公开(公告)号：US09534487B2

公开(公告)日：2017-01-03

申请号：US14157359

申请日：2014-01-16

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Smaine Zeroug ,  Jiaqi Yang ,  Sandip Bose

IPC: G01V1/50 ,  E21B47/00

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：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。

公开(公告)号：US20150218930A1

公开(公告)日：2015-08-06

申请号：US14612101

申请日：2015-02-02

Applicant: Schlumberger Technology Corporation

Inventor： Smaine Zeroug ,  Jiaqi Yang ,  Sandip Bose

IPC: E21B47/00 ,  G01V1/48

CPC classification number: G01V1/50 ,  E21B47/0005 ,  E21B47/14

Abstract: Embodiments of the disclosure may include systems and methods for estimating an acoustic property of an annulus in a cement evaluation system. In one embodiment, a casing arrival signal is acquired at acoustic receivers a cement evaluation tool. A spectral amplitude ratio is calculated based on the casing arrival signal. The spectral amplitude ratio is scanned to detect and identify discontinuities. If discontinuities are detected, the frequency at the discontinuity may be used to estimate a wavespeed of the annulus. If discontinuities are not detected, attenuation dispersions are calculated and estimated, and an estimated wavespeed and parameters are updated until the calculated and estimated attenuation dispersions match.

Abstract translation: 本公开的实施例可以包括用于估计水泥评估系统中的环的声学特性的系统和方法。 在一个实施例中，在声学接收器处获取水泥评估工具的套管到达信号。 基于壳体到达信号计算频谱振幅比。 扫描光谱振幅比以检测和识别不连续性。 如果检测到不连续性，则可以使用不连续处的频率来估计环带的波速。 如果不检测到不连续性，则计算和估计衰减分散，并且估计的波速和参数被更新，直到计算和估计的衰减色散匹配。