acoustic signals transmitted by the transmitter elements.

公开(公告)号：US11220897B2

公开(公告)日：2022-01-11

申请号：US17046967

申请日：2019-04-12

Applicant: Schlumberger Technology Corporation

Inventor： Vasileios-Marios Gkortsas ,  Sandip Bose ,  Smaine Zeroug

IPC: E21B47/005 ,  G01V1/50

Abstract: Cement in a wellbore is evaluated by using cement evaluation tools to obtain ultrasonic image information and flexural wave image information. Flexural wave imager waveforms are applied to a trained machine learning system that predicts the presence or lack thereof of a clinging P as a function of depth and azimuth, while the ultrasonic imager impedance maps are applied to a trained machine learning system that identifies galaxy patterns for depths and azimuths, indicating the presence of a third interface echo (TIE) close to the casing. Locations of clinging Ps are compared to locations of galaxy patterns to identify when a TIE could cause a false clinging P determination. Where a disambiguated clinging P is found, contaminated cement is identified that may also locate the top of the cement in the annulus.

公开(公告)号：US20210181366A1

公开(公告)日：2021-06-17

申请号：US16759667

申请日：2018-10-25

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Bo Fan ,  Maja Skataric ,  Sandip Bose ,  Shuchin Aeron ,  Smaine Zeroug

IPC: G01V1/50 ,  G01V1/46 ,  E21B47/005 ,  G06N3/08 ,  G06N3/04 ,  G06N20/10

Abstract: A sonic tool is activated in a well having multiple casings and annuli surrounding the casing. Detected data is preprocessed using slowness time coherence (STC) processing to obtain STC data. The STC data is provided to a machine learning module which has been trained on labeled STC data. The machine learning module provides an answer product regarding the states of the borehole annuli which may be used to make decision regarding remedial action with respect to the borehole casings. The machine learning module may implement a convolutional neural network (CNN), a support vector machine (SVM), or an auto-encoder.

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

IPC: E21B49/00 ,  G06N20/00 ,  G01V1/50 ,  G01V1/44 ,  G06N7/00 ,  E21B47/005

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.

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.

公开(公告)号：US20200049850A1

公开(公告)日：2020-02-13

申请号：US16495408

申请日：2018-03-26

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Yang Liu ,  Ralph D'Angelo ,  Smaine Zeroug ,  Sandip Bose

IPC: G01V1/44 ,  E21B49/00 ,  E21B47/00 ,  E21B47/14

Abstract: A method and downhole tool is provided that uses beamforming to localize acoustic energy at a desired zone-of-interest within a wellbore traversing a subterranean formation. The tool has an array of transmitter elements configured to emit guided mode acoustic signals at variable amplitude and variable time delay, which are individually controlled by an amplitude factor and time delay assigned to respective transmitter elements. A set of amplitude factors and time delays can be assigned to the transmitter elements of the transmitter array such that the transmitter elements produce a focused acoustic beam at the desired zone-of-interest by combination of guided mode acoustic signals transmitted by the transmitter elements.

公开(公告)号：US09732607B2

公开(公告)日：2017-08-15

申请号：US14462336

申请日：2014-08-18

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Smaine Zeroug ,  Jiaqi Yang ,  Sandip Bose

IPC: G01V1/50 ,  E21B47/09 ,  E21B47/00

CPC classification number: E21B47/091 ,  E21B47/0005 ,  G01V1/50

Abstract: Apparatus and methods are provided. An ultrasonic tool with an array of axially spaced receivers and a transmitter is located in a borehole and is activated. Ultrasonic waveform indications recorded by the receivers are processed and analyzed to determine the presence of non-dispersive headwave signatures. If a non-dispersive headwave signature is located, the presence of a solid such as cement in the annulus is confirmed, and one or more of the compressional and shear velocities of the cement can be determined. If only casing dispersive mode signatures are found, the annulus is determined to possibly contain no cement at the location of interest and additional processing is required.

公开(公告)号：US20160109604A1

公开(公告)日：2016-04-21

申请号：US14887653

申请日：2015-10-20

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Smaine Zeroug ,  Jiaqi Yang ,  Sandip Bose

IPC: G01V1/50 ,  G01V13/00

CPC classification number: G01V1/50 ,  E21B47/0005

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. A specular reflection signal may also be estimated based on the acoustic data. A modeled waveform may be generated using the estimated specular reflection signal and one or more model parameters, such as an estimated crude casing thickness, an estimated tool position, an estimated sound velocity of mud between the acoustic logging tool and the casing, an estimated impedance of the annular fill material, and an estimated impedance of the mud. The modeled waveform may be calibrated in some embodiments. Furthermore, a casing thickness may be estimated by matching the modeled waveform with the corresponding measured acoustic data. The techniques may output one or more of a thickness of the casing, an apparent impedance of the annular fill material, and the 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。 也可以基于声学数据来估计镜面反射信号。 可以使用估计的镜面反射信号和一个或多个模型参数来产生建模的波形，例如估计的粗壳体厚度，估计的工具位置，声学测井工具和壳体之间的泥浆的估计声速，估计阻抗 的环状填充材料，以及泥浆的估计阻抗。 在一些实施例中可以校准建模的波形。 此外，可以通过将建模的波形与相应的测量的声学数据相匹配来估计外壳厚度。 这些技术可以输出壳体的厚度，环形填充材料的表观阻抗和泥浆的阻抗中的一个或多个。