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公开(公告)号：US07392135B2
公开(公告)日：2008-06-24
申请号：US11323674
申请日：2005-12-30
申请人： Georgios L. Varsamis , Joakim Oscar Blanch , Arthur C. H. Cheng , Calvin Wisner Kessler , Denis Schmitt , Batakrishna Mandal
发明人： Georgios L. Varsamis , Joakim Oscar Blanch , Arthur C. H. Cheng , Calvin Wisner Kessler , Denis Schmitt , Batakrishna Mandal
IPC分类号： G01R29/00
CPC分类号： G01V1/44
摘要： Methods and apparatus are provided for reducing and/or substantially eliminating sensitivity mismatch of acoustic receivers used with acoustic sources to determine acoustic properties of geologic formations as a logging tool traverses the formations. Methods are directed to detecting waveform arrival times at receivers, determining places in a well where arrival times of waves are substantially the same at a plurality of receivers, and estimating effective receiver sensitivities and equalization factors using Stoneley wave amplitudes and windowed deconvolution of Stoneley waves. Methods are further directed to correcting wave amplitudes using estimated effective receiver sensitivities and equalization factors for receivers.
摘要翻译： 提供了用于减少和/或基本上消除与声源一起使用的声接收机的灵敏度失配的方法和装置，以便在测井工具穿过地层时确定地质构造的声学特性。 方法涉及检测接收器处的波形到达时间，确定在多个接收机中波的到达时间基本相同的阱中的位置，以及使用斯通利波斯的斯通利波幅度和窗口去卷积来估计有效的接收机灵敏度和均衡因子。 方法还涉及使用估计的有效接收机灵敏度和接收机的均衡因子校正波幅度。
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公开(公告)号：US07089119B2
公开(公告)日：2006-08-08
申请号：US11103393
申请日：2005-04-11
申请人： Batakrishna Mandal
发明人： Batakrishna Mandal
CPC分类号： G01V1/48
摘要： A system and method is provided for characterizing earth formations. In one embodiment, the method includes passing a logging tool through a borehole and repeatedly: (a) triggering an acoustic wave generator; (b) recording acoustic waveforms received by receivers in the logging tool; (c) determining a time semblance of the recorded acoustic waveforms; and (d) smoothing the time semblance. In a different embodiment, a phase semblance of the recorded acoustic waveforms is determined and smoothed. The smoothing may be performed using an adaptive wavelet denoising technique or an adaptive moving average filter technique. In each case the average time or frequency spacing between semblance peaks is preferably determined and used to adapt the smoothing operation in a manner that varies with the slowness value s.
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公开(公告)号：US20060039238A1
公开(公告)日：2006-02-23
申请号：US10923429
申请日：2004-08-20
IPC分类号： G01V1/00
CPC分类号： G01V1/48
摘要： In some embodiments, an apparatus and a system, as well as a method and an article, may include generating attenuation values associated with a set of multiple signals received by multiple receivers from a transmitted signal as a function of reception time and material velocity. The attenuation values may be stored in a memory and/or displayed on a display, perhaps in conjunction with a semblance map.
摘要翻译： 在一些实施例中，设备和系统以及方法和物品可以包括生成与多个接收器从发射信号接收的多个信号的集合相关联的衰减值作为接收时间和材料速度的函数。 衰减值可以存储在存储器中和/或显示在显示器上，或许与外形图相结合。
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公开(公告)号：US06907349B2
公开(公告)日：2005-06-14
申请号：US10827776
申请日：2004-04-20
申请人： Batakrishna Mandal
发明人： Batakrishna Mandal
CPC分类号： G01V1/48
摘要： A system and method is provided for characterizing earth formations. In one embodiment, the method includes passing a logging tool through a borehole and repeatedly: (a) triggering an acoustic wave generator; (b) recording acoustic waveforms received by receivers in the logging tool; (c) determining a time semblance of the recorded acoustic waveforms; and (d) smoothing the time semblance. In a different embodiment, a phase semblance of the recorded acoustic waveforms is determined and smoothed. The smoothing may be performed using an adaptive wavelet denoising technique or an adaptive moving average filter technique. In each case the average time or frequency spacing between semblance peaks is preferably determined and used to adapt the smoothing operation in a manner that varies with the slowness value s.
