DETERMINATION OF GAS SATURATION RADIAL PROFILE FROM MULTI-FREQUENCY NMR DATA
    51.
    发明申请
    DETERMINATION OF GAS SATURATION RADIAL PROFILE FROM MULTI-FREQUENCY NMR DATA 有权
    从多频谱数据中确定气体饱和辐射剖面

    公开(公告)号:US20080234937A1

    公开(公告)日:2008-09-25

    申请号:US11689887

    申请日:2007-03-22

    IPC分类号: G01V3/38 G01V3/14

    摘要: A method for determining fluid saturation in a formation at a plurality of radial depths near a wellbore, the method including: obtaining multi-frequency nuclear magnetic resonance (NMR) response data for the formation; and processing the data to determine simultaneously the fluid saturation at each radial depth. A computer program product is provided.

    摘要翻译: 一种用于确定井眼附近的多个径向深度处的地层中的流体饱和度的方法,所述方法包括:获得用于地层的多频核磁共振(NMR)响应数据; 并处理数据以同时确定每个径向深度处的流体饱和度。 提供计算机程序产品。

    Pore-scale geometric models for interpretation of downhole formation evaluation data
    52.
    发明授权
    Pore-scale geometric models for interpretation of downhole formation evaluation data 有权
    用于解释井下地层评估数据的孔隙尺度几何模型

    公开(公告)号:US07363161B2

    公开(公告)日:2008-04-22

    申请号:US11445023

    申请日:2006-06-01

    IPC分类号: G01V3/18

    CPC分类号: G01V3/32 G01N24/081

    摘要: The grain size of a pore-scale geometric model of a clastic earth formation are adjusted so that the NMR relaxation time distribution output of the model matches a measured NMR distribution. Fluid drainage and imbibing can be simulated. Additional properties of the earth formation are predicted using the pore-scale model. The additional properties may be based on additional measurements of properties of a fluid in the formation.

    摘要翻译: 调整碎屑土地层的孔隙尺度几何模型的晶粒尺寸,使得模型的NMR弛豫时间分布输出与测量的NMR分布相匹配。 可以模拟流体排水和吸水。 使用孔隙尺度模型预测地层的附加属性。 额外的性质可以基于地层中流体的性质的附加测量。

    Automatic Adjustment of NMR Pulse Sequence to Optimize SNR Based On Real Time Analysis
    53.
    发明申请
    Automatic Adjustment of NMR Pulse Sequence to Optimize SNR Based On Real Time Analysis 有权
    基于实时分析的NMR脉冲序列自动调整优化SNR

    公开(公告)号:US20080021654A1

    公开(公告)日:2008-01-24

    申请号:US11782212

    申请日:2007-07-24

    IPC分类号: E21B47/00

    摘要: Data from a string of multiple formation evaluation data sensor are evaluated by an expert system. Based on the analysis, the logging speed is increased if all the sensors justify it, and is reduced if any of the sensors require a reduced logging speed. Alternatively, the sensitive volume of a NMR sensor is altered based on a determination of a fraction of the sensitive volume that includes a borehole fluid. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

    摘要翻译: 来自一系列多层评估数据传感器的数据由专家系统评估。 基于分析,如果所有的传感器证明它,记录速度就会提高,如果任何一个传感器需要降低记录速度,就会降低记录速度。 或者,基于包括井眼流体的敏感体积的分数的确定来改变NMR传感器的灵敏体积。 要强调的是,该摘要被提供以符合要求抽象的规则,这将允许搜索者或其他读者快速确定技术公开的主题。 提交它的理解是,它不会用于解释或限制权利要求的范围或含义。

    Pore-scale geometric models for interpretation of downhole formation evaluation data
    54.
    发明申请
    Pore-scale geometric models for interpretation of downhole formation evaluation data 有权
    用于解释井下地层评估数据的孔隙尺度几何模型

    公开(公告)号:US20060276969A1

    公开(公告)日:2006-12-07

    申请号:US11147063

    申请日:2005-06-03

    IPC分类号: G01V9/00

    CPC分类号: G01V11/00

    摘要: Parameters of a pore-scale geometric model of a clastic earth formation are adjusted so that the output of the model matches measurements made one a core sample. Additional properties of the earth formation are predicted using the pore-scale model. The additional properties may be based on additional measurements of properties of a fluid in the formation.

    摘要翻译: 调整碎屑岩地层的孔隙尺度几何模型的参数,使得模型的输出与测量结果匹配成为一个核心样本。 使用孔隙尺度模型预测地层的附加属性。 额外的性质可以基于地层中流体的性质的附加测量。

    Gas zone evaluation by combining dual wait time NMR data with density data
    56.
    发明授权
    Gas zone evaluation by combining dual wait time NMR data with density data 有权
    通过组合双等时时间NMR数据与密度数据进行气体区评估

