METHODS FOR SOURCELESS DENSITY DOWNHOLE MEASUREMENT USING PULSED NEUTRON GENERATOR
    1.
    发明申请
    METHODS FOR SOURCELESS DENSITY DOWNHOLE MEASUREMENT USING PULSED NEUTRON GENERATOR 有权
    使用脉冲中子发生器进行无源密度测井的方法

    公开(公告)号:US20130048849A1

    公开(公告)日:2013-02-28

    申请号:US13222152

    申请日:2011-08-31

    IPC分类号: G01V5/10

    CPC分类号: G01V5/101

    摘要: Disclosed is a method for estimating a density of an earth formation penetrated by a borehole. The method includes: emitting a pulse of fast neutrons into the formation during a neutron-pulse time interval; detecting gamma-rays due to inelastic scattering and thermal capture of the emitted neutrons in the formation to provide a gamma-ray energy spectrum due to the inelastic scattering and the thermal capture during a first time interval within the neutron-pulse time interval and to provide a time spectrum of counts or count rates due to thermal capture during a second time interval occurring after the neutron-pulse time interval; determining a macroscopic capture cross section of the formation from a decay in the time spectrum of counts or count rates; determining an elemental weight fraction from the gamma-ray energy spectrum; and estimating the density of the formation using the macroscopic capture cross section and the elemental weight fraction.

    摘要翻译: 公开了一种用于估计钻孔渗透的地层的密度的方法。 该方法包括:在中子脉冲时间间隔期间,将快中子脉冲发射到地层中; 由于在中子脉冲时间间隔期间的第一时间间隔期间由于非弹性散射和热捕获而在地层中发射的中子的非弹性散射和热捕获来检测伽马射线,以提供伽马射线能谱,并提供 在中子脉冲时间间隔后发生的第二时间间隔期间由于热捕获引起的计数或计数率的时间谱; 从计数或计数率的时间谱中的衰减确定地层的宏观捕获截面; 从伽马射线能谱确定元素重量分数; 并使用宏观捕获截面和元素重量分数来估计地层的密度。

    Methods for sourceless density downhole measurement using pulsed neutron generator
    2.
    发明授权
    Methods for sourceless density downhole measurement using pulsed neutron generator 有权
    使用脉冲中子发生器的无源密度井下测量方法

    公开(公告)号:US08476584B2

    公开(公告)日:2013-07-02

    申请号:US13222152

    申请日:2011-08-31

    IPC分类号: G01V5/10

    CPC分类号: G01V5/101

    摘要: Disclosed is a method for estimating a density of an earth formation penetrated by a borehole. The method includes: emitting a pulse of fast neutrons into the formation during a neutron-pulse time interval; detecting gamma-rays due to inelastic scattering and thermal capture of the emitted neutrons in the formation to provide a gamma-ray energy spectrum due to the inelastic scattering and the thermal capture during a first time interval within the neutron-pulse time interval and to provide a time spectrum of counts or count rates due to thermal capture during a second time interval occurring after the neutron-pulse time interval; determining a macroscopic capture cross section of the formation from a decay in the time spectrum of counts or count rates; determining an elemental weight fraction from the gamma-ray energy spectrum; and estimating the density of the formation using the macroscopic capture cross section and the elemental weight fraction.

    摘要翻译: 公开了一种用于估计钻孔渗透的地层的密度的方法。 该方法包括:在中子脉冲时间间隔期间,将快中子脉冲发射到地层中; 由于在中子脉冲时间间隔期间的第一时间间隔期间由于非弹性散射和热捕获而在地层中发射的中子的非弹性散射和热捕获来检测γ射线以提供伽马射线能谱,并提供 在中子脉冲时间间隔后发生的第二时间间隔期间由于热捕获引起的计数或计数率的时间谱; 从计数或计数率的时间谱中的衰减确定地层的宏观捕获截面; 从伽马射线能谱确定元素重量分数; 并使用宏观捕获截面和元素重量分数来估计地层的密度。

