公开(公告)号：US08136394B2

公开(公告)日：2012-03-20

申请号：US12425912

申请日：2009-04-17

申请人： Kai Hsu ,  Emmanuel Desroques ,  Kentaro Indo

发明人： Kai Hsu ,  Emmanuel Desroques ,  Kentaro Indo

IPC分类号： E21B49/10

CPC分类号： E21B49/088 ,  G01N33/2823

摘要： Methods and apparatuses for analyzing a downhole fluid are disclosed. An example method may involve the steps of admitting the downhole fluid in a test volume, controllably inducing a pressure change in the test volume based on at least one prescribed rate, measuring pressures in the test volume at a plurality of times, using the pressures measured at the plurality of times to determine a time at which an actual rate of the pressure change in the test volume deviates from the at least one prescribed rate, and detecting an occurrence of phase transition of the downhole fluid based on the determined time.

摘要翻译： 公开了用于分析井下流体的方法和装置。 示例性方法可以包括以下步骤：允许在测试体积中允许井下流体，基于至少一个规定的速率可控地引起测试体积中的压力变化，使用测量的压力测量多次测试体积中的压力 以确定试验体积中的压力变化的实际速率偏离所述至少一个规定速率的时间，并且基于所确定的时间来检测所述井下流体的相变的发生。

公开(公告)号：US20100263442A1

公开(公告)日：2010-10-21

申请号：US12425912

申请日：2009-04-17

申请人： Kai Hsu ,  Emmanuel Desroques ,  Kentaro Indo

发明人： Kai Hsu ,  Emmanuel Desroques ,  Kentaro Indo

IPC分类号： E21B47/08

CPC分类号： E21B49/088 ,  G01N33/2823

摘要： Methods and apparatuses for analyzing a downhole fluid are disclosed. An example method may involve the steps of admitting the downhole fluid in a test volume, controllably inducing a pressure change in the test volume based on at least one prescribed rate, measuring pressures in the test volume at a plurality of times, using the pressures measured at the plurality of times to determine a time at which an actual rate of the pressure change in the test volume deviates from the at least one prescribed rate, and detecting an occurrence of phase transition of the downhole fluid based on the determined time.

摘要翻译： 公开了用于分析井下流体的方法和装置。 示例性方法可以包括以下步骤：允许在测试体积中允许井下流体，基于至少一个规定的速率可控地引起测试体积中的压力变化，使用测量的压力测量多次测试体积中的压力 以确定试验体积中的压力变化的实际速率偏离所述至少一个规定速率的时间，并且基于所确定的时间来检测所述井下流体的相变的发生。

公开(公告)号：US08166812B2

公开(公告)日：2012-05-01

申请号：US12578587

申请日：2009-10-14

申请人： Emmanuel Desroques ,  Sophie Nazik Godefroy ,  Anthony Robert Holmes Goodwin ,  Christopher Harrison ,  Kai Hsu ,  Noriyuki Matsumoto

发明人： Emmanuel Desroques ,  Sophie Nazik Godefroy ,  Anthony Robert Holmes Goodwin ,  Christopher Harrison ,  Kai Hsu ,  Noriyuki Matsumoto

IPC分类号： E21B49/08 ,  G01N11/10 ,  G01N29/00

CPC分类号： G01N11/16 ,  E21B2049/085

摘要： Vibrating wire viscometers are disclosed. An example apparatus to determine the viscosity of a downhole fluid is described, the apparatus including a wire to be immersed in a downhole fluid, to vibrate when an alternating current is applied to the wire within a magnetic field, and to generate an electromotive force when vibrating within the magnetic field, the wire comprising a first resistance. The apparatus further includes a nulling circuit coupled to the wire, wherein the nulling circuit comprises a second resistance that is selectable to be substantially equal to the first resistance, and an analyzer coupled to the wire and the nulling circuit to determine the first resistance, the second resistance, and a viscosity of the downhole fluid based on the first and second resistances, at least one characteristic of the wire, and the electromotive force.