    公开(公告)号:US06331775B1

    公开(公告)日:2001-12-18

    申请号:US09396286

    申请日:1999-09-15

    IPC分类号: G01V300

    CPC分类号: G01V11/00 G01N24/081 G01V3/32

    摘要: A method for acquiring nuclear magnetic resonance measurements of a medium uses a modified CPMG pulse sequence wherein the refocusing pulses may be optiimized, having a shorter duration than a 180° pulse. Data are acquired in gas reservoirs using two different wait times, both of which are sufficient to polarize the liquid in the reservoir to a known exteny, preferably 100%, while the amount of polarization of the gas in the reservoir is substantially different for the two wait times. Data from the dual wait time NMR pulse sequences give two different apparent porosities of the formation. A third apparent porosity is obtained from density measurements. Combining these three apparent porosities with a temperature measurement and empirical relations between various petrophysical parameters gives the true porosity, the gas density, the gas hydrogen index and the spin-lattice relaxation time of the gas at a single depth. In an alternate embodiment of the invention, apparent porosity measurements made at a plurality of depths within a connected gas reservoir are averaged and, in combination with temperature measurements in the reservoir, the same petrophysical parameters are obtained with the gas properties being constant, thus reducing numerical instability in the solution of the equations relating the petrophysical parameters.

    摘要翻译: 用于获取介质的核磁共振测量的方法使用修改的CPMG脉冲序列,其中重聚焦脉冲可被优化,具有比180°脉冲更短的持续时间。 使用两个不同的等待时间在气藏中获取数据,这两个等待时间都足以将储层中的液体极化到已知的范围,优选为100%,同时储存器中的气体的极化量对于两个 等待时间 来自双等待时间NMR脉冲序列的数据给出了两个不同的表观孔隙度的形成。 从密度测量获得第三表观孔隙率。 将这三种表观孔隙度与温度测量和各种岩石物理参数之间的经验关系相结合,可以获得真实的孔隙度,气体密度,气体氢指数和单一深度气体的自旋晶格弛豫时间。 在本发明的替代实施例中,在连接的气体储存器内的多个深度处进行的表观孔隙度测量被平均,并且与储层中的温度测量结合,获得相同的岩石物理参数,其中气体性质是恒定的,从而减少 与岩石物理参数有关的方程解的数值不稳定性。

    Apparatus and methods of data inversion

    公开(公告)号:US10042026B2

    公开(公告)日:2018-08-07

    申请号:US14414031

    申请日:2012-07-24

    申请人: Jing Li Songhua Chen

    发明人: Jing Li Songhua Chen

    摘要: Various embodiments include apparatus and methods to determine properties of a structure using data measurements on the structure. These measurements can be subjected to an inversion process that uses an optimization procedure conducted in a continuous function space. Additional apparatus, systems, and methods are disclosed.

    Multiphase meter to provide data for production management
    58.
    发明授权
    Multiphase meter to provide data for production management 有权
    多相电表提供生产管理数据

    公开(公告)号:US09335195B2

    公开(公告)日:2016-05-10

    申请号:US13028553

    申请日:2011-02-16

    摘要: A method and apparatus for determining a volume of a phase of a multiphase fluid flowing in a production tubular is provided. A magnetic field is imparted on the fluid to align nuclei of the multiphase fluid along a direction of the magnetic field. A radio frequency signal is transmitted into the multiphase fluid to excite the nuclei, and a signal is detected from the nuclei responsive to the transmitted radio frequency signal. An amplitude of the detected signal is determined and the volume of the phase flowing in the production tubular is determined using the determined amplitude and an amplitude of a calibration signal.

    摘要翻译: 提供了一种用于确定在生产管中流动的多相流体的相的体积的方法和装置。 在流体上施加磁场以使多相流体的核沿着磁场的方向对准。 将射频信号传输到多相流体中以激发核,并且响应于所发射的射频信号从核检测信号。 确定检测信号的幅度,并且使用所确定的校准信号的幅度和振幅来确定在生产管中流动的相的体积。

    NUCLEAR MAGNETIC RESONANCE LOGGING TOOL HAVING MULTIPLE PAD-MOUNTED ATOMIC MAGNETOMETERS
    59.
    发明申请
    NUCLEAR MAGNETIC RESONANCE LOGGING TOOL HAVING MULTIPLE PAD-MOUNTED ATOMIC MAGNETOMETERS 有权
    核磁共振记录工具,具有多个安装在一起的原子磁力计

    公开(公告)号:US20150054503A1

    公开(公告)日:2015-02-26

    申请号:US14377813

    申请日:2012-02-08

    IPC分类号: G01V3/32 G01R33/483

    摘要: Various disclosed nuclear magnetic resonance (NMR) logging systems and methods employ a plurality of NMR sensors, including atomic magnetometers, mounted on pads. Certain method embodiments include: utilizing the Earth magnetic field to pre-polarize the protons in a formation; utilizing a plurality of atomic magnetometers to obtain NMR measurements; and determining at least one characteristic relaxation time of the formation. The NMR sensor may optionally include a permanent magnet assembly.

    摘要翻译: 各种公开的核磁共振(NMR)测井系统和方法使用安装在焊盘上的多个NMR传感器,包括原子磁强计。 某些方法实施例包括:利用地球磁场对地层中的质子进行预极化; 利用多个原子磁强计获得NMR测量; 以及确定所述地层的至少一个特征弛豫时间。 NMR传感器可以可选地包括永磁体组件。