    Use of chemically and geologically consistent constraints for obtaining elemental chemistry downhole
    3.
    发明授权
    Use of chemically and geologically consistent constraints for obtaining elemental chemistry downhole 有权
    使用化学和地质一致的约束来获得井下元素化学

    公开(公告)号:US08311744B2

    公开(公告)日:2012-11-13

    申请号:US12764422

    申请日:2010-04-21

    IPC分类号: G06F19/00 G01V5/00

    摘要: A method for estimating a lithotype of an earth formation, the method includes: obtaining at least two different energy spectra of radiation received from the earth formation using the logging tool, each energy spectrum having at least one of a natural gamma-ray spectrum, a fast neutron-induced inelastic spectrum, and a thermal neutron induced capture spectrum; establishing at least one geochemically-based constraint related to elemental spectral yields to be determined; determining the elemental spectral yields from the at least two different energy spectra by decomposing the at least two different energy spectra over weighted sum of monoelemental standards wherein at least one weight is constrained by the at least one geochemically-based constraint and each weight represents a proportion of one monoelemental standard; converting the elemental spectral yields to elemental concentrations; and using a classifier to receive the elemental concentrations as input and to provide a lithotype as output.

    摘要翻译: 一种用于估计地球岩石类型的方法,所述方法包括:使用测井工具获得从地层接收的辐射的至少两个不同能量谱,每个能谱具有自然伽马射线谱, 快中子诱导的非弹性光谱和热中子诱导的捕获光谱; 建立至少一个与确定基本光谱产量相关的基于地球化学的约束; 通过在至少一个重量受至少一个基于地球化学的约束约束的至少一个重量约束下分解至少两个不同的能量谱,通过分解至少两个不同的能量谱来确定来自至少两个不同的能量谱的元素光谱产量,并且每个权重表示比例 的一个元素标准; 将元素光谱产量转化为元素浓度; 并且使用分类器来接收元素浓度作为输入,并提供作为输出的光刻类型。

    Real-Time Lithology and Mineralogy Interpretation
    4.
    发明申请
    Real-Time Lithology and Mineralogy Interpretation 审中-公开
    实时岩性和矿物学解释

    公开(公告)号:US20110218735A1

    公开(公告)日:2011-09-08

    申请号:US13031325

    申请日:2011-02-21

    IPC分类号: G01V5/04 G06F19/00

    CPC分类号: G01V5/125

    摘要: Elemental analysis of an earth formation is obtained using measurements from a gamma ray logging tool. From only the elemental analysis and measurements of porosity, density and natural gamma rays, an estimate of the mineralogy of the formation is made treating the problem as one of minimizing a quadratic objective function subject to equality and/or inequality constraints.

    摘要翻译: 使用伽马射线测井工具的测量可以获得地层的元素分析。 仅从孔隙度,密度和自然伽马射线的元素分析和测量,对地层的矿物学的估计是将问题作为将平等和/或不等式约束的二次目标函数最小化的问题。

    INELASTIC BACKGROUND CORRECTION FOR A PULSED-NEUTRON INSTRUMENT
    5.
    发明申请
    INELASTIC BACKGROUND CORRECTION FOR A PULSED-NEUTRON INSTRUMENT 有权
    脉冲中子仪器的惰性背景校正

    公开(公告)号:US20090242746A1

    公开(公告)日:2009-10-01

    申请号:US12055599

    申请日:2008-03-26

    IPC分类号: G01V5/10

    CPC分类号: G01V5/101

    摘要: A method for correcting data collected with a neutron emitting instrument, includes: obtaining characterization data for the instrument, the characterization data including inelastic background data of the instrument; and correcting the collected data according to the characterization data. A computer program product and an instrument are provided.

