公开(公告)号：US09372277B2

公开(公告)日：2016-06-21

申请号：US12764814

申请日：2010-04-21

Applicant: Peter Wraight ,  James Thornton ,  Bradley A. Roscoe

Inventor： Peter Wraight ,  James Thornton ,  Bradley A. Roscoe

IPC: G01V5/10

CPC classification number: G01V5/107

Abstract: Systems and methods for neutron porosity well logging with high precision and reduced lithology effects are provided. In accordance with an embodiment, a downhole neutron porosity tool may include a neutron source, a neutron monitor, a neutron detector, and data processing circuitry. The neutron source may emit neutrons into a subterranean formation while the neutron monitor detects a count of neutrons proportional to the neutrons emitted. The neutron detector may detect a count of neutrons that scatters off the subterranean formation. The data processing circuitry may determine an environmentally corrected porosity of the subterranean formation based at least in part on the count rate of neutrons scattered off the subterranean formation normalized to the count rate of neutrons proportional to the neutrons emitted by the neutron source.

Abstract translation: 提供了具有高精度和降低岩性效应的中子孔隙测井的系统和方法。 根据实施例，井下中子孔隙度工具可以包括中子源，中子监测器，中子检测器和数据处理电路。 中子源可以将中子发射到地下地层，而中子监测器检测到与发射的中子成比例的中子数。 中子探测器可以检测到离开地下地层的中子数量。 数据处理电路可以至少部分地基于从地下地层散射的中子的计数率归一化为与中子发射的中子成比例的中子的计数率，来确定地下地层的环境校正的孔隙度。

公开(公告)号：US09031790B2

公开(公告)日：2015-05-12

申请号：US12729384

申请日：2010-03-23

Applicant: James Thornton ,  Bradley A. Roscoe

Inventor： James Thornton ,  Bradley A. Roscoe

IPC: G01V5/10 ,  G01V1/30 ,  G01V1/48

CPC classification number: G01V5/107

Abstract: Systems, methods, and devices for determining a porosity of a subterranean formation corrected for borehole effects are provided. One such device may be a downhole tool capable of being lowered into a borehole of a subterranean formation that may include a neutron source, two or more neutron detectors, and data processing circuitry. The neutron source may emit neutrons into the subterranean formation. The two or more neutron detectors may be respectively disposed at two or more azimuthal orientations within the downhole tool, and may detect neutrons scattered by the subterranean formation or borehole fluid in the borehole, or both. Based on the neutrons detected by the neutron detectors, the data processing circuitry may determine a porosity of the subterranean formation corrected for borehole effects.

Abstract translation: 提供了用于确定钻孔效应校正的地下孔隙度的系统，方法和装置。 一种这样的装置可以是能够降低到可以包括中子源，两个或更多个中子检测器和数据处理电路的地下地层的井眼中的井下工具。 中子源可以将中子发射到地层中。 两个或更多个中子探测器可以分别设置在井下工具内的两个或更多个方位取向，并且可以检测由地层中的中子或钻孔中的钻孔流体或两者。 基于由中子检测器检测到的中子，数据处理电路可以确定针对钻孔效应校正的地层的孔隙度。

公开(公告)号：US08319175B2

公开(公告)日：2012-11-27

申请号：US12872355

申请日：2010-08-31

Applicant: Zilu Zhou ,  Markus Berheide ,  Felix Chen ,  Bradley A. Roscoe ,  Joyce Wong ,  Martin G. Luling ,  Olivier Philip

Inventor： Zilu Zhou ,  Markus Berheide ,  Felix Chen ,  Bradley A. Roscoe ,  Joyce Wong ,  Martin G. Luling ,  Olivier Philip

IPC: G01V5/04

CPC classification number: G01T1/16 ,  B82Y15/00 ,  G01T1/18 ,  G01T3/008

Abstract: Methods and devices relating to a radiation detector comprising of a gas chamber having a cathode plate and a substrate separated by a gap. An array of nano-tips deposited on the substrate that forms an anode structure for electron charge collection. An external power source in communication with the cathode plate and the substrate, wherein the external power source is capable of generating a plurality of regions and each region includes an electric field near each nano-tip of the array of the nano-tips that results in initiating a radiation induced controlled discharge of electrons and ions from at least one gas or at least one gas mixture. Finally, the plurality of regions include multiple generated electric fields near tips of the array of nano-tips such as CNTs, that communicatively create a conductive path between the cathode plate and the substrate, the radiation detector is capable of determining at least one radiation property.

