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    MAGNET ARRAY
    3.
    发明申请
    MAGNET ARRAY 有权
    磁网阵列

    公开(公告)号：US20100148777A1

    公开(公告)日：2010-06-17

    申请号：US12516321

    申请日：2007-11-23

    Applicant: Andrew E. Marble ,  Bruce J. Balcom ,  Bruce Colpitts ,  Igor V Mastikhin

    Inventor： Andrew E. Marble ,  Bruce J. Balcom ,  Bruce Colpitts ,  Igor V Mastikhin

    IPC: G01R33/32 ,  H01F7/02

    CPC classification number: G01R33/383 ,  G01N24/08 ,  G01N24/081 ,  G01R33/3808 ,  G01R33/5617 ,  H01F7/0284

    Abstract: A magnet array is disclosed which is suitable for inter alia producing a remote field for use in unilateral magnetic resonance. In the “Magnet Array”, two separated magnets, which are magnetized along a substantially same collinear magnetization direction, produce a field with a local maximum centered above and between them. The field produced by the two separated magnets is substantially parallel to the collinear magnetization direction of the two separated magnets. A third magnet is centered between the two separated magnets. The third magnet has a magnetization direction which is substantially parallel to the collinear magnetization direction of the two separated magnets. The third magnet produces a field which is substantially parallel to the collinear magnetization direction of the two separated magnets, and adds to the increasing field below the local maximum point produced by the two separated magnets. The field of the third magnet, which decays with distance, adds to the increasing field below the local maximum point. The position of the third magnet is selected in order to generate a total field which has at least one of its first and second spatial derivatives with respect to the distance above the magnet array substantially equal to zero.

    Abstract translation: 公开了一种磁体阵列，其特别适用于制造用于单边磁共振的远场。 在“磁体阵列”中，沿着基本相同的共线磁化方向被磁化的两个分离的磁体产生具有以它们之上和之间的中心的局部最大值的场。 由两个分离的磁体产生的磁场基本上平行于两个分离的磁体的共线磁化方向。 第三个磁体位于两个分离的磁体之间。 第三磁体具有基本上平行于两个分离的磁体的共线磁化方向的磁化方向。 第三磁体产生基本上平行于两个分离的磁体的共线磁化方向的磁场，并且增加了由两个分离的磁体产生的局部最大点以下的增加磁场。 随着距离衰减的第三磁体的场增加了局部最大点以下的增加场。 选择第三磁体的位置以产生相对于磁体阵列上方的距离基本上等于零的至少一个第一和第二空间导数的总场。

    Magnet array
    4.
    发明授权
    Magnet array 有权
    磁铁阵列

    公开(公告)号：US08593144B2

    公开(公告)日：2013-11-26

    申请号：US12516321

    申请日：2007-11-23

    Applicant: Andrew E. Marble ,  Bruce J Balcom ,  Bruce Colpitts ,  Igor V Mastikhin

    Inventor： Andrew E. Marble ,  Bruce J Balcom ,  Bruce Colpitts ,  Igor V Mastikhin

    IPC: G01V3/00

    CPC classification number: G01R33/383 ,  G01N24/08 ,  G01N24/081 ,  G01R33/3808 ,  G01R33/5617 ,  H01F7/0284

    Abstract: A magnet array is disclosed which is suitable for inter alia producing a remote field for use in unilateral magnetic resonance. In the “Magnet Array”, two separated magnets, which are magnetized along a substantially same collinear magnetization direction, produce a field with a local maximum centered above and between them. The field produced by the two separated magnets is substantially parallel to the collinear magnetization direction of the two separated magnets. A third magnet is centered between the two separated magnets. The third magnet has a magnetization direction which is substantially parallel to the collinear magnetization direction of the two separated magnets. The third magnet produces a field which is substantially parallel to the collinear magnetization direction of the two separated magnets, and adds to the increasing field below the local maximum point produced by the two separated magnets. The field of the third magnet, which decays with distance, adds to the increasing field below the local maximum point. The position of the third magnet is selected in order to generate a total field which has at least one of its first and second spatial derivatives with respect to the distance above the magnet array substantially equal to zero.

