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    Determining fluid composition downhole from optical spectra
    1.
    发明授权
    Determining fluid composition downhole from optical spectra 有权
    从光谱确定井下的流体组成

    公开(公告)号：US09334729B2

    公开(公告)日：2016-05-10

    申请号：US13644772

    申请日：2012-10-04

    申请人： Kentaro Indo ,  Kai Hsu ,  Julian Pop

    发明人： Kentaro Indo ,  Kai Hsu ,  Julian Pop

    IPC分类号： G01F7/00 ,  E21B49/10

    CPC分类号： E21B49/10 ,  E21B49/08

    摘要： Obtaining in-situ optical spectral data associated with a formation fluid flowing through a downhole formation fluid sampling apparatus, and predicting a parameter of the formation fluid flowing through the downhole formation fluid sampling apparatus based on projection of the obtained spectral data onto a matrix that corresponds to a predominant fluid type of the formation fluid.

    摘要翻译： 获得与流经井下地层流体采样装置的地层流体相关联的原位光谱数据，以及基于所获得的光谱数据投影到相应的矩阵上，预测流经井下地层流体取样装置的地层流体的参数 到地层流体的主要流体类型。

    METHODS AND APPARATUS TO DETERMINE PHASE-CHANGE PRESSURES
    4.
    发明申请
    METHODS AND APPARATUS TO DETERMINE PHASE-CHANGE PRESSURES 有权
    确定相变压力的方法和装置

    公开(公告)号：US20110093200A1

    公开(公告)日：2011-04-21

    申请号：US12582243

    申请日：2009-10-20

    申请人： Kai Hsu ,  Kentaro Indo ,  Peter S. Hegeman ,  Carsten Sonne

    发明人： Kai Hsu ,  Kentaro Indo ,  Peter S. Hegeman ,  Carsten Sonne

    IPC分类号： G01V5/04

    CPC分类号： G01N33/2823 ,  E21B47/10 ,  E21B49/082 ,  G01N7/14

    摘要： Example methods and apparatus to determine phase-change pressures are disclosed. A disclosed example method includes capturing a fluid in a chamber, pressurizing the fluid at a plurality of pressures, measuring a plurality of transmittances of a signal through the fluid at respective ones of the plurality of pressures, computing a first magnitude of a first subset of the plurality of transmittances, computing a second magnitude of a second subset of the plurality of transmittances, comparing the first and second magnitudes to determine a phase-change pressure for the fluid.

    摘要翻译： 公开了用于确定相变压力的示例性方法和装置。 所公开的示例性方法包括捕获腔室中的流体，在多个压力下对流体加压，在多个压力中的相应压力下测量通过流体的信号的多个透射率，计算第一子集的第一子集 所述多个透射率，计算所述多个透射率的第二子集的第二大小，比较所述第一和第二幅度以确定所述流体的相变压力。

    METHODS AND APPARATUS FOR DOWNHOLE CHARACTERIZATION OF EMULSION STABILITY
    5.
    发明申请
    METHODS AND APPARATUS FOR DOWNHOLE CHARACTERIZATION OF EMULSION STABILITY 有权
    用于乳化稳定性的井下特征的方法和装置

    公开(公告)号：US20110083842A1

    公开(公告)日：2011-04-14

    申请号：US12578425

    申请日：2009-10-13

    申请人： Kentaro Indo ,  Kai Hsu

    发明人： Kentaro Indo ,  Kai Hsu

    IPC分类号： E21B47/00 ,  G06F19/00

    CPC分类号： G01N33/2823 ,  E21B49/10 ,  E21B2049/085 ,  G01N21/534

    摘要： A method (and corresponding apparatus) for downhole fluid analysis of petroleum formation fluids. The method includes capturing in a chamber of a downhole tool at least two immiscible formation fluids in a generally segregated state (the fluids including petroleum), activating a fluid mixing means to mix the fluids in the chamber to create an emulsion therefrom, and allowing the emulsified fluids to segregate while measuring light transmittance through the segregating fluids in order to calculate a transition time period based on the light transmittance through the fluids in the chamber. The transition time period is preferably bounded by the time required for the light transmittance values measured by the light detector to reach a baseline light transmittance. The transition time period characterizes the stability of an emulsion formed by the captured fluids. The methods and apparatus can also be used for other fluid testing applications beyond downhole formation fluid testing.

    摘要翻译： 用于石油地层流体的井下流体分析的方法（和相应的装置）。 该方法包括在井下工具的腔室中捕获处于大体分离状态的至少两种不混溶的地层流体（包括石油的流体），激活流体混合装置以混合室中的流体以从其中产生乳液，并允许 乳化流体在通过分离流体测量透光率的同时分离，以便基于通过室中的流体的透光率来计算过渡时间段。 过渡时间段优选地由光检测器测量的光透射率值达到基线透光率所需的时间限制。 过渡时间表征由捕获的流体形成的乳液的稳定性。 该方法和装置也可以用于井下地层流体测试之外的其他流体测试应用。

    Method and system for measurement of reservoir fluid properties
    8.
    发明授权
    Method and system for measurement of reservoir fluid properties 有权
    储层流体特性测量方法和系统

