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1.发明授权Method for determining multiple thermal neutron decay components from the capture gamma ray spectrum measured by a pulsed neutron instrument 失效用于通过脉冲中子仪测定的捕获伽马射线谱中的多个热中子衰变分量的方法
公开(公告)号：US5973321A
公开(公告)日：1999-10-26
申请号：US873229
申请日：1997-06-11
申请人： Mathew G. Schmidt
发明人： Mathew G. Schmidt
CPC分类号： G01V5/125
摘要： A method for determining the fractional amounts of, and the thermal neutron capture cross-sections of, individual components which are included in the decay spectrum measured by a pulsed neutron well logging instrument. The instrument includes a pulsed high energy neutron source, and one or more gamma ray detectors spaced apart from the source. The method includes generating a data kernel which is made up of representors of decay components of the wellbore and of the earth formations in the vicinity of the instrument. The decay spectrum measured by the instrument is inverted to determine parameters by which the representors are scaled so that in combination the scaled representors most closely match the measured decay spectrum. The parameters represent the fractional amounts of each exponential decay component which makes up the measured exponential decay spectrum.
摘要翻译： 用于确定由脉冲中子测井仪测量的衰减光谱中包含的单个组分的分数量和热中子捕获截面的方法。 仪器包括脉冲高能中子源和与源间隔开的一个或多个伽马射线检测器。 该方法包括产生数据核心，该数据核心由仪器附近的井筒和地层的衰减分量的代表构成。 由仪器测量的衰减光谱被反转以确定用于缩放表示器的参数，使得缩放表示器与测量的衰减光谱最接近地匹配。 参数表示构成测量指数衰减光谱的每个指数衰减分量的分数。
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2.发明授权Method and apparatus for beam steering and bessel shading of conformal array 失效波束转向和保形阵列的贝塞尔着色的方法和装置
公开(公告)号：US5640371A
公开(公告)日：1997-06-17
申请号：US562299
申请日：1995-11-22
申请人： Mathew G. Schmidt , John F. Priest
发明人： Mathew G. Schmidt , John F. Priest
CPC分类号： B06B1/0633 , G01V1/52 , G10K11/26 , G01S15/892 , G01S15/8925 , Y10S367/912
摘要： This invention describes a methodology to image features using an array of multiple piezo-electric elements which employs the selective use of mechanical and electronic beam focusing, electronic beam steering and amplitude shading to increase resolution and overcome side lobe effects. This invention introduces a novel signal reconstruction technique utilizing independent array element transmission and reception, creating focusing and beam steering. Application of the methodology can be used in wireline, measurement while drilling, pipe and pipeline and medical applications. Applications include, but are not limited to Bore hole Caliper, Bore hole Geometry, Bore hole Imaging, Casing Inspection, Cement Evaluation and Volumetric Scanning Applications (e.g. Fluid, Behind Casing and Open Hole). The configuration of the transducer array is preferably cylindrical, but may be conical, biconical, convex, concave or may take the form of a number of suitable geometric configurations. The transducer array may incorporate a transformer block having an array of multiple transformers therein for connection to individual transducer circuits. The transformers may be fixed or capable of being mechanically tuned as desired.
