公开(公告)号：US20160047238A1

公开(公告)日：2016-02-18

申请号：US14462336

申请日：2014-08-18

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： SMAINE ZEROUG ,  JIAQI YANG ,  SANDIP BOSE

IPC: E21B49/00

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.

Abstract translation: 提供了装置和方法。 具有轴向间隔开的接收器和发射器的阵列的超声波工具位于钻孔中并被激活。 由接收机记录的超声波波形指示进行处理和分析，以确定是否存在非分散头波标记。 如果确定了非分散头波签名，则确定在环形空间中存在诸如水泥的固体，并且可以确定水泥的一个或多个压缩和剪切速度。 如果仅发现套管分散模式签名，则确定环在可能不包含感兴趣位置的水泥并需要附加处理。

公开(公告)号：US20160356910A1

公开(公告)日：2016-12-08

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 ,  E21B47/00

CPC classification number: G01V1/50 ,  E21B47/0005 ,  G01V1/40

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：US20140192619A1

公开(公告)日：2014-07-10

申请号：US13734728

申请日：2013-01-04

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： BIKESH K. SINHA ,  SANDIP BOSE ,  JIAQI YANG ,  TING LEI ,  TAREK M. HABASHY ,  SMAINE ZEROUG ,  MA LUO

IPC: G01V1/50

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：US20150198732A1

公开(公告)日：2015-07-16

申请号：US14157359

申请日：2014-01-16

Applicant: Schlumberger Technology Corporation

Inventor： SMAINE ZEROUG ,  JIAQI YANG ,  SANDIP BOSE

IPC: G01V1/50

CPC classification number: E21B47/0005 ,  G01V1/50

Abstract: Apparatus and methods for characterizing the physical state of a barrier installed in a borehole traversing a formation including locating an ultrasonic tool with a plurality of spaced receivers and a transmitter at a location in the borehole, activating the ultrasonic tool to form ultrasonic waveforms, wherein the spaced receivers record the ultrasonic waveforms, aligning the transmitter and the spaced receivers, wherein the ultrasonic waveforms comprise propagated Lamb modes, processing the ultrasonic waveforms to obtain a first amplitude dispersion plot of attenuation as a function of frequency and first phase dispersion plot of phase velocity as a function of frequency, processing attenuation dispersions to identify discontinuities, and relating the discontinuities to barrier wavespeeds.

Abstract translation: 用于表征安装在穿过地层的钻孔中的屏障的物理状态的装置和方法，包括将具有多个间隔开的接收器的超声波工具和位于钻孔中的位置的发射器定位，启动超声波工具以形成超声波形，其中 间隔的接收器记录超声波波形，对准发射器和间隔的接收器，其中超声波波形包括传播的兰姆模式，处理超声波波形以获得作为频率的函数的衰减的第一振幅色散图和相速度的第一相位色散图 作为频率的函数，处理衰减分散以识别不连续性，以及将不连续性与屏障波速相关联。

公开(公告)号：US20130114376A1

公开(公告)日：2013-05-09

申请号：US13723080

申请日：2012-12-20

Applicant: Schlumberger Technology Corporation

Inventor： SHUCHIN AERON ,  SANDIP BOSE ,  HENRI-PIERRE VALERO ,  VENKATESH SALIGRAMA

IPC: G01V1/50

CPC classification number: G01V1/50 ,  G01V1/30 ,  G01V1/307 ,  G01V2210/00

Abstract: Slowness dispersion characteristics of multiple possibly interfering signals in broadband acoustic waves as received by an array of two or more sensors are extracted without using a physical model. The problem of dispersion extraction is mapped to the problem of reconstructing signals having a sparse representation in an appropriately chosen over-complete dictionary of basis elements. A sparsity penalized signal reconstruction algorithm is described where the sparsity constraints are implemented by imposing a l1 norm type penalty. The candidate modes that are extracted are consolidated by means of a clustering algorithm to extract phase and group slowness estimates at a number of frequencies which are then used to reconstruct the desired dispersion curves. These estimates can be further refined by building time domain propagators when signals are known to be time compact, such as by using the continuous wavelet transform.

Abstract translation: 在不使用物理模型的情况下提取由两个或更多个传感器的阵列接收的宽带声波中的多个可能干扰信号的慢度色散特性。 色散提取的问题被映射到在基本元素的适当选择的过完整字典中重建具有稀疏表示的信号的问题。 描述了稀疏惩罚信号重建算法，其中稀疏约束通过施加l1范数类型惩罚来实现。 提取的候选模式通过聚类算法进行合并，以提取多个频率的相位和组慢度估计，然后用于重建所需的色散曲线。 当已知信号是时间紧凑的，例如通过使用连续小波变换，可以通过构建时域传播器来进一步改进这些估计。