System and method for gain regulation
    1.
    发明授权
    System and method for gain regulation 有权
    增益调节系统和方法

    公开(公告)号:US09372271B2

    公开(公告)日:2016-06-21

    申请号:US14116315

    申请日:2012-05-17

    Inventor: Robert A. Adolph

    CPC classification number: G01T1/40 G01T1/362 G01T1/366 G01V5/101 G01V5/12

    Abstract: Disclosed herein is a system for fast gain regulation in a gamma-ray spectroscopy instrument. The system includes a detector configured to generate a signal indicative of energy arriving at the detector, and a processor configured to determine one or more system performance indicators. The system also includes a controller configured to compute a first gain correction term based on one of more system performance indicators and change the device gain based on the computed first gain correction tem.

    Abstract translation: 本文公开了一种用于γ射线光谱仪器中快速增益调节的系统。 该系统包括被配置为产生指示到达检测器的能量的信号的检测器,以及被配置为确定一个或多个系统性能指标的处理器。 该系统还包括控制器,该控制器被配置为基于更多系统性能指标之一计算第一增益校正项,并且基于所计算的第一增益校正度改变器件增益。

    Formation evaluation through azimuthal tool-path identification
    2.
    发明授权
    Formation evaluation through azimuthal tool-path identification 有权
    通过方位角工具路径识别形成评估

    公开(公告)号:US06696684B2

    公开(公告)日:2004-02-24

    申请号:US10034476

    申请日:2001-12-28

    CPC classification number: G01V5/125

    Abstract: A method for tool path identification in formation evaluation includes obtaining measurements of formation properties in azimuthal sectors for each of a plurality of depth levels; calculating quality factors from the measurements; identifying a centroid or maximum of the quality factors among the measurements in each of the azimuthal sectors for each depth level; and associating the centroid or maximum of the quality factors at each depth level along a borehole to form the tool path. Calculating the quality factors may include parameterizing the measurements according to at least one factor selected from a spine factor, a rib factor, and a volumetric photoelectric factor. A method for determining corrected measurements for formation properties includes identifying a tool path from measurements taken in azimuthal sectors at each depth level along a borehole; and calculating a corrected measurement at the each depth level by averaging measurements in the azimuthal sectors adjacent the tool path.

    Abstract translation: 在地层评价中用于工具路径识别的方法包括获得多个深度级中的每一个的方位角扇区中的地层特性的测量; 从测量中计算质量因子; 在每个深度级的每个方位角扇区中测量质量因子的质心或最大值; 并且沿着钻孔将每个深度级的质量因子的质心或最大值相关联以形成工具路径。 计算质量因子可以包括根据从脊柱因子,肋因子和体积光电因子中选择的至少一个因素来参数化测量。 用于确定用于地层性质的校正测量的方法包括从沿着钻孔的每个深度级的方位角段中进行的测量中识别刀具路径; 以及通过对与所述刀具路径相邻的所述方位区域中的测量进行平均,来计算所述每个深度级的校正测量值。

    Thermal neutron porosity from neutron slowing-down length, formation thermal neutron capture cross section, and bulk density
    3.
    发明授权
    Thermal neutron porosity from neutron slowing-down length, formation thermal neutron capture cross section, and bulk density 有权
    来自中子减速长度的热中子孔隙度,形成热中子捕获截面积和体积密度

    公开(公告)号:US07667192B2

    公开(公告)日:2010-02-23

    申请号:US11839608

    申请日:2007-08-16

    CPC classification number: G01V5/107

    Abstract: A method for determining at least one formation property calculated from neutron measurements acquired with a downhole tool includes emitting neutrons from a source in the tool into the formation, detecting neutrons with at least one detector in the downhole tool, calculating a first slowing-down length (L1) based on the detected neutrons, and deriving a second slowing-down length (L2) based on the first slowing-down length (L1). Further steps include deriving a correlation function for relating slowing-down lengths from a first tool to slowing-down lengths associated with a different source, wherein the correlation function depends on formation properties such as bulk density; and applying the correlation function to the slowing-down length of the first tool to derive the slowing-down length of the second tool. A method for determining a thermal neutron formation porosity based on a slowing-down length from epithermal neutron measurements from an electronic neutron source includes converting the slowing-down length into a computed neutron slowing-down length from thermal neutron measurements from a chemical neutron source, wherein the converting uses a correlation function that depends on formation bulk density; deriving a thermal neutron countrate ratio based on the computed neutron slowing-down length, wherein the deriving uses a function that depends on the formation bulk density and formation sigma; and computing the thermal neutron formation porosity from the thermal neutron countrate ratio.