摘要翻译： 本发明描述了一种使用多个压电元件阵列对特征进行成像的方法，其采用选择性使用机械和电子束聚焦，电子束转向和幅度阴影来增加分辨率并克服旁瓣效应。 本发明引入了利用独立阵列元件发射和接收的创新信号重建技术，创建了聚焦和光束转向。 该方法的应用可用于电缆，钻井，管道和管道以及医疗应用中的测量。 应用包括但不限于孔眼卡尺，孔眼几何，孔眼成像，套管检查，水泥评估和体积扫描应用（例如流体，套管和开孔）。 换能器阵列的构造优选是圆柱形的，但是可以是圆锥形，双锥形，凸形，凹形或可以采取若干合适几何构型的形式。 换能器阵列可以包括其中具有多个变压器的阵列的变压器块，用于连接到各个换能器电路。 变压器可以是固定的或能够根据需要进行机械调谐。
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公开(公告)号：US4749859A
公开(公告)日：1988-06-07
申请号：US725841
申请日：1985-04-22
申请人： Mathew G. Schmidt
发明人： Mathew G. Schmidt
摘要： A computer-based system and method for acquisition of nuclear well logging data, including downhole generation of energy and time spectral information. For acquiring energy spectrum data, a downhole multi-parameter analyzer is provided including a pulse height analyzer and memory. The analyzer converts each gamma ray pulse height into a digital code by peak detection, level and pulse pile-up discrimination, sample-and-hold, and analog-digital conversion. The digital code includes the address of a unique memory location or channel corresponding to the energy of the particular gamma ray. After a preselected time interval the memory channels collectively contain counts for each incremental energy band in the desired energy spectrum. The memory may then be interrogated by the downhole CPU for presentation of a gamma ray emission versus energy level plot. For acquiring temporal spectrum data, the multi-parameter analyzer also includes a memory address generator. The generator repeatedly produces a numerical sequence of memory address codes corresponding to a sequence of adjacent time windows relative to a reference start time, whereby the windows collectively comprise the time interval of the desired spectrum. Each time a gamma ray pulse is detected, the memory address generated at that time addresses a corresponding memory location and increments the count value resident therein. At conclusion of the time spectrum interval of interest the memory locations may be interrogated by the CPU and presented visually as a gamma ray emission count versus time plot.
摘要翻译： 一种用于获取核测井数据的基于计算机的系统和方法，包括能量和时间光谱信息的井下生成。 为获得能谱数据，提供了一个井下多参数分析仪，包括脉冲高度分析仪和存储器。 分析仪通过峰值检测，电平和脉冲堆积鉴别，采样保持和模数转换将每个伽马射线脉冲高度转换为数字代码。 数字代码包括与特定伽马射线的能量对应的唯一存储器位置或通道的地址。 在预选的时间间隔之后，存储器通道共同地包含在期望的能量谱中的每个增量能带的计数。 然后可以由井下CPU询问存储器，以呈现伽马射线发射与能级图。 为了获取时间谱数据，多参数分析器还包括存储器地址发生器。 发生器相对于参考开始时间重复产生对应于相邻时间窗口序列的存储器地址代码的数字序列，由此窗口统一地包含所需频谱的时间间隔。 每次检测到伽马射线脉冲时，此时产生的存储器地址都会对应一个存储单元，并增加驻留在其中的计数值。 在感兴趣的时间间隔结束时，存储器位置可以由CPU询问，并以视觉方式呈现为伽马射线发射计数与时间图。
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公开(公告)号：US4668863A
公开(公告)日：1987-05-26
申请号：US722096
申请日：1985-04-10
IPC分类号： G01V5/10
摘要： A generalized computer-based system and method for acquisition of nuclear well logging data, including downhole generation of spectral information. A downhole instrument traverses a borehole introducing high energy neutrons into the formation at prescribed depths. Resultant gamma rays are detected and converted into pulses which are amplified and conditioned. For acquiring temporal spectral data, a multi-channel scale section is provided which includes a channel number generator which produces a numerical sequence of memory address codes corresponding to a sequence of adjacent time windows. Each code uniquely defines a start time, whereby the windows collectively comprise the time interval of the desired spectrum. Each time a gamma ray pulse is detected, the memory address generated at that time addresses a corresponding memory location and increments the count value resident therein. At the conclusion of the time spectrum interval of interest, the memory locations may be interrogated by the CPU and the resultant spectral data analyzed, transmitted to the surface, or presented visually as a gamma ray emission count versus time plot.