Abstract translation: 涉及辐射检测器的方法和装置，包括具有阴极板和由间隙隔开的基板的气室。 沉积在衬底上的纳米尖端的阵列，其形成用于电子电荷收集的阳极结构。 与阴极板和衬底连通的外部电源，其中外部电源能够产生多个区域，并且每个区域包括纳米尖端阵列的每个纳米尖端附近的电场，导致导致 引发辐射诱导的电子和离子从至少一种气体或至少一种气体混合物的受控放电。 最后，多个区域包括在诸如CNT之类的纳米尖端阵列的尖端附近的多个产生的电场，其在阴极板和衬底之间通信地形成导电路径，该辐射探测器能够确定至少一个辐射特性 。

公开(公告)号：US20120049054A1

公开(公告)日：2012-03-01

申请号：US12872355

申请日：2010-08-31

Applicant: Zilu Zhou ,  Markus Berheide ,  Felix Chen ,  Bradley A. Roscoe ,  Joyce Wong ,  Martin G. Luling ,  Olivier Philip

Inventor： Zilu Zhou ,  Markus Berheide ,  Felix Chen ,  Bradley A. Roscoe ,  Joyce Wong ,  Martin G. Luling ,  Olivier Philip

IPC: G01V5/04 ,  G01T1/185 ,  H01J47/00 ,  G01T3/00 ,  B82Y99/00 ,  B82Y15/00

CPC classification number: G01T1/16 ,  B82Y15/00 ,  G01T1/18 ,  G01T3/008

Abstract: Methods and devices relating to a radiation detector comprising of a gas chamber having a cathode plate and a substrate separated by a gap. An array of nano-tips deposited on the substrate that forms an anode structure for electron charge collection. An external power source in communication with the cathode plate and the substrate, wherein the external power source is capable of generating a plurality of regions and each region includes an electric field near each nano-tip of the array of the nano-tips that results in initiating a radiation induced controlled discharge of electrons and ions from at least one gas or at least one gas mixture. Finally, the plurality of regions include multiple generated electric fields near tips of the array of nano-tips such as CNTs, that communicatively create a conductive path between the cathode plate and the substrate, the radiation detector is capable of determining at least one radiation property.

Abstract translation: 涉及辐射检测器的方法和装置，包括具有阴极板和由间隙隔开的基板的气室。 沉积在衬底上的纳米尖端的阵列，其形成用于电子电荷收集的阳极结构。 与阴极板和衬底连通的外部电源，其中外部电源能够产生多个区域，并且每个区域包括纳米尖端阵列的每个纳米尖端附近的电场，导致导致 引发辐射诱导的电子和离子从至少一种气体或至少一种气体混合物的受控放电。 最后，多个区域包括在诸如CNT之类的纳米尖端阵列的尖端附近的多个产生的电场，其在阴极板和衬底之间通信地形成导电路径，该辐射探测器能够确定至少一个辐射特性 。

公开(公告)号：US20110238313A1

公开(公告)日：2011-09-29

申请号：US12729384

申请日：2010-03-23

Applicant: James Thornton ,  Bradley A. Roscoe

Inventor： James Thornton ,  Bradley A. Roscoe

IPC: G01V5/10 ,  G06F19/00

CPC classification number: G01V5/107

Abstract: Systems, methods, and devices for determining a porosity of a subterranean formation corrected for borehole effects are provided. One such device may be a downhole tool capable of being lowered into a borehole of a subterranean formation that may include a neutron source, two or more neutron detectors, and data processing circuitry. The neutron source may emit neutrons into the subterranean formation. The two or more neutron detectors may be respectively disposed at two or more azimuthal orientations within the downhole tool, and may detect neutrons scattered by the subterranean formation or borehole fluid in the borehole, or both. Based on the neutrons detected by the neutron detectors, the data processing circuitry may determine a porosity of the subterranean formation corrected for borehole effects.

Abstract translation: 提供了用于确定钻孔效应校正的地下孔隙度的系统，方法和装置。 一种这样的装置可以是能够降低到可以包括中子源，两个或更多个中子检测器和数据处理电路的地下地层的井眼中的井下工具。 中子源可以将中子发射到地层中。 两个或更多个中子探测器可以分别设置在井下工具内的两个或更多个方位取向，并且可以检测由地层中的中子或钻孔中的钻孔流体或两者。 基于由中子检测器检测到的中子，数据处理电路可以确定针对钻孔效应校正的地层的孔隙度。

公开(公告)号：US5539225A

公开(公告)日：1996-07-23

申请号：US307894

申请日：1994-09-16

Applicant: William A. Loomis ,  Kenneth E. Stephenson ,  Jerome A. Truax ,  Wolfgang P. Ziegler ,  S. Zema Chowdhuri ,  Benoit Couet ,  Michael L. Evans ,  Paul Albats ,  Bradley A. Roscoe ,  Jacques M. Holenka ,  Keith A. Moriarty ,  William R. Sloan

