Time-domain data integration of multiple gradient, multiple TE echo trains
    41.
    发明授权
    Time-domain data integration of multiple gradient, multiple TE echo trains 有权
    多个梯度,多个TE回波列车的时域数据集成

    公开(公告)号:US06859034B2

    公开(公告)日:2005-02-22

    申请号:US10435419

    申请日:2003-05-09

    申请人: Songhua Chen

    发明人: Songhua Chen

    IPC分类号: G01R33/44 G01V3/32 G01V3/00

    CPC分类号: G01V3/32 G01N24/081

    摘要: When NMR spin echo measurements are obtained with one or more of (i) different echo intervals, (ii) different static field gradients, (iii) different polarization times, or (iv) noise levels, due to fluid diffusivity, the spin echo measurements cannot be simply combined. However, by applying a correction factor, such a combination is possible, giving an improved interpretation of the formation properties.

    摘要翻译: 当使用(i)不同的回波间隔,(ii)不同的静态场梯度,(iii)不同的极化时间或(iv)由于流体扩散性而产生的噪声水平时,自旋回波测量 不能简单地组合。 然而,通过应用校正因子,这种组合是可能的,给出了对形成性质的改进的解释。

    Method for processing NMR data without phase-alternating-pair (PAP) averaging
    42.
    发明授权
    Method for processing NMR data without phase-alternating-pair (PAP) averaging 失效
    无相位交替对(PAP)平均处理NMR数据的方法

    公开(公告)号:US06388441B1

    公开(公告)日:2002-05-14

    申请号:US09691514

    申请日:2000-10-18

    申请人: Songhua Chen

    发明人: Songhua Chen

    IPC分类号: G01R300

    摘要: NMR data are acquired using a phase-alternation of the tipping pulse. Differences between consecutive samples acquired with same or different frequencies are determined and an average value of the differences is determined over a sample window and over a range of echoes. This average value, determined separately for the in-phase and quadrature component data is a measure of the systematic noise and may be applied to the in-phase and quadrature component data to give corrected data with a higher resolution than prior art methods of processing phase alternated pulse sequence data. The method may also be used to improve the resolution of multifrequency NMR data acquired with a gradient logging tool.

    摘要翻译: 使用倾翻脉冲的相位交替获取NMR数据。 确定以相同或不同频率获得的连续样本之间的差异,并且在样本窗口上和在一定范围的回波上确定差异的平均值。 对于同相和正交分量数据分别确定的该平均值是系统噪声的量度,并且可以应用于同相和正交分量数据,以给出比现有技术的处理阶段方法更高的分辨率的校正数据 交替脉冲序列数据。 该方法还可以用于提高用梯度测井工具获取的多频度NMR数据的分辨率。

    APPARATUS AND METHODS OF DATA INVERSION
    43.
    发明申请
    APPARATUS AND METHODS OF DATA INVERSION 审中-公开
    数据转换的装置和方法

    公开(公告)号:US20150177352A1

    公开(公告)日:2015-06-25

    申请号:US14414031

    申请日:2012-07-24

    申请人: Jing Li Songhua Chen

    发明人: Jing Li Songhua Chen

    IPC分类号: G01R33/54

    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.

    摘要翻译: 各种实施例包括使用结构上的数据测量来确定结构的属性的装置和方法。 这些测量可以进行使用在连续功能空间中进行的优化程序的反演处理。 公开了附加装置,系统和方法。

    Method for correcting NMR and nuclear logs in formate mud filtrate invaded formations
    44.
    发明授权
    Method for correcting NMR and nuclear logs in formate mud filtrate invaded formations 有权
    用于校正甲酸泥滤液侵入地层中NMR和核原子的方法

    公开(公告)号:US08866475B2

    公开(公告)日:2014-10-21

    申请号:US13289094

    申请日:2011-11-04

    IPC分类号: G01V3/32 E21B49/08 G01N24/08

    CPC分类号: G01V3/32 E21B49/08 G01N24/081

    摘要: A method of calculating a porosity of a geological formation includes determining a bulk pore volume and a movable fluid pore volume in the geological formation in which drilling mud including a mud filtrate is introduced, calculating a porosity of the formation based on a bulk pore volume, and correcting the porosity based on the movable fluid volume in the geological formation.

    摘要翻译: 计算地质构造孔隙度的方法包括确定地质构造中的体积孔体积和可移动流体孔隙体积,其中引入包括泥浆滤液的钻井泥浆,基于体积孔体积计算地层的孔隙率, 并且基于地质层中的可移动流体体积校正孔隙率。

    PRECISION MARKING OF SUBSURFACE LOCATIONS
    45.
    发明申请
    PRECISION MARKING OF SUBSURFACE LOCATIONS 有权
    地理位置的精确标记

    公开(公告)号:US20120234533A1

    公开(公告)日:2012-09-20

    申请号:US13048473

    申请日:2011-03-15

    申请人: Songhua Chen

    发明人: Songhua Chen

    IPC分类号: E21B47/00 E21B31/06

    摘要: A method for performing a downhole operation includes marking at least one location in a wellbore using a magnetized material. The magnetized material may generate a magnetic field stronger than a magnetic field generated in the wellbore by a surrounding formation.

    摘要翻译: 用于执行井下操作的方法包括使用磁化材料在井眼中标记至少一个位置。 磁化材料可以产生比通过周围地层在井筒中产生的磁场更强的磁场。

    Multiphase Flow Measurement Using Nuclear Magnetic Resonance
    46.
    发明申请
    Multiphase Flow Measurement Using Nuclear Magnetic Resonance 有权
    使用核磁共振的多相流测量

    公开(公告)号:US20120092006A1

    公开(公告)日:2012-04-19

    申请号:US12907707

    申请日:2010-10-19

    IPC分类号: G01R33/44

    摘要: A method and apparatus for estimating a flow rate of a phase of a multiphase fluid is disclosed. A first velocity distribution is obtained for a first set of nuclei in the fluid from a Nuclear Magnetic Resonance (NMR) signal received for the fluid in response to a first NMR excitation signal. A second velocity distribution is obtained for a second set of nuclei in the fluid from an NMR signal received for the fluid in response to a second NMR excitation signal. A velocity of the phase is estimated from the first velocity distribution and the second velocity distribution. The flow rate of the phase is estimated using the estimated velocity of the phase and an estimated volume fraction of the phase.

    摘要翻译: 公开了一种用于估计多相流体的相的流量的方法和装置。 对于针对第一个NMR激发信号的流体接收的核磁共振(NMR)信号,对于流体中的第一组核获得第一速度分布。 从针对第二次NMR激发信号的流体接收到的NMR信号,获得流体中第二组核的第二速度分布。 从第一速度分布和第二速度分布估计相位的速度。 使用相的估计速度和相的估计体积分数来估计相的流速。

    Automatic adjustment of NMR pulse sequence to optimize SNR based on real time analysis
    48.
    发明授权
    Automatic adjustment of NMR pulse sequence to optimize SNR based on real time analysis 有权
    自动调整NMR脉冲序列,以实时分析优化SNR

    公开(公告)号:US07565833B2

    公开(公告)日:2009-07-28

    申请号:US11782212

    申请日:2007-07-24

    IPC分类号: E21B49/00 G01V3/14

    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摘要的规则,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
    49.
    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
    50.
    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。