    Abstract translation: 用于确定由井下工具获取的中子测量计算的至少一个地层特性的方法包括从工具中的源将地层中子发射到地层中,用井下工具中的至少一个检测器检测中子,计算第一减速长度 (L1),并且基于第一减速长度(L1)导出第二减速长度(L2)。 进一步的步骤包括导出相关函数,用于将来自第一工具的减速长度与与不同源相关联的减速长度相关联,其中所述相关函数取决于地层特性,例如体积密度; 以及将所述相关函数应用于所述第一工具的减速长度以导出所述第二工具的减速长度。 基于来自电子中子源的超热中子测量的基于减速长度确定热中子形成孔隙的方法包括将来自化学中子源的热中子测量的减速长度转换成计算的中子减速长度, 其中所述转换使用取决于地层堆积密度的相关函数; 基于计算的中子减速长度导出热中子剂量比,其中导出使用取决于地层堆积密度和形成σ的函数; 并从热中子计数比计算热中子形成孔隙度。

    Sigma/porosity tools with neutron monitors
    4.
    发明授权
    Sigma/porosity tools with neutron monitors 有权
    具有中子监视器的Sigma /孔隙度工具

    公开(公告)号:US07365307B2

    公开(公告)日:2008-04-29

    申请号:US11307630

    申请日:2006-02-15

    CPC classification number: G01V5/104

    Abstract: A tool for formation logging includes a support configured for movement in a borehole; a neutron source disposed on the support; a neutron monitor disposed on the support and configured to monitor an output of the neutron source; a gamma-ray detector disposed on the support and spaced apart from the neutron source; and a shielding material disposed between the gamma-ray detector and the neutron source.

    Abstract translation: 用于地层测井的工具包括构造成在钻孔中移动的支撑件; 设置在支撑件上的中子源; 中子监视器,其设置在所述支撑件上并且被配置为监测所述中子源的输出; 设置在支撑件上并与中子源间隔开的伽马射线探测器; 以及设置在伽马射线检测器和中子源之间的屏蔽材料。

    System And Method For Gain Regulation
    5.
    发明申请
    System And Method For Gain Regulation 有权
    增益调节系统和方法

    公开(公告)号:US20140145072A1

    公开(公告)日:2014-05-29

    申请号:US14116315

    申请日:2012-05-17

    Inventor: Robert A. Adolph

    CPC classification number: G01T1/40 G01T1/362 G01T1/366 G01V5/101 G01V5/12

    Abstract: Disclosed herein is a system for fast gain regulation in a gamma-ray spectroscopy instrument. The system includes a detector configured to generate a signal indicative of energy arriving at the detector, and a processor configured to determine one or more system performance indicators. The system also includes a controller configured to compute a first gain correction term based on one of more system performance indicators and change the device gain based on the computed first gain correction tem.

    Abstract translation: 本文公开了一种用于γ射线光谱仪器中快速增益调节的系统。 该系统包括被配置为产生指示到达检测器的能量的信号的检测器,以及被配置为确定一个或多个系统性能指标的处理器。 该系统还包括控制器,该控制器被配置为基于更多系统性能指标之一计算第一增益校正项,并且基于所计算的第一增益校正度改变器件增益。

    Compensation of errors in logging-while-drilling density measurements
    7.
    发明授权
    Compensation of errors in logging-while-drilling density measurements 有权
    记录钻井密度测量中的误差补偿