Inventor： William A. Loomis ,  Kenneth E. Stephenson ,  Jerome A. Truax ,  Wolfgang P. Ziegler ,  S. Zema Chowdhuri ,  Benoit Couet ,  Michael L. Evans ,  Paul Albats ,  Bradley A. Roscoe ,  Jacques M. Holenka ,  Keith A. Moriarty ,  William R. Sloan

IPC: G01V5/10

CPC classification number: G01V5/104 ,  G01V5/101 ,  G01V5/107

Abstract: Measurement-while-drilling apparatus includes a 14 MeV neutron accelerator, a near-spaced neutron detector which primarily senses source neutrons and whose output is proportional to source strength, one or more intermediately-spaced epithermal neutron detectors eccentered against the drill collar wall and primarily responsive to formation hydrogen concentration, and a third far-spaced radiation detector, either gamma ray or neutron, primarily responsive to formation density. The intermediately-spaced and far-spaced detector outputs, normalized by the near-spaced detector output, are combined to provide measurements of porosity, density and lithology and to detect gas. A thermal neutron detector and/or a gamma ray detector may also be provided at intermediate spacings to provide additional information of interest, such as standoff measurements and spectral analysis of formation composition. Tool outputs are related to the angular or azimuthal orientation of the measurement apparatus in the borehole.

Abstract translation: 测量同时钻探装置包括14MeV中子加速器，近距离中子探测器，其主要感测源中子并且其输出与源强度成比例，一个或多个间隔开的超热中子检测器偏心于钻铤壁，主要 响应于地层氢浓度，以及第三远距离辐射探测器，伽马射线或中子，主要响应地层密度。 通过近距离检测器输出归一化的中间间隔和远距离的检测器输出被组合以提供孔隙度，密度和岩性的测量并检测气体。 还可以以中间间隔提供热中子检测器和/或γ射线检测器以提供感兴趣的附加信息，例如间隔测量和地层组成的光谱分析。 刀具输出与钻孔中测量装置的角度或方位角方向有关。

公开(公告)号：US20090057545A1

公开(公告)日：2009-03-05

申请号：US11848473

申请日：2007-08-31

Applicant: Richard Saenger ,  Bradley A. Roscoe ,  Zilu Zhou ,  Christian Stoller

Inventor： Richard Saenger ,  Bradley A. Roscoe ,  Zilu Zhou ,  Christian Stoller

IPC: G01V5/10

CPC classification number: G01T3/08 ,  G01V5/04

Abstract: A nuclear tool includes a tool housing; a neutron generator disposed in the tool housing; and a solid-state neutron monitor disposed proximate the neutron generator for monitoring the output of the neutron generator. A method for constructing a nuclear tool includes disposing a neutron generator in a tool housing; and disposing a solid-state neutron monitor proximate the neutron generator for monitoring the output of the neutron generator. A method for logging a formation includes disposing a nuclear tool in a wellbore penetrating the formation, wherein the nuclear tool comprises a neutron generator and a solid-state neutron monitor disposed proximate the neutron generator; generating neutrons from the neutron generator; monitoring neutrons generated by the neutron generator using the solid-state neutron monitor; detecting signals generated from the neutrons traveling in the formation; and correcting the detected signals, based on signal strength detected by the solid-state neutron monitor, to produce corrected signals.

Abstract translation: 核工具包括工具外壳; 设置在工具壳体中的中子发生器; 以及靠近中子发生器设置的用于监测中子发生器的输出的固态中子监视器。 一种用于构造核工具的方法包括将中子发生器设置在工具壳体中; 并在中子发生器附近设置一个固态中子监测器，用于监测中子发生器的输出。 记录地层的方法包括将核工具放置在穿透地层的井眼中，其中所述核工具包括中子发生器和靠近中子发生器设置的固态中子监测器; 从中子发生器产生中子; 使用固态中子监测器监测由中子发生器产生的中子; 检测从地层中行进的中子产生的信号; 并且基于由固态中子监视器检测的信号强度来校正检测信号，以产生校正信号。

公开(公告)号：US20080121817A1

公开(公告)日：2008-05-29

申请号：US11563359

申请日：2006-11-27

Applicant: Arthur J. Becker ,  Yanqi Wang ,  Bradley A. Roscoe ,  John Simonetti

Inventor： Arthur J. Becker ,  Yanqi Wang ,  Bradley A. Roscoe ,  John Simonetti

IPC: G01T1/202 ,  C30B15/14

CPC classification number: G01T1/202

Abstract: An LuAP scintillation detector and a method for improving the light output and uniformity of an LuAP scintillator crystal is provided, wherein the method includes disposing the scintillator crystal in a predetermined environment at a threshold temperature to generate an initial scintillator crystal, annealing the initial scintillator crystal in the predetermined environment at the threshold temperature to create an annealed scintillator crystal and cooling the annealed scintillator crystal in the predetermined environment to a final temperature.

