METHOD AND APPARATUS FOR DETERMINING THE THERMAL NEUTRON CAPTURE CROSS-SECTION OF A SUBSURFACE FORMATION FROM A BOREHOLE
    1.
    发明申请
    METHOD AND APPARATUS FOR DETERMINING THE THERMAL NEUTRON CAPTURE CROSS-SECTION OF A SUBSURFACE FORMATION FROM A BOREHOLE 有权
    用于确定热中子捕获的方法和装置从钻孔中形成的表面的交叉部分

    公开(公告)号:US20080156976A1

    公开(公告)日:2008-07-03

    申请号:US11621474

    申请日:2007-01-09

    IPC分类号: G01V5/08

    CPC分类号: G01V5/105 G01V5/102

    摘要: Data acquired using a pulsed nuclear source are susceptible to two sources of error. One error is due to large statistical noise towards the end of an acquisition window. Another source of error is the contamination of the early portion of the data by borehole and other effects. The beginning of the processing window is adjusted based on the signal level at the end of the processing window for the preceding pulsing of the source. The end of the processing window is derived from statistical considerations.

    摘要翻译: 使用脉冲核源获得的数据容易受到两个误差源的影响。 一个错误是由于在采集窗口结束时的统计噪音较大。 另一个错误来源是数据的早期部分被钻孔和其他影响所污染。 基于处理窗口末端处的信号电平调整处理窗口的开始,以用于源的前一个脉冲。 处理窗口的结尾是从统计学的考虑得出的。

    Method and apparatus for determining the thermal neutron capture cross-section of a subsurface formation from a borehole
    2.
    发明授权
    Method and apparatus for determining the thermal neutron capture cross-section of a subsurface formation from a borehole 有权
    用于从井眼确定地下地层的热中子捕获截面的方法和装置

    公开(公告)号:US07166834B2

    公开(公告)日:2007-01-23

    申请号:US10730552

    申请日:2003-12-08

    IPC分类号: G01V5/10

    CPC分类号: G01V5/105 G01V5/102

    摘要: Data acquired using a pulsed nuclear source are susceptible to two sources of error. One error is due to large statistical noise towards the end of an acquisition window. Another source of error is the contamination of the early portion of the data by borehole and other effects. The beginning of the processing window is adjusted based on the signal level at the end of the processing window for the preceding pulsing of the source. The end of the processing window is derived from statistical considerations.

    摘要翻译: 使用脉冲核源获得的数据容易受到两个误差源的影响。 一个错误是由于在采集窗口结束时的统计噪音较大。 另一个错误来源是数据的早期部分被钻孔和其他影响所污染。 基于处理窗口末端处的信号电平调整处理窗口的开始,以用于源的前一个脉冲。 处理窗口的结尾是从统计学的考虑得出的。

    Method and apparatus for determining the thermal neutron capture cross-section of a subsurface formation from a borehole
    3.
    发明授权
    Method and apparatus for determining the thermal neutron capture cross-section of a subsurface formation from a borehole 有权
    用于从井眼确定地下地层的热中子捕获截面的方法和装置

    公开(公告)号:US07439494B2

    公开(公告)日:2008-10-21

    申请号:US11621474

    申请日:2007-01-09

    IPC分类号: G01V5/10

    CPC分类号: G01V5/105 G01V5/102

    摘要: Data acquired using a pulsed nuclear source are susceptible to two sources of error. One error is due to large statistical noise towards the end of an acquisition window. Another source of error is the contamination of the early portion of the data by borehole and other effects. The beginning of the processing window is adjusted based on the signal level at the end of the processing window for the preceding pulsing of the source. The end of the processing window is derived from statistical considerations.

    摘要翻译: 使用脉冲核源获得的数据容易受到两个误差源的影响。 一个错误是由于在采集窗口结束时的统计噪音较大。 另一个错误来源是数据的早期部分被钻孔和其他影响所污染。 基于处理窗口末端处的信号电平调整处理窗口的开始,以用于源的前一个脉冲。 处理窗口的结尾是从统计学的考虑得出的。

    Elemental concentration determination using neutron-induced activation gamma radiation

    公开(公告)号:US10324224B2

    公开(公告)日:2019-06-18

    申请号:US13223539

    申请日:2011-09-01

    IPC分类号: G01V5/10

    摘要: The present disclosure relates to borehole logging methods and apparatuses for estimating formation properties using nuclear radiation, particularly an apparatus and method for estimating amounts of silicon and/or oxygen in the formation. The method may include using nuclear radiation information from at least one nuclear radiation detector to estimate at least one parameter of interest. The method may include separating a gross nuclear radiation count into separate nuclear radiation components. The method may also include reducing an error in the estimated formation properties due to speed variations of a nuclear radiation source that activates the silicon and oxygen in the formation. The apparatus may include at least one nuclear radiation detector. The apparatuses may include an information processing device to perform the methods.