摘要翻译： 一种广义的基于计算机的系统和获取核测井数据的方法，包括光谱信息的井下生成。 井下仪器穿过将规定深度的高能中子引入地层的井眼。 检测出所产生的γ射线，并将其转换为经过放大和调理的脉冲。 为了获取时间光谱数据，提供了多通道标度部分，其包括通道数发生器，其产生对应于相邻时间窗口序列的存储器地址代码的数字序列。 每个代码唯一地定义开始时间，由此窗口共同地包含所需频谱的时间间隔。 每次检测到伽马射线脉冲时，此时产生的存储器地址都会对应一个存储单元，并增加驻留在其中的计数值。 在感兴趣的时间谱间隔结束时，存储器位置可以由CPU进行询问，并且所分析的所得到的光谱数据，传输到表面，或者视觉地呈现为伽马射线发射计数与时间图。
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公开(公告)号：US5357481A
公开(公告)日：1994-10-18
申请号：US971225
申请日：1992-11-04
申请人： Robert A. Lester , Paul G. Junghans , Donald J. Hilliker , Mathew G. Schmidt , Jose R. Casarsa , Gregory J. Wilkinson
发明人： Robert A. Lester , Paul G. Junghans , Donald J. Hilliker , Mathew G. Schmidt , Jose R. Casarsa , Gregory J. Wilkinson
CPC分类号： G01V1/523 , Y10S367/912
摘要： A logging-tool assembly for generating both flexural wavefields and compressional wavefields in the sidewall formations encountered by a borehole. The assembly consists of a sonde constructed of a plurality of segments that are axially rotatable with respect to each other. Each one of two of the segments includes a compartment in which is mounted a dipole bender bar transmitting transducer. Two additional segments each contain one or more binaurally sensitive receiver transducers. Monopole transmitting and receiving transducers are also included in the respective appropriate segments. An acoustic isolator of novel construction acoustically separates the transmitting transducers from the receiving transducers.
摘要翻译： 一种测井工具组件，用于在井眼遇到的侧壁结构中产生弯曲波场和压缩波场。 该组件包括由相对于彼此可轴向旋转的多个段构成的探空器。 两个片段中的每一个包括隔室，其中安装有偶极弯曲杆发射换能器。 两个附加段各自包含一个或多个双耳敏感的接收换能器。 单极发射和接收换能器也包括在相应的适当段中。 新型结构的声隔离器将发射换能器与接收换能器进行声学分离。
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公开(公告)号：US4766543A
公开(公告)日：1988-08-23
申请号：US725603
申请日：1985-04-22
申请人： Mathew G. Schmidt
发明人： Mathew G. Schmidt
摘要： A generalized computer-based system and method for acquisition of nuclear well logging data, including downhole generation of energy and time spectral information. A downhole instrument traverses a borehole introducing high energy neutrons into the formation at prescribed depths. Resultant gamma rays are detected and converted into pulses which are amplified and conditioned.A downhole multi-parameter analyzer stores pulse height and arrival time for each detected gamma ray whereby time and energy spectra are formed. Spectra include, alone or in combination, time spectra of the neutron source, inelastic and capture energy spectra. From the source time spectra, peaks are detected and capture and inelastic gates referenced thereto. Also thermal neutron decay between source bursts is derived. From the energy spectra peaks including hydrogen or iron are detected and used for calibration and automatic gain control of the gamma ray detector.High speed buffer means and direct memory access enables access to memory by both the multi-parameter analyzer and CPU so as to avoid inhibiting data acquisition during processing of the acquired spectra by the CPU. Parameters including pulse discrimination level, detector gain, and gate positioning affecting the spectra generated downhole, which may simultaneously include inelastic, capture, and time distribution spectra, are variable in the analyzer by means of CPU control functions.
摘要翻译： 一种用于获取核测井数据的广义计算机系统和方法，包括能量和时间光谱信息的井下生成。 井下仪器穿过将规定深度的高能中子引入地层的井眼。 检测出所产生的γ射线，并将其转换为经过放大和调理的脉冲。 井下多参数分析仪存储每个检测到的伽马射线的脉冲高度和到达时间，从而形成时间和能量谱。 光谱单独或组合包括中子源，非弹性和捕获能谱的时间谱。 从源时间光谱中，检测峰，并以捕获和非弹性栅为参考。 导出源突发之间的热中子衰减。 从能谱中检测出包括氢或铁的峰，并用于γ射线检测器的校准和自动增益控制。 高速缓冲装置和直接存储器访问使得多参数分析仪和CPU都可以访问存储器，以避免在CPU处理采集的光谱期间阻止数据采集。 参数包括脉冲识别电平，检测器增益和影响井下生成的光谱的门极定位，可同时包含非弹性，捕获和时间分布光谱，可通过CPU控制功能在分析仪中变化。
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公开(公告)号：US5541889A
公开(公告)日：1996-07-30
申请号：US381128
申请日：1995-01-31
CPC分类号： G01V1/52 , Y10S367/911
摘要： The signal-to-noise ratio of televiewer signals from a rotary sidewall acoustic-beam scanner is improved by replacing the volume of borehole drill fluid that lies in the path of the acoustic beam with a solid medium characterized by a lower coefficient of attenuation than that of the drill fluid.
