公开(公告)号：US10577915B2

公开(公告)日：2020-03-03

申请号：US14157391

申请日：2014-01-16

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Bikash K. Sinha ,  Ting Lei ,  Smaine Zeroug

IPC: E21B47/00 ,  E21B47/10 ,  G01V1/44

Abstract: Methods are disclosed for detecting fluid in at least one annulus around at least one casing installed in a borehole traversing a formation utilizing a sonic tool. The sonic tool is activated in the borehole and the received sonic waveforms are processed to obtain a dispersion plot. A reference dispersion plot is generated using a model of the borehole where the casing is well-bonded by cement. The obtained and reference dispersion plots are compared. An indication of fluid and in some cases, the specific radial location thereof is obtained based on the signature of the obtained plot as opposed to the reference plot. The methods are effective in doubly-cased boreholes using monopole and/or dipole sources.

公开(公告)号：US10355664B2

公开(公告)日：2019-07-16

申请号：US14904317

申请日：2014-07-10

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Mihir S. Patel ,  Bikash K. Sinha ,  Tsutomu Yamate

IPC: G01K7/32 ,  G01L9/00 ,  H03B5/32 ,  H03H9/02 ,  H03H9/13 ,  H03H9/17 ,  G01K11/26 ,  H01L41/08

Abstract: Oscillators that use resonator elements formed from langasite or one of its isomorphs are described herein. The resonator elements include crystal orientations that are stress and/or temperature compensated. The resonators vibrate at an oscillating frequency in a thickness-shear mode of vibration. The oscillating frequency can be used to derive temperature, derive pressure, and/or for frequency control applications.

公开(公告)号：US09891334B2

公开(公告)日：2018-02-13

申请号：US14246144

申请日：2014-04-07

Applicant: Schlumberger Technology Corporation

Inventor： Bikash K. Sinha ,  Ting Lei

IPC: H04K3/00 ,  G01V1/50 ,  G01V1/44

CPC classification number: G01V1/50 ,  G01V1/44

Abstract: A technique facilitates determination of fracture attributes through the recording and analyzing of borehole sonic data before and after a fracturing operation. The technique comprises generating broadband acoustic waves at an array of receivers based on output from a plurality of acoustic sources. The waveforms of the broadband acoustic waves are recorded and processed to estimate sonic signatures. The sonic signatures are then used to determine fracture attributes. In some applications, the data may be used to determine whether the fractures in the formation are filled with fluid or soft sediments. Information on the fracture attributes is output to a suitable system, e.g. a computer display.

公开(公告)号：US20170371072A1

公开(公告)日：2017-12-28

申请号：US15544187

申请日：2016-01-25

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Sushil Shetty ,  Lin Liang ,  Tarek M. Habashy ,  Vanessa Simoes ,  Austin Boyd ,  Bikash K. Sinha ,  Smaine Zeroug

IPC: G01V99/00 ,  G01N15/08 ,  G01V11/00

CPC classification number: G01V99/005 ,  G01N15/088 ,  G01V11/00 ,  G01V2210/1429 ,  G01V2210/622

Abstract: A method for determining properties of a formation traversed by a well or wellbore employs measured sonic data, resistivity data, and density data for an interval-of-interest within the well or wellbore. A formation model that describe properties of the formation at the interval-of-interest is derived from the measured sonic data, resistivity data, and density data for the interval-of-interest. The formation model is used to derive simulated sonic data, resistivity data, and density data for the interval-of-interest. The measured sonic data, resistivity data, and density data for the interval-of-interest and the simulated sonic data, resistivity data, and density data for the interval-of-interest are used to refine the formation model and determine properties of the formation at the interval-of-interest. The properties of the formation may be a radial profile for porosity, a radial profile for water saturation, a radial profile for gas saturation, a radial profile of oil saturation, and a radial profile for pore aspect ratio.

公开(公告)号：US20150285936A1

公开(公告)日：2015-10-08

申请号：US14246144

申请日：2014-04-07

Applicant: Schlumberger Technology Corporation

Inventor： Bikash K. Sinha ,  Ting Lei

IPC: G01V1/50

CPC classification number: G01V1/50 ,  G01V1/44

Abstract: A technique facilitates determination of fracture attributes through the recording and analyzing of borehole sonic data before and after a fracturing operation. The technique comprises generating broadband acoustic waves at an array of receivers based on output from a plurality of acoustic sources. The waveforms of the broadband acoustic waves are recorded and processed to estimate sonic signatures. The sonic signatures are then used to determine fracture attributes. In some applications, the data may be used to determine whether the fractures in the formation are filled with fluid or soft sediments. Information on the fracture attributes is output to a suitable system, e.g. a computer display.