    Method and apparatus for an improved formation density indicator using pulsed neutron instruments
    6.
    发明授权
    Method and apparatus for an improved formation density indicator using pulsed neutron instruments 有权
    使用脉冲中子仪器改善地层密度指示器的方法和装置

    公开(公告)号:US07294829B2

    公开(公告)日:2007-11-13

    申请号:US11115792

    申请日:2005-04-27

    IPC分类号: G01V5/10

    CPC分类号: G01V5/101

    摘要: A pulsed neutron source is used in a density logging tool with three or more detectors. This enables compensation for source variations and provides redundant measurements that are used to make borehole corrections and/or corrections for casing.

    摘要翻译: 脉冲中子源用于具有三个或更多个检测器的密度测井工具。 这可以补偿源变化,并提供用于对套管进行钻孔校正和/或校正的冗余测量。

    Targetless pulsed neutron generator using beam-beam interaction
    7.
    发明授权
    Targetless pulsed neutron generator using beam-beam interaction 有权
    使用束束相互作用的无靶脉冲中子发生器

    公开(公告)号:US08604417B2

    公开(公告)日:2013-12-10

    申请号:US13585557

    申请日:2012-08-14

    IPC分类号: G01V5/08

    CPC分类号: G01V5/101 H05H3/06

    摘要: Method and apparatus for evaluating an earth formation using a pulsed neutron source comprising of dual beams of oppositely directed hydrogen isotopic ions with timing and focal characteristics of each beam set to accomplish a beam-to-beam focusing interaction to a selected position that extends axially along a sealed tube. This makes it possible to generate pulsed neutrons from a plurality of positions.

    摘要翻译: 用于使用脉冲中子源评估地层的方法和装置,所述脉冲中子源包括具有相反方向的氢同位素离子的双光束,其具有每个光束组的定时和焦点特征,以实现与轴向沿轴向延伸的选定位置的光束到光束聚焦相互作用 密封管。 这使得可以从多个位置产生脉冲中子。

    Pulsed neutron based monitoring of CO2 in enhanced recovery and sequestration projects
    8.
    发明授权
    Pulsed neutron based monitoring of CO2 in enhanced recovery and sequestration projects 有权
    在增强回收和封存项目中基于脉冲中子的二氧化碳监测

    公开(公告)号:US08471197B2

    公开(公告)日:2013-06-25

    申请号:US12821797

    申请日:2010-06-23

    IPC分类号: G01V7/10

    CPC分类号: E21B47/10 G01V5/101

    摘要: A method for estimating a concentration of carbon dioxide (CO2) in a formation penetrated by a borehole, the method includes: conveying a carrier through the borehole; irradiating the formation with neutrons from a neutron source disposed at the carrier; detecting photons from the formation resulting from the irradiating; and estimating the concentration of CO2 from data acquired from the detecting.

    摘要翻译: 一种用于估计由钻孔渗透的地层中的二氧化碳(CO 2)的浓度的方法,所述方法包括:通过钻孔输送载体; 用设置在载体上的中子源用中子照射地层; 从照射产生的地层中检测光子; 并从从检测获得的数据中估算CO 2的浓度。

    Elemental Concentration Determination Using Neutron-Induced Activation Gamma Radiation
    9.
    发明申请
    Elemental Concentration Determination Using Neutron-Induced Activation Gamma Radiation 审中-公开
    使用中子诱导激光伽马辐射的元素浓度测定

    公开(公告)号:US20120059588A1

    公开(公告)日:2012-03-08

    申请号:US13223539

    申请日:2011-09-01

    IPC分类号: G01V5/04 G06F19/00 G01V5/00

    CPC分类号: G01V5/101

    摘要: The present disclosure relates to borehole logging methods and apparatuses for estimating formation properties using nuclear radiation, particularly an apparatus and method for estimating amounts of silicon and/or oxygen in the formation. The method may include using nuclear radiation information from at least one nuclear radiation detector to estimate at least one parameter of interest. The method may include separating a gross nuclear radiation count into separate nuclear radiation components. The method may also include reducing an error in the estimated formation properties due to speed variations of a nuclear radiation source that activates the silicon and oxygen in the formation. The apparatus may include at least one nuclear radiation detector. The apparatuses may include an information processing device to perform the methods.

    摘要翻译: 本公开涉及用于使用核辐射估计地层特性的钻孔测井方法和装置,特别是用于估计地层中硅和/或氧的量的装置和方法。 该方法可以包括使用来自至少一个核辐射检测器的核辐射信息来估计至少一个感兴趣的参数。 该方法可以包括将总核辐射计数分离成单独的核辐射分量。 该方法还可以包括由于激活地层中的硅和氧的核辐射源的速度变化而减少估计的地层性质的误差。 该装置可以包括至少一个核辐射检测器。 这些装置可以包括执行方法的信息处理装置。