    Abstract translation: 公开了一种磁体阵列，其特别适用于制造用于单边磁共振的远场。 在“磁体阵列”中，沿着基本相同的共线磁化方向被磁化的两个分离的磁体产生具有以它们之上和之间的中心的局部最大值的场。 由两个分离的磁体产生的磁场基本上平行于两个分离的磁体的共线磁化方向。 第三个磁体位于两个分离的磁体之间。 第三磁体具有基本上平行于两个分离的磁体的共线磁化方向的磁化方向。 第三磁体产生基本上平行于两个分离的磁体的共线磁化方向的磁场，并且增加了由两个分离的磁体产生的局部最大点以下的增加磁场。 随着距离衰减的第三磁体的场增加了局部最大点以下的增加场。 选择第三磁体的位置以产生相对于磁体阵列上方的距离基本上等于零的至少一个第一和第二空间导数的总场。

    Methods suitable for measuring capillary pressure and relative permeability curves of porous rocks
    5.
    发明授权
    Methods suitable for measuring capillary pressure and relative permeability curves of porous rocks 有权
    适用于测量多孔岩石毛细管压力和相对渗透率曲线的方法

    公开(公告)号：US07567079B2

    公开(公告)日：2009-07-28

    申请号：US11808300

    申请日：2007-06-08

    Applicant: Quan Chen ,  Bruce J. Balcom

    Inventor： Quan Chen ,  Bruce J. Balcom

    IPC: G01V3/00

    CPC classification number: G01R33/44 ,  G01N15/082 ,  G01N24/081 ,  G01R33/4816 ,  G01V3/32 ,  Y02A90/344

    Abstract: Single-shot methods suitable for determining capillary pressure and relative permeability curves in petroleum reservoir core plugs are proposed. Three classes of measurement are outlined. (i) Measurements undertaken with steady state gas flow and stationary water or oil phases in the rock. SPRITE (Single-Point Ramped Imaging with T1 Enhancement) MRI (Magnetic Resonance Imaging) spin density images map spatially varying fluid content. (ii) Similar measurements are proposed with a stationary gas phase and flowing water or oil phases. (iii) Measurements are also possible with either water or oil as the stationary phase, with the other phase undergoing steady state flow. In all cases the outflow boundary condition is maintained, capillary pressure zero, by washing the outlet face of the sample with the stationary fluid phase.

    Abstract translation: 提出了适用于测定石油储层岩心塞中毛细管压力和相对渗透率曲线的单次喷射方法。 概述了三类测量。 （i）用稳态气体流动和岩石中固定的水或油相进行的测量。 SPRITE（具有T1增强功能的单点成像）MRI（磁共振成像）自旋密度图像映射空间变化的流体含量。 （ii）使用固定气相和流动的水或油相提出了类似的测量。 （iii）也可以用水或油作为固定相进行测量，另一相经历稳态流动。 在所有情况下，通过用固定流体相清洗样品的出口面，维持流出边界条件，毛细管压力为零。

    Magnetic field generator suitable for unilateral nuclear magnetic resonance and method for making same
    7.
    发明授权
    Magnetic field generator suitable for unilateral nuclear magnetic resonance and method for making same 有权

    公开(公告)号：US08237440B2

    公开(公告)日：2012-08-07

    申请号：US11896332

    申请日：2007-08-31

    Applicant: Bruce J. Balcom ,  Andrew E. Marble ,  Igor V. Mastikhin ,  Bruce Colpitts

    Inventor： Bruce J. Balcom ,  Andrew E. Marble ,  Igor V. Mastikhin ,  Bruce Colpitts