    公开(公告)号：US09546959B2

    公开(公告)日：2017-01-17

    申请号：US13234621

    申请日：2011-09-16

    申请人： Kentaro Indo ,  Michael M. Toribio ,  Shu Pan

    发明人： Kentaro Indo ,  Michael M. Toribio ,  Shu Pan

    IPC分类号： G01N21/80 ,  G01N33/28 ,  E21B49/10 ,  G01N21/00 ,  E21B49/08

    CPC分类号： G01N21/80 ,  E21B49/10 ,  E21B2049/085 ,  G01N33/287

    摘要： A method and system that characterizes hydrogen sulfide in petroleum fluid employs a tool that includes a fluid analyzer for performing fluid analysis (including optical density (OD) for measuring carbon dioxide concentration) of a live oil sample, and a storage chamber for an analytical reagent fluidly coupled to a measurement chamber. An emulsion from fluid of the sample and the reagent is produced into the measurement chamber. The reagent changes color due to pH changes arising from chemical reactions between components of the sample and the reagent in the measurement chamber. The tool includes an optical sensor system that measures OD of a water phase of the emulsion at one or more determined wavelengths. The pH of the water phase is derived from such OD measurements. The pH of the water phase and the carbon dioxide concentration in the sample is used to calculate hydrogen sulfide concentration in the sample.

    摘要翻译： 表征石油流体中硫化氢的方法和系统采用了一种工具，该工具包括用于进行流体分析（包括用于测量二氧化碳浓度的光密度（OD））的流体分析仪和用于分析试剂的储存室 流体耦合到测量室。 将来自样品和试剂的流体的乳液制成测量室。 试剂由于样品组分与测量室中的试剂之间的化学反应引起的pH变化而改变颜色。 该工具包括光学传感器系统，该系统以一个或多个确定的波长测量乳液的水相的OD。 水相的pH来自这样的OD测量。 使用样品中水相的pH值和二氧化碳浓度来计算样品中的硫化氢浓度。

    Clean fluid sample for downhole measurements
    9.
    发明授权
    Clean fluid sample for downhole measurements 有权
    清洁流体样品进行井下测量

    公开(公告)号：US08434357B2

    公开(公告)日：2013-05-07

    申请号：US12543042

    申请日：2009-08-18

    申请人： Kai Hsu ,  Kentaro Indo ,  Sihar Marpaung ,  Kazumasa Kanayama ,  Peter S. Hegeman

    发明人： Kai Hsu ,  Kentaro Indo ,  Sihar Marpaung ,  Kazumasa Kanayama ,  Peter S. Hegeman

    IPC分类号： E21B49/10

    CPC分类号： E21B49/08 ,  E21B47/102 ,  E21B2049/085

    摘要： A system and method for obtaining a clean fluid sample for analysis in a downhole tool are provided. In one example, the method includes directing fluid from a main flowline of the downhole tool to a secondary flowline of the downhole tool. While the fluid is being directed into the secondary flowline, sensor responses corresponding to the fluid in the secondary flowline are monitored to determine when the sensor responses stabilize. The secondary flowline is isolated from the main flowline after the sensor responses have stabilized. A quality control procedure is performed on the fluid in the secondary flowline to determine whether the captured fluid is the same as the fluid in the main flowline. Additional fluid from the main flowline is allowed into the secondary flowline if the captured fluid is not the same.

    摘要翻译： 提供了一种用于在井下工具中获得用于分析的清洁流体样本的系统和方法。 在一个示例中，该方法包括将流体从井下工具的主流线引导到井下工具的次流线。 当流体被引导到二次流线中时，监测对应于次流线中的流体的传感器响应，以确定传感器响应何时稳定。 在传感器响应稳定后，二次流线与主流线隔离。 对二次流线中的流体执行质量控制程序，以确定捕获的流体是否与主流线中的流体相同。 如果捕获的流体不相同，来自主流线的附加流体被允许进入二次流线。

    METHOD AND SYSTEM FOR MEASUREMENT OF RESERVOIR FLUID PROPERTIES
    10.
    发明申请
    METHOD AND SYSTEM FOR MEASUREMENT OF RESERVOIR FLUID PROPERTIES 有权
    储层流体特性的测量方法和系统

    公开(公告)号：US20130071934A1

    公开(公告)日：2013-03-21

    申请号：US13234621

    申请日：2011-09-16

    申请人： Kentaro Indo ,  Michael M. Toribio ,  Shu Pan

    发明人： Kentaro Indo ,  Michael M. Toribio ,  Shu Pan

    IPC分类号： G01N21/80

    CPC分类号： G01N21/80 ,  E21B49/10 ,  E21B2049/085 ,  G01N33/287

    摘要： A method and system that characterizes hydrogen sulfide in petroleum fluid employs a tool that includes a fluid analyzer for performing fluid analysis (including optical density (OD) for measuring carbon dioxide concentration) of a live oil sample, and a storage chamber for an analytical reagent fluidly coupled to a measurement chamber. An emulsion from fluid of the sample and the reagent is produced into the measurement chamber. The reagent changes color due to pH changes arising from chemical reactions between components of the sample and the reagent in the measurement chamber. The tool includes an optical sensor system that measures OD of a water phase of the emulsion at one or more determined wavelengths. The pH of the water phase is derived from such OD measurements. The pH of the water phase and the carbon dioxide concentration in the sample is used to calculate hydrogen sulfide concentration in the sample.

    摘要翻译： 表征石油流体中硫化氢的方法和系统采用了一种工具，该工具包括用于进行流体分析（包括用于测量二氧化碳浓度的光密度（OD））的流体分析仪和用于分析试剂的储存室 流体耦合到测量室。 将来自样品和试剂的流体的乳液制成测量室。 试剂由于样品组分与测量室中的试剂之间的化学反应引起的pH变化而改变颜色。 该工具包括光学传感器系统，该系统以一个或多个确定的波长测量乳液的水相的OD。 水相的pH来自这样的OD测量。 使用样品中水相的pH值和二氧化碳浓度来计算样品中的硫化氢浓度。