    摘要翻译: 一种用于校正用中子发射仪器收集的数据的方法,包括:获得仪器的表征数据,表征数据包括仪器的非弹性背景数据; 并根据特征数据校正收集的数据。 提供计算机程序产品和仪器。

    METHOD FOR DETERMINING FORMATION WATER RESISTIVITY FROM A WIRELINE PULSED NEUTRON DEVICE
    6.
    发明申请
    METHOD FOR DETERMINING FORMATION WATER RESISTIVITY FROM A WIRELINE PULSED NEUTRON DEVICE 有权
    用于确定丝束脉冲中性装置的形成水电阻率的方法

    公开(公告)号:US20090326825A1

    公开(公告)日:2009-12-31

    申请号:US12146071

    申请日:2008-06-25

    IPC分类号: G01V3/38

    CPC分类号: G01V5/101

    摘要: A method for estimating resistivity of a formation includes: selecting spectra collected by pulsed neutron instrument disposed down a wellbore traversing the formation, the spectra including capture interactions and inelastic interactions; deconvolving the spectra to estimate an elemental yield; converting the elemental yield to a total concentration value; subtracting a concentration value for drilling mud and a concentration value for the formation from the total concentration value to estimate a concentration in fluid within the formation; and converting the fluid concentration value to a resistivity value. A computer program product and an instrument are provided.

    摘要翻译: 一种用于估计地层电阻率的方法包括:选择由穿过地层的井筒设置的脉冲中子仪收集的光谱,光谱包括捕获相互作用和非弹性相互作用; 对光谱进行解卷积估计元素产量; 将元素产量转化为总浓度值; 从总浓度值减去钻井泥浆的浓度值和形成的浓度值,以估计地层内流体的浓度; 并将流体浓度值转换为电阻率值。 提供计算机程序产品和仪器。

    Pulsed neutron based monitoring of CO2 in enhanced recovery and sequestration projects
    7.
    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。

    Inelastic background correction for a pulsed-neutron instrument
    9.
    发明授权
    Inelastic background correction for a pulsed-neutron instrument 有权
    脉冲中子仪器的非弹性背景校正

    公开(公告)号:US07718955B2

    公开(公告)日:2010-05-18

    申请号:US12055599

    申请日:2008-03-26

    IPC分类号: G01V5/10

    CPC分类号: G01V5/101

    摘要: A method for correcting data collected with a neutron emitting instrument, includes: obtaining characterization data for the instrument, the characterization data including inelastic background data of the instrument; and correcting the collected data according to the characterization data. A computer program product and an instrument are provided.

    摘要翻译: 一种用于校正用中子发射仪器收集的数据的方法,包括:获得仪器的表征数据,表征数据包括仪器的非弹性背景数据; 并根据特征数据校正收集的数据。 提供计算机程序产品和仪器。

    Use of PNC tools to determine the depth and relative location of proppant in fractures and the near borehole region
    10.
    发明授权
    Use of PNC tools to determine the depth and relative location of proppant in fractures and the near borehole region 有权
    使用PNC工具来确定支撑剂在裂缝和近井眼区域的深度和相对位置

    公开(公告)号:US09038715B2

    公开(公告)日:2015-05-26

    申请号:US13461498

    申请日:2012-05-01

    摘要: Methods are provided for identifying the location and height of induced subterranean formation fractures and the presence of any associated frac-pack or gravel pack material in the vicinity of the borehole using pulsed neutron capture (PNC) logging tools. The proppant/sand used in the fracturing and packing processes is tagged with a thermal neutron absorbing material. When proppant is present, increases in detected PNC formation and/or borehole component cross-sections, combined with decreases in measured count rates, are used to determine the location of the formation fractures and the presence and percent fill of pack material in the borehole region. Changes in measured formation cross-sections relative to changes in other PNC parameters provide a relative indication of the proppant in fractures compared to that in the borehole region.

    摘要翻译: 提供了用于使用脉冲中子捕获(PNC)测井工具来识别诱发的地层岩石断裂的位置和高度以及在钻孔附近存在任何相关压裂填料或砾石填充材料的方法。 在压裂和包装过程中使用的支撑剂/砂用热中子吸收材料标记。 当支撑剂存在时,检测到的PNC形成和/或钻孔组分横截面的增加以及测量计数率的降低结合使用来确定地层断裂的位置以及在井眼区域中包装材料的存在和百分比填充 。 相对于其他PNC参数的变化,测量地层横截面的变化提供了与井眼区域相比,支撑剂在裂缝中的相对指示。