    IPC: G01V3/00

    CPC classification number: G01R33/3808 ,  G01R33/383 ,  Y10T29/49075

    Abstract: A unilateral NMR sensor comprising a ferromagnetic yoke; a permanent magnet arranged on the yoke; a pole piece on the magnet; the pole piece including an air-pole piece interface surface whose shape corresponds to an equipotential contour of magnetic scalar potential. An approach for designing single-sided magnets suitable for unilateral magnetic resonance (UMR) measurements is presented. The method uses metal pole pieces to shape the field from permanent magnets in a target region. The pole pieces are shaped according to solutions to Laplace's equation, and can be designed using a combination of analytical methods and numerical optimization. The design leads to analytical expressions for the pole piece shape and magnetic field. The method is developed in Cartesian, polar, and spherical coordinates, and the merits of each system are discussed. The effects of finite magnet size on the field quality are explored through simulation, and are found to have a substantial effect in many cases. A magnet is designed using our method to produce a static field with a constant gradient over a region 2 cm in diameter and 2 mm thick. This leads to a compact cylindrical magnet just over 11 cm in diameter, topped with a single metal pole piece. The design is validated through simulation. The simulated field is found to agree closely with that specified analytically through the design procedure.

    Magnetic field generator suitable for unilateral nuclear magnetic resonance and method for making same
    8.
    发明申请
    Magnetic field generator suitable for unilateral nuclear magnetic resonance and method for making same 有权
    适用于单边核磁共振的磁场发生器及其制造方法

    公开(公告)号：US20120049849A1

    公开(公告)日：2012-03-01

    申请号：US11896332

    申请日：2007-08-31

    Applicant: Bruce J. Balcom ,  Andrew E. Marble ,  Igor V. Mastikhin ,  Bruce Colpitts

    Inventor： Bruce J. Balcom ,  Andrew E. Marble ,  Igor V. Mastikhin ,  Bruce Colpitts

    IPC: G01R33/44 ,  B23P11/00

    CPC classification number: G01R33/3808 ,  G01R33/383 ,  Y10T29/49075

    Abstract: A unilateral NMR sensor comprising a ferromagnetic yoke; a permanent magnet arranged on the yoke; a pole piece on the magnet; the pole piece including an air-pole piece interface surface whose shape corresponds to an equipotential contour of magnetic scalar potential. An approach for designing single-sided magnets suitable for unilateral magnetic resonance (UMR) measurements is presented. The method uses metal pole pieces to shape the field from permanent magnets in a target region. The pole pieces are shaped according to solutions to Laplace's equation, and can be designed using a combination of analytical methods and numerical optimization. The design leads to analytical expressions for the pole piece shape and magnetic field. The method is developed in Cartesian, polar, and spherical coordinates, and the merits of each system are discussed. The effects of finite magnet size on the field quality are explored through simulation, and are found to have a substantial effect in many cases. A magnet is designed using our method to produce a static field with a constant gradient over a region 2 cm in diameter and 2 mm thick. This leads to a compact cylindrical magnet just over 11 cm in diameter, topped with a single metal pole piece. The design is validated through simulation. The simulated field is found to agree closely with that specified analytically through the design procedure.

    Abstract translation: 单侧NMR传感器，包括铁磁轭; 设置在轭架上的永磁体; 磁铁上的极片; 所述极片包括空气极片接口表面，其形状对应于磁标量势的等电位轮廓。 提出了一种适用于单边磁共振（UMR）测量设计单面磁体的方法。 该方法使用金属极片从目标区域中的永磁体形成场。 极片根据拉普拉斯方程的解决方案成型，可以使用分析方法和数值优化的组合进行设计。 该设计导致极片形状和磁场的解析表达式。 该方法以笛卡尔坐标，极坐标和球面坐标发展，并讨论了每个系统的优点。 通过模拟研究了有限磁体尺寸对场质量的影响，发现在许多情况下具有实质效果。 使用我们的方法设计磁体，以在直径为2厘米，厚度为2毫米的区域上产生具有恒定梯度的静态场。 这导致直径超过11厘米的紧凑型圆柱形磁体，顶部有一个单一的金属极片。 该设计通过仿真验证。 发现模拟场与设计过程中通过分析指定密切相关。