摘要翻译： 公开了振动丝粘度计。 描述了一种用于确定井下流体的粘度的示例性装置，该装置包括要浸入井下流体中的线，以在交变电流施加到磁场内的线时振动，并产生电动势， 在磁场内振动，线包括第一电阻。 所述装置还包括耦合到所述导线的归零电路，其中所述归零电路包括可选择为基本上等于所述第一电阻的第二电阻，以及耦合到所述导线和所述归零电路以确定所述第一电阻的分析器， 第二阻力和基于第一和第二电阻的井下流体的粘度，线的至少一个特性和电动势。

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。

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。

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。

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。

公开(公告)号：US20110042070A1

公开(公告)日：2011-02-24

申请号：US12543017

申请日：2009-08-18

申请人： Kai Hsu ,  Kentaro Indo ,  Oliver C. Mullins ,  Peter S. Hegeman

发明人： Kai Hsu ,  Kentaro Indo ,  Oliver C. Mullins ,  Peter S. Hegeman

IPC分类号： E21B49/08 ,  E21B47/00 ,  G06F19/00

CPC分类号： E21B49/087 ,  E21B47/102 ,  E21B49/08 ,  E21B2049/085

摘要： A system and method for determining at least one fluid characteristic of a downhole fluid sample using a downhole tool are provided. In one example, the method includes performing a calibration process that correlates optical and density sensor measurements of a fluid sample in a downhole tool at a plurality of pressures. The calibration process is performed while the fluid sample is not being agitated. At least one unknown value of a density calculation is determined based on the correlated optical sensor measurements and density sensor measurements. A second optical sensor measurement of the fluid sample is obtained while the fluid sample is being agitated. A density of the fluid sample is calculated based on the second optical sensor measurement and the at least one unknown value.

摘要翻译： 提供了一种用于使用井下工具确定井下流体样品的至少一种流体特性的系统和方法。 在一个示例中，该方法包括执行校准过程，其将多个压力下的井下工具中的流体样品的光学和密度传感器测量值相关联。 校准过程在流体样品未被搅动时进行。 基于相关的光学传感器测量和密度传感器测量确定密度计算的至少一个未知值。 在流体样品被搅动的同时获得液体样品的第二光学传感器测量。 基于第二光学传感器测量和至少一个未知值计算流体样本的密度。

公开(公告)号：US09275009B2

公开(公告)日：2016-03-01

申请号：US13596996

申请日：2012-08-28

申请人： Kai Hsu ,  Kentaro Indo ,  Sihar Marpaung ,  Peter S. Hegeman ,  Michael Toribio

发明人： Kai Hsu ,  Kentaro Indo ,  Sihar Marpaung ,  Peter S. Hegeman ,  Michael Toribio

IPC分类号： G06F17/00 ,  G01V13/00 ,  G01N33/28 ,  G01N7/16

CPC分类号： G06F17/00 ,  G01N7/16 ,  G01N33/2823 ,  G01V13/00

摘要： Variable volume systems and methods of use thereof described herein are capable of making calibrated determinations of fluid properties and phase behavior of a fluid sample. The determinations can be calibrated based on one or more calibration functions, such as system volume corrected for pressure and temperature variations. Cross-checking the results of measurements can be used to determine accuracy of the calibration or monitor for leaks or other anomalies of the variable volume systems. The variable volume systems can be implemented in a well logging tool and are capable of being calibrated downhole.

摘要翻译： 本文所述的可变体积系统及其使用方法能够对流体性质和流体样品的相位行为进行校准测定。 可以基于一个或多个校准功能来校准测定值，例如校正压力和温度变化的系统体积。 交叉检查测量结果可用于确定校准或监视器对可变体积系统的泄漏或其他异常的准确性。 可变容积系统可以在测井工具中实现，并且能够在井下校准。

公开(公告)号：US08335650B2

公开(公告)日：2012-12-18

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。