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    METHODS AND APPARATUS FOR THE DOWNHOLE CHARACTERIZATION OF FORMATION FLUIDS
    5.
    发明申请
    METHODS AND APPARATUS FOR THE DOWNHOLE CHARACTERIZATION OF FORMATION FLUIDS 有权
    用于形成流体的井下特征的方法和装置

    公开(公告)号：US20070119244A1

    公开(公告)日：2007-05-31

    申请号：US11615381

    申请日：2006-12-22

    申请人： Anthony Goodwin ,  Pete Hegeman ,  Kai Hsu ,  Chengli Dong

    发明人： Anthony Goodwin ,  Pete Hegeman ,  Kai Hsu ,  Chengli Dong

    IPC分类号： E21B49/08

    CPC分类号： E21B47/10 ,  E21B49/08 ,  E21B49/10 ,  G01N1/12 ,  G01N7/00 ,  G01N9/36 ,  G01N25/04 ,  G01N33/2823

    摘要： Methods and apparatus for investigating a hydrocarbon bearing geological formation traversed by a borehole are disclosed. An example method to characterize a fluid associated with an underground geological formation obtains a sample of the fluid associated with the underground geological formation. The example method measures, in a borehole associated with the underground geological formation, a chemical composition and a thermophysical property of the sample of the fluid. The example method selects a mathematical model to represent the sample of the fluid based on at least one of the chemical composition or the thermophysical property and adjusts a parameter of the mathematical model based on at least one of the chemical composition or the thermophysical property to generate an adjusted mathematical model. The example method then determines a property of the fluid associated with the underground geological formation based on the adjusted mathematical model.

    摘要翻译： 公开了用于研究由钻孔穿过的含烃地质地层的方法和装置。 用于表征与地下地质构造有关的流体的示例性方法获得与地下地质构造相关联的流体的样本。 示例性方法在与地下地质构造相关的钻孔中测量流体样品的化学成分和热物理性质。 该示例性方法基于化学组成或热物理性质中的至少一个选择数学模型来表示流体的样本，并且基于化学组成或热物理性质中的至少一个来调整数学模型的参数以产生 一个调整后的数学模型。 然后，示例性方法基于经调整的数学模型确定与地下地质构造相关联的流体的性质。

    Determining dew precipitation and onset pressure in oilfield retrograde condensate
    8.
    发明授权
    Determining dew precipitation and onset pressure in oilfield retrograde condensate 有权
    确定油田逆行冷凝水中的露水沉淀和起始压力

    公开(公告)号：US07002142B2

    公开(公告)日：2006-02-21

    申请号：US10309850

    申请日：2002-12-03

    申请人： Oliver C. Mullins ,  Go Fujisawa ,  Chengli Dong ,  Andrew Kurkjian ,  John Nighswander ,  Toru Terabayashi ,  Satoko Yoshida ,  Hideki Kinjo ,  Henning Groenzin

    发明人： Oliver C. Mullins ,  Go Fujisawa ,  Chengli Dong ,  Andrew Kurkjian ,  John Nighswander ,  Toru Terabayashi ,  Satoko Yoshida ,  Hideki Kinjo ,  Henning Groenzin

    IPC分类号： G01V8/00

    CPC分类号： E21B49/084 ,  E21B47/1015 ,  E21B49/005 ,  E21B49/10 ,  G01N21/64 ,  G01N33/241 ,  G01N33/2823

    摘要： A method and apparatus detects dew precipitation and determines dew precipitation onset pressure in a sample of formation fluid located downhole in an oilfield reservoir. In a preferred embodiment, the method includes (a) isolating a sample of formation fluid downhole; (b) illuminating the sample downhole with fluorescence excitation light; (c) measuring at least one characteristic of fluorescence short from the sample; (d) reducing pressure on the sample; (e) repeating steps (b) to (d); (f) detecting dew precipitation when a change is detected in a parameter that is a function of the at least one characteristic of fluorescence emission; and (g) setting dew precipitation onset pressure equal to pressure on the sample when the change in the parameter is detected. The parameter preferably is a function of fluorescence intensity and fluorescence red shift, and the change is an increase in fluorescence intensity and detection of fluorescence red shift. Also, the function includes a ratio of a measured intensity at a first wavelength to a reference intensity, and the reference intensity is a function of a measured intensity at a second wavelength.

    摘要翻译： 方法和装置检测露点沉淀，并确定位于油田储层中井下的地层流体样品中的露水沉淀开始压力。 在一个优选实施例中，该方法包括（a）在井下分离地层流体样品; （b）用荧光激发光照射井下样品; （c）从所述样品测量至少一种荧光短的特征; （d）降低样品压力; （e）重复步骤（b）至（d）; （f）当在作为荧光发射的至少一个特征的函数的参数中检测到变化时，检测露水沉淀; 和（g）当检测到参数变化时，将露珠沉淀开始压力设定为等于样品上的压力。 该参数优选是荧光强度和荧光红移的函数，并且荧光强度的变化和荧光红移的检测变化。 此外，该功能包括第一波长处的测量强度与参考强度的比率，并且参考强度是第二波长处的测量强度的函数。

    Phase separation detection in downhole fluid sampling
    10.
    发明授权
    Phase separation detection in downhole fluid sampling 有权
    井下液相采样中的相分离检测

    公开(公告)号：US08528396B2

    公开(公告)日：2013-09-10

    申请号：US12363835

    申请日：2009-02-02

    申请人： Xu Wu ,  Tsutomu Yamate ,  Toru Terabayashi ,  Ricardo Vasques ,  Chengli Dong ,  Peter S. Hegeman

    发明人： Xu Wu ,  Tsutomu Yamate ,  Toru Terabayashi ,  Ricardo Vasques ,  Chengli Dong ,  Peter S. Hegeman

    IPC分类号： E21B49/08

    CPC分类号： E21B49/082

    摘要： Example methods and apparatus to detect phase separation in downhole fluid sampling operations are disclosed. An example method to detect a phase separation condition of a fluid from a subterranean involves obtaining a sample of the fluid, measuring a first characteristic value of the sample, measuring a second characteristic value of the sample and comparing the first characteristic value to a first reference value associated with a single-phase condition of the fluid to generate a corresponding first comparison result. The example method then compares the second characteristic value to a second reference value associated with the single-phase condition of the fluid to generate a corresponding second comparison result and detects the phase separation condition of the fluid based on the first and second comparison results.

    摘要翻译： 公开了用于检测井下液体取样操作中的相分离的示例性方法和装置。 用于检测来自地下的流体的相分离条件的示例性方法包括获得流体样品，测量样品的第一特征值，测量样品的第二特征值，并将第一特征值与第一参考值进行比较 值与流体的单相条件相关联以产生相应的第一比较结果。 该示例方法然后将第二特征值与与流体的单相条件相关联的第二参考值进行比较，以产生相应的第二比较结果，并基于第一和第二比较结果检测流体的相分离条件。