    Methods suitable for measuring capillary pressure and relative permeability curves of porous rocks
    9.
    发明申请
    Methods suitable for measuring capillary pressure and relative permeability curves of porous rocks 有权
    适用于测量多孔岩石毛细管压力和相对渗透率曲线的方法

    公开(公告)号：US20080303520A1

    公开(公告)日：2008-12-11

    申请号：US11808300

    申请日：2007-06-08

    Applicant: Quan Chen ,  Bruce J. Balcom

    Inventor： Quan Chen ,  Bruce J. Balcom

    IPC: G01V3/14 ,  G01V3/00

    CPC classification number: G01R33/44 ,  G01N15/082 ,  G01N24/081 ,  G01R33/4816 ,  G01V3/32 ,  Y02A90/344

    Abstract: Single-shot methods suitable for determining capillary pressure and relative permeability curves are proposed. For steady-state gas flow, with stationary water or oil remaining in a porous rock core and the outflow boundary condition (capillary pressure is zero) is maintained by washing the outlet face of the core with the stationary phase, the gas pressure distribution, P(x), is determined by SPRITE (Single-Point Ramped Imaging with T1 Enhancement) MRI (Magnetic Resonance Imaging) spin density imaging of flowing gas, since the spin density of gas is directly proportional to the pressure of the gas phase. Water or oil saturation distribution, S(x), at the present of steady-state flowing gas, is measured with MRI. The combination of P(x) and S(x) yields a capillary pressure curve, Pc(S) and relative permeability curve of flowing gas phase, Krg(S) can be determined with differential form of Darcy's law and ideal gas equations for gas flowing at steady-state. Some embodiments include the steps of providing a porous rock core having a length, an inlet face, and an outlet face; saturating the porous rock core with a first fluid; displacing the first fluid by applying a second fluid to the inlet face of the porous rock core; washing the outlet face of the porous rock core with said second fluid so as to maintain an outflow boundary condition; determining that a substantially steady-state condition has been reached whereat the fluid saturation distribution and pressure distribution along the length of the core do not substantially change with time; performing a single-shot measurement of at least one of a fluid saturation distribution measurement of the porous rock core and a pressure distribution measurement of the porous rock core; and determining a property of the porous rock core by using the single-shot measurement.

    Abstract translation: 提出了适用于确定毛细管压力和相对渗透率曲线的单次方法。 对于稳态气体流动，通过用固定相清洗芯的出口面，气体压力分布P（P），通过固定的水或油保留在多孔岩芯中，并且流出边界条件（毛细管压力为零） （x）由SPRITE（具有T1增强的单点成像成像）由流动气体的磁共振成像（磁共振成像）自旋密度成像确定，因为气体的自旋密度与气相的压力成正比。 用静态流动气体测定水分或油饱和度分布S（x）。 P（x）和S（x）的组合产生毛细管压力曲线，流动气相的Pc（S）和相对渗透率曲线，Krg（S）可以用达西定律的差分形式和气体的理想气体方程 在稳态流动。 一些实施例包括提供具有长度，入口面和出口面的多孔岩芯的步骤; 用第一流体使多孔岩芯饱和; 通过将第二流体施加到多孔岩芯的入口面来移位第一流体; 用所述第二流体清洗多孔岩芯的出口面，以保持流出边界条件; 确定已经达到基本上稳定状态的状态，其中沿芯的长度的流体饱和分布和压力分布基本上不随时间变化; 对多孔岩芯的流体饱和度分布测量和多孔岩芯的压力分布测量中的至少一个进行单次测量; 以及通过使用单次测量来确定多孔岩心的性质。

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