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公开(公告)号：US06661737B2
公开(公告)日：2003-12-09
申请号：US10038733
申请日：2002-01-02
IPC分类号： G01V140
摘要： An acoustic tool that provides a programmable source waveform is disclosed. Numerous advantages may be achieved from the configurability of the source waveform. Notably, acoustic logs at multiple frequencies may be acquired with a single pass. The waveform may be frequency-adapted to maximize formation response and amplitude adapted for gain control. In one embodiment, the acoustic tool comprises: a controller, a digital-to-analog controller (DAC), an acoustic transducer, and a linear driver. The DAC converts a digital waveform from the controller into an analog waveform. The acoustic transducer converts an electrical signal into an acoustic signal. The linear driver receives the analog waveform from the DAC and responsively provides the electrical signal to the acoustic transducer. The electrical signal is proportional to the analog waveform. The tool may further include a memory for storing the digital waveform and/or software for generating the digital waveform.
摘要翻译： 公开了一种提供可编程源波形的声学工具。 可以从源波形的可配置性获得许多优点。 值得注意的是，可以通过单次通过获得多个频率的声学记录。 波形可以是频率适应的，以最大化形成响应和适于增益控制的幅度。 在一个实施例中，声学工具包括：控制器，数模转换器（DAC），声换能器和线性驱动器。 DAC将数字波形从控制器转换为模拟波形。 声换能器将电信号转换成声信号。 线性驱动器从DAC接收模拟波形，并响应于将电信号提供给声学换能器。 电信号与模拟波形成正比。 该工具还可以包括用于存储用于产生数字波形的数字波形和/或软件的存储器。
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公开(公告)号：US06188961B1
公开(公告)日：2001-02-13
申请号：US09283338
申请日：1999-03-31
申请人： Batakrishna Mandal
发明人： Batakrishna Mandal
IPC分类号： G01V150
CPC分类号： G01V1/50
摘要： An apparatus and method for determining fast and slow shear wave velocities and orientations in an anisotropic earth formation that reduces the error and ambiguity in calculating these parameters and eliminates the need for dipole receivers and multiple dipole sources. The apparatus generally includes a single dipole source capable of generating an acoustic signal within a borehole. The acoustic logging tool contains multiple levels of receivers. At each level, four receivers, which may be conventional pressure transducers, receive shear/flexural wave signals which propagate along the borehole earth formation. These receivers measure the pressure fields from the wave signals. A processing device, preferably a UNIX™ based computer, interpolates the measured pressure fields between any two adjacent receivers. The processing device performs cross-component decomposition on the pressure field to determine shear wave orientation and velocity. Using the shear wave orientation and velocity the processing device determines transit time anisotropy, energy anisotropy, and slowness anisotropy.
摘要翻译： 用于确定各向异性地层中的快速和慢速剪切波速度和取向的装置和方法，其减少计算这些参数的误差和模糊性，并且消除对偶极接收器和多偶极子源的需要。 该装置通常包括能够在钻孔内产生声学信号的单个偶极子源。 声学测井工具包含多级接收机。 在每个级别，四个接收器（可以是传统的压力传感器）接收沿井眼地层传播的剪切/弯曲波信号。 这些接收器从波信号测量压力场。 处理装置，优选地基于UNIX TM的计算机，在任何两个相邻的接收器之间内插测量的压力场。 处理装置在压力场上执行交叉分量分解以确定剪切波取向和速度。 使用剪切波方向和速度，处理装置确定传播时间各向异性，能量各向异性和慢度各向异性。
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37.发明授权
公开(公告)号：US6041861A
公开(公告)日：2000-03-28
申请号：US992608
申请日：1997-12-17
CPC分类号： E21B47/0005 , G01H15/00 , G01V1/46 , G01N2291/018 , G01N2291/0231 , G01N2291/2636
摘要： A method and device are disclosed for determining the impedance of the cement bond between a borehole casing and its wellbore. The invention uses a predicted resonance response as a baseline for determining from the observed resonance response the approximate impedance of the cement. Corrections are made to account for various defects in the casing by normalizing the received resonance response.