Abstract translation: 一种技术有助于通过记录和分析压裂作业前后的井眼声波数据来确定断裂属性。 该技术包括基于来自多个声源的输出在接收器阵列处产生宽带声波。 记录和处理宽带声波的波形以估计声音签名。 然后使用声波特征来确定断裂属性。 在一些应用中，数据可用于确定地层中的裂缝是否充满流体或软沉积物。 关于断裂属性的信息被输出到合适的系统，例如。 一台电脑显示器。

公开(公告)号：US20150029823A1

公开(公告)日：2015-01-29

申请号：US13949202

申请日：2013-07-23

Applicant: Schlumberger Technology Corporation

Inventor： Jiaqi Yang ,  Bikash K. Sinha ,  Ting Lei

IPC: G01V1/40

CPC classification number: G01V1/40 ,  G01V1/48 ,  G01V1/50 ,  G01V2210/612 ,  G01V2210/6169

Abstract: Systems and methods for identifying sanding in production wells using time-lapse sonic data. Formation anisotropy can be characterized in terms of shear moduli in a vertical wellbore, e.g., vertical shear moduli C44 and C55 in the wellbore axial planes and horizontal shear modulus C66 in the wellbore cross-sectional plane. Changes in formation anisotropy between different times can provide qualitative indicators of the occurrence of sanding in the production well. Before production begins, the horizontal shear modulus C66 is typically less than the vertical shear modulus C44 or C55 or both. At a subsequent time after sanding occurs, the horizontal shear modulus C66 is typically greater than the vertical shear modulus C44 or C55 or both. By comparing the shear moduli of the vertical wellbore at different times, it is possible to identify the occurrence of sanding in the production well using time-lapse sonic data.

Abstract translation: 使用延时声波数据识别生产井中的砂光的系统和方法。 形成各向异性可以用垂直井筒中的剪切模量来表征，例如井筒轴向平面中的垂直剪切模量C44和C55以及井筒横截面中的水平剪切模量C66。 不同时期地层各向异性的变化可以为生产井中砂磨发生提供定性指标。 在生产开始之前，水平剪切模量C66通常小于垂直剪切模量C44或C55或两者。 在砂光发生后的随后时间，水平剪切模量C66通常大于垂直剪切模量C44或C55或两者。 通过比较不同时间垂直井筒的剪切模量，可以使用延时声波数据来识别生产井中砂磨的发生。

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

IPC: G01V1/50 ,  G01V1/40 ,  E21B47/00

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.

公开(公告)号：US10054708B2

公开(公告)日：2018-08-21

申请号：US14728357

申请日：2015-06-02

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Bikash K. Sinha

IPC: G01V1/50 ,  G01V1/44 ,  E21B49/00 ,  G01V1/28

CPC classification number: G01V1/50 ,  E21B49/006 ,  G01V1/284 ,  G01V1/44 ,  G01V2210/62

Abstract: Maximum and minimum horizontal stresses, and horizontal to overburden stress ratio, are estimated using radial profiles of shear moduli. Inversion enables estimation of maximum and minimum horizontal stresses using radial profiles of three shear moduli associated with an orthogonal set of axes defined by the three principal stress directions. Differences in the far-field shear moduli are inverted together with two difference equations obtained from the radial profiles of the dipole shear moduli C44 and C55, and borehole stresses in the near-wellbore region. The horizontal to overburden stress ratio is estimated using differences in the compressional, dipole shear, and Stoneley shear slownesses at two depths in the same lithology interval where the formation exhibits azimuthal isotropy in cross-dipole dispersions, implying that horizontal stresses are nearly the same at all azimuths. The overburden to horizontal stress ratio in a formation with axial heterogeneity may also be estimated using the far-field Stoneley shear modulus C66 and dipole shear modulus C55 together with the radial variation of the dipole shear modulus C55 caused by near-wellbore stress concentrations.

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

IPC: G01V1/50 ,  E21B47/00

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。

公开(公告)号：US09417352B2

公开(公告)日：2016-08-16

申请号：US13916542

申请日：2013-06-12

Applicant: Schlumberger Technology Corporation

Inventor： Bikash K. Sinha

IPC: G01V1/50

CPC classification number: G01V1/50 ,  G01V2210/6242

Abstract: Systems and methods for the estimating a plurality of anisotropic elastic constants (Cij) using borehole dispersions and refracted compressional headwave velocity at a single logging depth in a vertical, deviated, or horizontal wellbore in a transversely-isotropic with a vertical axis of symmetry (“TIV”) formation. The estimated elastic constants can then be used to calculate near-wellbore stress distributions in the wellbore, which aids in an optimal completion design, such as for shale-gas production in the presence of shale heterogeneity.

Abstract translation: 用于使用钻孔分散和垂直，偏斜或水平井筒中的单个测井深度处的折射压缩波头波速度估计多个各向异性弹性常数（Cij）的系统和方法，其垂直对称轴（“ TIV“）形成。 估计的弹性常数可以用于计算井眼中的近井筒应力分布，这有助于最佳的完井设计，例如在页岩异质性的情况下生产页岩气。