Measurement of downhole gamma radiation by reduction of compton scattering
    1.
    发明授权
    Measurement of downhole gamma radiation by reduction of compton scattering 有权
    通过减少柯顿散射来测量井下伽马辐射

    公开(公告)号:US09201160B2

    公开(公告)日:2015-12-01

    申请号:US14076054

    申请日:2013-11-08

    CPC classification number: G01V5/06 G01V5/101

    Abstract: Systems, methods and devices for evaluating an earth formation intersected by a borehole. The method includes using a first radiation responsive component to detect gamma rays having an energy below a threshold energy; using a second radiation responsive component configured to detect gamma rays that traverse the first radiation responsive component; generating a reduced-Compton gamma ray spectrum by generating an anticoincidence gamma ray spectrum indicative of the gamma rays detected by the first radiation responsive component and the gamma rays detected by the second radiation responsive component. The anticoincidence gamma ray spectrum represents those gamma rays of the gamma rays detected by the second radiation responsive component that are not detected in coincidence with the gamma rays detected by the first radiation responsive component.

    Abstract translation: 用于评估钻孔相交的地层的系统,方法和装置。 该方法包括使用第一辐射响应分量来检测具有低于阈值能量的能量的伽马射线; 使用配置成检测穿过所述第一辐射响应分量的伽马射线的第二辐射响应分量; 通过产生指示由第一辐射响应分量检测到的伽马射线和由第二辐射响应分量检测的伽马射线产生反伽马射线谱产生缩小的康普顿伽马射线谱。 防伪伽马射线光谱表示由第二辐射响应分量检测到的伽马射线的伽马射线,其不与由第一辐射响应分量检测到的伽马射线一致地检测到。

    Gamma calibration
    2.
    发明授权

    公开(公告)号:US10520641B2

    公开(公告)日:2019-12-31

    申请号:US15599214

    申请日:2017-05-18

    Abstract: Estimating parameters of interest of a formation, including density, porosity, and fluid saturation. Methods relate to gamma ray energy spectra calibration for a radiation detector including generating a calibration radiation spectrum using measurements of radiation with the detector in a time interval wherein the radiation comprises predominantly gamma rays emitted by decay of radionuclides produced by neutron activation reactions resulting from neutron irradiation, the time interval following a prior time interval corresponding to thermal neutrons produced from the irradiation; making at least one other radiation measurement with the detector outside the time interval; and producing a calibrated radiation measurement from the at least one other radiation measurement using the calibration radiation spectrum. The measurements may be taken in the time interval by conveying the radiation detector in the borehole at high speed and using a background gate of the detector.

    Neutron and gamma sensitive fiber scintillators
    3.
    发明授权
    Neutron and gamma sensitive fiber scintillators 有权
    中子和γ敏感纤维闪烁体

    公开(公告)号:US09482763B2

    公开(公告)日:2016-11-01

    申请号:US14273418

    申请日:2014-05-08

    CPC classification number: G01T3/06 G01T1/201 G01V5/101 G01V5/107 G01V5/125

    Abstract: One general embodiment according to the present disclosure may be formation evaluation tool for detecting radiation in a borehole in a volume of an earth formation. The tool may include a detector including a monolithic scintillation element comprising a coherent assemblage of joined fibers, wherein the fibers are made of an optically transparent scintillation media. The fibers may be at least one of i) gamma ray responsive; and ii) neutron responsive. The coherent assemblage of fibers may be a continuous mass, may be heat-joined. The fibers may be solid. The scintillation media may comprise at least one of i) organic crystalline scintillation materials, ii) amorphous glass, and iii) nanostructured glass ceramics. The coherent assemblage of fibers may be asymmetric. The coherent assemblage of fibers may surround a further scintillation media having different scintillation characteristics than the scintillation media. The scintillation element may be azimuthally sensitive.

    Abstract translation: 根据本公开的一般实施例可以是用于检测地球体积的井眼中的辐射的地层评估工具。 该工具可以包括检测器,该检测器包括包括连接纤维的相干组合的单片闪烁元件,其中所述纤维由光学透明的闪烁介质制成。 纤维可以是i)伽马射线响应性中的至少一种; 和ii)中子响应。 纤维的相干组合可以是连续的质量,可以是热连接的。 纤维可以是固体。 闪烁介质可以包括i)有机晶体闪烁材料,ii)无定形玻璃和iii)纳米结构玻璃陶瓷中的至少一种。 纤维的相干组合可能是不对称的。 纤维的相干组合可以围绕具有与闪烁介质不同的闪烁特性的另外的闪烁介质。 闪烁元件可以是方位角敏感的。