摘要翻译： 公开了一种用于确定井眼套管与其井眼之间的水泥粘结的阻抗的方法和装置。 本发明使用预测的共振响应作为基准，从观察到的共振响应确定水泥的近似阻抗。 通过归一化接收到的共振响应来校正套管中的各种缺陷。
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38.发明授权Method of controlled pulse driving of a stacked PZT bender bar for dipole acoustic radiation 有权用于偶极声辐射的堆叠PZT弯曲杆的受控脉冲驱动方法公开(公告)号：US09541657B2
公开(公告)日：2017-01-10
申请号：US13821847
申请日：2011-09-09
申请人： Batakrishna Mandal , Chen Li
发明人： Batakrishna Mandal , Chen Li
CPC分类号： G01V1/159 , H01L41/04 , H01L41/042 , H01L41/0933
摘要： A bender bar is presented. The bender bar includes at least two pairs of piezoelectric elements arranged on an inert element to adjust the response frequency of the bender bar. In some embodiments, the piezoelectric elements can be stacked on the inert element. In some embodiments, the piezoelectric elements are symmetrically arranged with respect to the bender bar such that a gap is formed between piezoelectric elements arranged on the inert element.
摘要翻译： 提供一个弯曲酒吧。 弯曲杆包括布置在惰性元件上的至少两对压电元件，以调节弯曲杆的响应频率。 在一些实施例中，压电元件可以堆叠在惰性元件上。 在一些实施例中，压电元件相对于弯曲杆对称布置，使得在布置在惰性元件上的压电元件之间形成间隙。
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公开(公告)号：US20150142320A1
公开(公告)日：2015-05-21
申请号：US14408774
申请日：2012-08-28
摘要： In some embodiments, an apparatus and a system, as well as a method and an article, may operate to receive electromagnetic measurement data characterizing a formation from at least one transmitter-receiver pair. Further activity includes transforming the electromagnetic measurement data into transformed measurement data by computing a wavelet transform over the electromagnetic measurement data to provide wavelet coefficients, removing the wavelet coefficients below a selected threshold to provide remaining coefficients, and synthesizing the transformed measurement data by computing a reverse wavelet transform over a combination of the remaining coefficients. Additional apparatus, systems, and methods are described.
摘要翻译： 在一些实施例中，设备和系统以及方法和物品可以操作以从至少一个发射机 - 接收机对接收表征地层的电磁测量数据。 进一步的活动包括通过计算电磁测量数据上的小波变换来将电磁测量数据变换成变换的测量数据，以提供小波系数，去除低于所选阈值的小波系数以提供剩余系数，以及通过计算反向来合成变换的测量数据 通过剩余系数的组合进行小波变换。 描述了附加装置，系统和方法。
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公开(公告)号：US20140071790A1
公开(公告)日：2014-03-13
申请号：US14036545
申请日：2013-09-25
IPC分类号： G01V1/30
CPC分类号： G01V1/306 , G01N29/11 , G01N29/348 , G01N29/4427 , G01N29/46 , G01N2291/02863 , G01N2291/044 , G01V1/00 , G01V1/40 , G01V2210/542
摘要： An ultrasonic imaging method is provided. A wideband acoustic pulse is fired at a wall. A wideband response signal is received. The wideband response signal is processed to select an impedance measurement frequency. A wavelet having a characteristic frequency approximately equal to the impedance measurement frequency is fired. A wavelet response signal is received. A reflection coefficient is determined from the wavelet response signal. An impedance measurement is calculated from the reflection coefficient. Related tools and systems are also disclosed.
摘要翻译： 提供超声成像方法。 在墙壁上发射一个宽带的声脉冲。 接收宽带响应信号。 处理宽带响应信号以选择阻抗测量频率。 具有大致等于阻抗测量频率的特征频率的小波被点燃。 接收小波响应信号。 根据小波响应信号确定反射系数。 根据反射系数计算阻抗测量值。 还公开了相关的工具和系统。
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