摘要翻译： 来自旋转侧壁声束扫描器的电视机信号的信噪比通过用位于声束的路径中的钻孔钻井液的体积替换固体介质来改善，该固体介质的特征在于具有较低的衰减系数， 的钻液。
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公开(公告)号：US5444324A
公开(公告)日：1995-08-22
申请号：US279944
申请日：1994-07-25
申请人： John F. Priest , Mathew G. Schmidt
发明人： John F. Priest , Mathew G. Schmidt
CPC分类号： H04R17/00
摘要： The invention is an apparatus for increasing the signal amplitude of a piezoelectric acoustic transducer. A piezoelectric actuator is affixed to an arched spring which changes arched height in response to change in length of the actuator. The spring drives a rigid surface which can be directly coupled to a material which is to be acoustically energized. In a particular embodiment of the invention, the rigid surface is coupled to an hydraulic transmission. The output of the transmission is coupled to the material which is to be acoustically energized.
摘要翻译： 本发明是一种用于增加压电声换能器的信号幅度的装置。 压电致动器被固定到拱形弹簧，其响应于致动器的长度变化而改变拱形高度。 弹簧驱动刚性表面，其可以直接耦合到待声学的材料上。 在本发明的特定实施例中，刚性表面联接到液压传动装置。 变速器的输出与要声学通电的材料相耦合。
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9.发明授权
公开(公告)号：US5089989A
公开(公告)日：1992-02-18
申请号：US609026
申请日：1990-10-30
CPC分类号： G01V1/52 , E21B47/0005 , Y10S367/911
摘要： A new "radial" cement bond instrument is disclosed for measuring the quality of cement to casing bond. The instrument is capable of measuring the quality of the cement bond both vertically and circumferentially. Four arrays of sectored transmitters and receivers are arranged longitudinally along the instrument body and provide a compensated radial bond measurement with high azimuthal resolution. The sectored transmitter excites both a compressional wave and a shear wave in the casing, with the beam pattern of the transmitter focused in a radial direction. The sectored receiver provides additional directivity for enhanced detection of channels in cement. The disclosed apparatus provides measurement of the quality of cement bond in eight radial segments. The resolution of the instrument provides 5 to 10 percent overlap to insure "full" coverage of the borehole. In its normal operational mode, amplitude information is recorded from the sectored receivers, an acoustic signature from a five-ft spaced transmitter-receiver is recorded, and a two-axis orientation measurement is acquired. The system also has the flexibility to acquire and record acoustic signatures from the segmented receivers.
摘要翻译： 公开了一种新的“径向”水泥粘合仪，用于测量水泥与套管粘结的质量。 该仪器能够垂直和周向地测量水泥粘合剂的质量。 四个扇形发射器和接收器阵列沿着仪器主体纵向布置，并提供具有高方位分辨率的补偿径向键测量。 扇形发射机激发壳体中的压缩波和剪切波，发射器的波束图形沿径向聚焦。 扇形接收器为水泥通道的增强检测提供了额外的方向性。 所公开的装置提供八个径向段中的水泥粘合质量的测量。 仪器的解决方案提供了5到10％的重叠，以确保“全面”的钻孔覆盖。 在其正常操作模式中，从扇形接收器记录振幅信息，记录来自五英尺间隔的发射器 - 接收器的声学特征，并且获取双轴取向测量。 该系统还具有从分段接收机获取和记录声学签名的灵活性。
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