    公开(公告)号:US06307199B1

    公开(公告)日:2001-10-23

    申请号:US09310893

    申请日:1999-05-12

    CPC classification number: E21B47/08 G01V5/125

    Abstract: A system is disclosed for compensating well logs for adverse effects of the borehole and near borehole formation effects. The system is configured primarily for processing logging-while-drilling (LWD) density measurements, and includes means for generating a one-dimensional density log which is corrected for adverse effects of logging tool standoff and “dipping” beds penetrated by the borehole. The system is, however, applicable to any type of LWD or other type of logging system which requires borehole corrections, and which responds to variations in formation properties in a plane perpendicular to the borehole. The system can also be modified to include LWD apparatus using sensors that require no borehole corrections, and only require corrections for dipping beds. The system is ideally suited for logging equipment using two sensors, but can be modified for use with single sensor systems or systems using more than two sensors.

    Abstract translation: 公开了一种用于补偿测井的井筒的不利影响和近井眼形成效应的系统。 该系统主要用于处理钻井测井(LWD)密度测量,并且包括用于生成一维密度测井的装置,其被校正用于测井工具分离的不利影响和钻孔渗透的“浸渍”床。 然而,该系统适用于需要钻孔校正的任何类型的LWD或其他类型的测井系统,其响应垂直于钻孔的平面中的地层特性的变化。 该系统也可以被修改为包括使用不需要钻孔校正的传感器的LWD装置,并且仅需要对浸渍床进行校正。 该系统非常适用于使用两个传感器记录设备,但可以修改为使用单个传感器系统或使用两个以上传感器的系统。

    Dead time correction and regulation method and apparatus for nuclear
spectroscopy
    8.
    发明授权
    Dead time correction and regulation method and apparatus for nuclear spectroscopy 失效
    死亡时间校正和调节方法和核子光谱仪器

    公开(公告)号:US5132540A

    公开(公告)日:1992-07-21

    申请号:US711599

    申请日:1991-06-06

    CPC classification number: G01T1/171

    Abstract: A nuclear spectroscopy method and apparatus for the analysis of a signal comprising pulses representative of random nuclear events, and for the determination of the dead time, including counting and recording, versus time, the accumulated counts of the pile-up events (PU), i.e. events identified as being characteristic of two or more overlapping events, and the counts of non pile-up events (NPU), for each of successive time intervals of a measurement cycle. Particularly the method includes: forming a preliminary reference plot of the PU count rates versus the NPU count rates; forming an actual plot corresponding to the signal under analysis, of PU count rates versus NPU count rates; and deducing the dead time from comparison between actual and reference plots. In an alternative embodiment, the method allows one to maintain constant the dead time, during the signal analysis, by: establishing a preliminary relationship between dead time and different plots of PU count rates versus NPU count rates; establishing a preliminary relationship between the plots and a functioning parameter; establishing a reference plot corresponding to an imposed dead time; establishing an actual plot; comparing the actual and reference plots; and modifying the functioning parameter so as to bring the respective actual and reference plots in compliance.

    Thermally-protected scintillation detector
    9.
    发明授权
    Thermally-protected scintillation detector 有权
    热保护闪烁检测器

    公开(公告)号:US08987670B2

    公开(公告)日:2015-03-24

    申请号:US12573194

    申请日:2009-10-05

    CPC classification number: G01T1/202 G01T1/20 G01V5/00 G01V5/10

    Abstract: Systems, methods, and devices for thermally protecting a scintillator crystal of a scintillation detector are provided. In one example, a thermally-protected scintillator may include a scintillator crystal and a thermal protection element, which may partially surround the scintillator crystal. The thermal protection element may be configured to prevent the scintillator crystal from experiencing a rate of change in temperature sufficient to cause cracking or non-uniform light output, or a combination thereof.

    Abstract translation: 提供了用于热保护闪烁体检测器的闪烁体晶体的系统,方法和装置。 在一个示例中,热保护闪烁器可以包括可以部分地围绕闪烁体晶体的闪烁体晶体和热保护元件。 热保护元件可以被配置为防止闪烁体晶体经历足以引起开裂或不均匀光输出的温度变化率,或其组合。

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