Abstract translation: 提供LuAP闪烁检测器和用于提高LuAP闪烁体晶体的光输出和均匀性的方法，其中所述方法包括将闪烁体晶体设置在阈值温度下的预定环境中以产生初始闪烁体晶体，退火初始闪烁体晶体 在预定环境中在阈值温度下产生退火的闪烁体晶体，并将预定环境中退火的闪烁体晶体冷却至最终温度。

公开(公告)号：US5543617A

公开(公告)日：1996-08-06

申请号：US266077

申请日：1994-06-27

Applicant: Bradley A. Roscoe ,  Jeffrey S. Schweitzer ,  Kenneth E. Stephenson

Inventor： Bradley A. Roscoe ,  Jeffrey S. Schweitzer ,  Kenneth E. Stephenson

IPC: E21B47/10 ,  G01F1/708 ,  G01V5/04

CPC classification number: E21B47/1015 ,  G01F1/708

Abstract: A method of measuring flow velocities in flowing fluids includes injecting into the flow a non-radioactive tracer having a neutron capture cross section higher than that of the flowing fluids, for example a gadolinium compound, and measuring the neutron capture cross section in the fluid downstream of the injection point to detect the passage of the tracer and hence determine the time of flight. By making the tracer miscible with only one phase (typically the continuous phase) of a multi-phase fluid, it is possible to measure the flow velocity of that phase. The neutron capture cross section can be measured by irradiating with neutrons from a pulsed neutron generator and measuring capture .gamma. rays with a scintillation detector.

Abstract translation: 测量流动流体中的流速的方法包括向流中注入具有高于流动流体例如钆化合物的中子捕获截面的非放射性示踪剂，并测量下游流体中的中子俘获截面 的注射点，以检测示踪物的通过，从而确定飞行时间。 通过使示踪剂仅与多相流体的一相（通常为连续相）混溶，可以测量该相的流速。 中子捕获截面可以通过用来自脉冲中子发生器的中子照射并用闪烁检测器测量捕获γ射线来测量。

公开(公告)号：US5369578A

公开(公告)日：1994-11-29

申请号：US64622

申请日：1993-05-20

Applicant: Bradley A. Roscoe ,  Christian Stoller

Inventor： Bradley A. Roscoe ,  Christian Stoller

IPC: G01V5/06 ,  G01V5/10 ,  G06F15/21

CPC classification number: G01V5/101 ,  G01V5/06

Abstract: A method and an apparatus for decomposing a gamma spectrum representative of an unknown material for determining the contribution of each constituent postulated to constitute the material, wherein an energy spectrum of the gamma rays issued from the material is formed, as well as a composite spectrum made up of individual standard spectra of the postulated constituents and comprising elemental yields being representative of the proportion of the corresponding constituents; the best fit between the measured spectrum and the composite spectrum is determined by modifying simultaneously at least one elemental yield and at least one parameter representative of the conditions under which the measured spectrum and the composite spectrum have been obtained. The best fit may be based on any non linear least squares search for a global minimum of X.sup.2 =(S Y-U).sup.T W(S Y-U), where "U" is a matrix representing the measured spectrum, "S" is a matrix representing the composite spectrum, "Y" is a matrix representative of the elemental yields and "W" is a weight matrix. The non linear fitting method used may be e.g. a gradient search or the Marquardt method.

Abstract translation: 一种用于分解表示未知材料的伽马光谱的方法和装置，用于确定假定构成材料的每个组成部分的贡献，其中形成从材料发出的伽马射线的能谱以及形成的复合光谱 假定的成分的单个标准光谱的单位，并且包括代表相应成分的比例的元素产率; 测量光谱和复合光谱之间的最佳拟合通过同时修改至少一个元素产量和至少一个代表所获得的测量光谱和复合光谱条件的参数来确定。 最佳拟合可以基于任何非线性最小二乘搜索全局最小值X2 =（S YU）TW（S YU），其中“U”是表示测量光谱的矩阵，“S”是表示 复合光谱，“Y”是表示元素产量的矩阵，“W”是权重矩阵。 所使用的非线性拟合方法可以是例如。 梯度搜索或Marquardt方法。