    Digital spectrometer for measuring ironizing radiation downhole

    公开(公告)号:US10436933B2

    公开(公告)日:2019-10-08

    申请号:US15148651

    申请日:2016-05-06

    Abstract: Systems, methods, and devices for evaluating an earth formation intersected by a borehole. Apparatus may include at least one radiation detector configured to generate an analog electrical signal responsive to a plurality of radiation events, comprising absorption of incident ionizing radiation at a corresponding energy level, and an ionizing radiation spectrometer configured to convert each analog electrical signal from the at least one radiation detector into a plurality of digital signal pulses corresponding to the radiation events and resolve the plurality of digital signal pulses into radiation count information representative of the radiation events. Spectrometers include an input channel for each detector of the at least one radiation detector comprising an analog-to-digital converter (ADC) and configured to convert the analog electrical signal for each detector into the plurality of digital signal pulses; and at least one processor configured to generate the radiation count information.

    Thermal and epithermal neutrons from an earth formation
    5.
    发明授权
    Thermal and epithermal neutrons from an earth formation 有权
    来自地层的热和超热中子

    公开(公告)号:US09261624B2

    公开(公告)日:2016-02-16

    申请号:US13918200

    申请日:2013-06-14

    CPC classification number: G01V5/107 G01V5/08

    Abstract: An apparatus and method for detecting radiation in a borehole intersecting an earth formation. The apparatus may include a neutron sensitive scintillation media and at least one optically transparent neutron absorptive material optically coupled to the media, which may be positioned to prevent incident neutrons from reaching a neutron-shaded surface of the media, and to provide directional sensitivity. The neutron absorptive material may comprise a light guide optically coupled to the neutron sensitive scintillation media. The scintillation media may be disposed within the at least one optically transparent neutron absorptive material, which may be configured to prevent substantially all incident neutrons having an incident neutron energy below a selected energy threshold from reaching the media. The selected energy threshold may be approximately 0.2 eV. A neutron-reflecting material may be disposed within the scintillation media. The neutron-reflecting material may comprise a light guide optically coupled to the neutron sensitive scintillation media.

    Abstract translation: 一种用于检测与地层相交的钻孔中的辐射的装置和方法。 该装置可以包括中子敏感的闪烁介质和光学耦合到介质的至少一种光学透明的中子吸收材料,其可被定位成防止入射的中子到达介质的中子阴影表面,并提供方向灵敏度。 中子吸收材料可以包括与中子敏感的闪烁介质光学耦合的光导。 闪烁介质可以设置在所述至少一个光学透明中子吸收材料内,所述中子吸收材料可以被配置为防止具有低于所选能量阈值的入射中子能量的基本上所有入射的中子到达介质。 所选择的能量阈值可以是大约0.2eV。 中子反射材料可以设置在闪烁介质内。 中子反射材料可以包括与中子敏感的闪烁介质光学耦合的光导。

    NEUTRON AND GAMMA SENSITIVE FIBER SCINTILLATORS
    6.
    发明申请
    NEUTRON AND GAMMA SENSITIVE FIBER SCINTILLATORS 有权
    NEUTRON和GAMMA敏感光纤扫描仪

    公开(公告)号:US20150323683A1

    公开(公告)日:2015-11-12

    申请号:US14273418

    申请日:2014-05-08

    CPC classification number: G01T3/06 G01T1/201 G01V5/101 G01V5/107 G01V5/125

    Abstract: One general embodiment according to the present disclosure may be formation evaluation tool for detecting radiation in a borehole in a volume of an earth formation. The tool may include a detector including a monolithic scintillation element comprising a coherent assemblage of joined fibers, wherein the fibers are made of an optically transparent scintillation media. The fibers may be at least one of i) gamma ray responsive; and ii) neutron responsive. The coherent assemblage of fibers may be a continuous mass, may be heat-joined. The fibers may be solid. The scintillation media may comprise at least one of i) organic crystalline scintillation materials, ii) amorphous glass, and iii) nanostructured glass ceramics. The coherent assemblage of fibers may be asymmetric. The coherent assemblage of fibers may surround a further scintillation media having different scintillation characteristics than the scintillation media. The scintillation element may be azimuthally sensitive.

    Abstract translation: 根据本公开的一般实施例可以是用于检测地球体积的井眼中的辐射的地层评估工具。 该工具可以包括检测器,该检测器包括包括连接纤维的相干组合的单片闪烁元件,其中所述纤维由光学透明的闪烁介质制成。 纤维可以是i)伽马射线响应性中的至少一种; 和ii)中子响应。 纤维的相干组合可以是连续的质量,可以是热连接的。 纤维可以是固体。 闪烁介质可以包括i)有机晶体闪烁材料,ii)无定形玻璃和iii)纳米结构玻璃陶瓷中的至少一种。 纤维的相干组合可能是不对称的。 纤维的相干组合可以围绕具有与闪烁介质不同的闪烁特性的另外的闪烁介质。 闪烁元件可以是方位角敏感的。

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