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    Methods and apparatus of downhole fluid analysis
    2.
    发明申请
    Methods and apparatus of downhole fluid analysis 有权
    井下液分析方法与装置

    公开(公告)号：US20060243047A1

    公开(公告)日：2006-11-02

    申请号：US11203932

    申请日：2005-08-15

    申请人： Toru Terabayashi ,  Akihito Chikenji ,  Tsutomu Yamate ,  Oliver Mullins ,  Andrew Kurkjian ,  Hani Elshahawi

    发明人： Toru Terabayashi ,  Akihito Chikenji ,  Tsutomu Yamate ,  Oliver Mullins ,  Andrew Kurkjian ,  Hani Elshahawi

    IPC分类号： E21B47/08

    CPC分类号： G01N9/36 ,  E21B49/10 ,  G01N2011/006

    摘要： Methods and apparatus for downhole analysis of formation fluids by isolating the fluids from the formation and/or borehole in a pressure and volume control unit that is integrated with a flowline of a fluid analysis module and determining fluid characteristics of the isolated fluids. Parameters of interest may be derived for formation fluids in a static state and undesirable formation fluids may be drained and replaced with formation fluids that are suitable for downhole characterization or surface sample extraction. Isolated formation fluids may be circulated in a loop of the flowline for phase behavior characterization. Real-time analysis of the fluids may be performed at or near downhole conditions.

    摘要翻译： 通过将压力和体积控制单元中的流体从地层和/或钻孔中分离出来并与流体分析模块的流线集成并确定分离流体的流体特性，来对地层流体进行井下分析的方法和装置。 可以为处于静态的地层流体导出感兴趣的参数，并且可以排出不希望的地层流体并用适于井下表征或表面样品提取的地层流体替代。 隔离的地层流体可以在流动管线的环路中循环以进行相位行为表征。 流体的实时分析可以在井下或近井条件下进行。

    Apparatus and method for formation evaluation
    4.
    发明申请
    Apparatus and method for formation evaluation 有权
    地层评价装置及方法

    公开(公告)号：US20060137873A1

    公开(公告)日：2006-06-29

    申请号：US11021849

    申请日：2004-12-23

    申请人： Derek Caudwell ,  Anthony Goodwin ,  Martin Trusler ,  Michael Frels ,  Kai Hsu ,  Jonathan Brown ,  Julian Pop ,  Bunker Hill ,  Andrew Kurkjian

    发明人： Derek Caudwell ,  Anthony Goodwin ,  Martin Trusler ,  Michael Frels ,  Kai Hsu ,  Jonathan Brown ,  Julian Pop ,  Bunker Hill ,  Andrew Kurkjian

    IPC分类号： E21B49/08

    CPC分类号： G01N11/16 ,  E21B49/10

    摘要： A viscometer for a down hole tool positionable in a well bore penetrating a subterranean formation is described. The formation contains at least one fluid therein. The down hole tool is adapted to convey at least a portion of the fluid to the viscometer. The viscometer comprises a sensor unit, and at least one magnet. The sensor unit is positionable within the down hole tool and comprises at least two spatially disposed clamps and a wire suspended in tension between the at least two clamps such that the wire is available for interaction with the fluid when the viscometer is positioned within the down hole tool and the down hole tool is positioned within the subterranean formation and receives the fluid from the subterranean formation.

    摘要翻译： 描述了一种位于穿透地层的井眼中的井下工具的粘度计。 地层中含有至少一种流体。 井下工具适于将至少一部分流体输送到粘度计。 粘度计包括传感器单元和至少一个磁体。 传感器单元可定位在井下工具内，并且包括至少两个空间设置的夹具和在至少两个夹子之间张紧地悬挂的线材，使得当粘度计位于下孔内时，该线材可用于与流体相互作用 工具，井下工具位于地下地层内并从地下地层接收流体。

    Reduced contamination sampling
    5.
    发明授权
    Reduced contamination sampling 有权

    公开(公告)号：US06659177B2

    公开(公告)日：2003-12-09

    申请号：US09960570

    申请日：2001-09-20

    申请人： Victor M. Bolze ,  Jonathan Brown ,  Andrew Kurkjian

    发明人： Victor M. Bolze ,  Jonathan Brown ,  Andrew Kurkjian

    IPC分类号： E21B4908

    CPC分类号： E21B49/082 ,  E21B49/081

    摘要： A sample module for use in a downhole tool includes a sample chamber for receiving and storing pressurized fluid. A piston is slidably disposed in the chamber to define a sample cavity and a buffer cavity, and the cavities have variable volumes determined by movement of the piston. A first flowline is provided for communicating fluid obtained from a subsurface formation through the sample module. A second flowline connects the first flowline to the sample cavity, and a third flowline connects the first flowline to the buffer cavity for communicating buffer fluid out of the buffer cavity. A first valve capable of moving between a closed position and an open position is disposed in the second flowline for communicating flow of fluid from the first flowline to the sample cavity. When the first valve is in the open position, the sample cavity and the buffer cavity are in fluid communication with the first flowline and therefore have equivalent pressures.

    Earth formation pressure measurement with penetrating probe
    6.
    发明授权
    Earth formation pressure measurement with penetrating probe 有权
    用穿透式探头测量地层压力

    公开(公告)号：US06164126A

    公开(公告)日：2000-12-26

    申请号：US173107

    申请日：1998-10-15

    申请人： Reinhart Ciglenec ,  Andrew Kurkjian

    发明人： Reinhart Ciglenec ,  Andrew Kurkjian

    IPC分类号： E21B49/00 ,  E21B47/06 ,  E21B49/10 ,  E21B47/10

    CPC分类号： E21B49/10

    摘要： The present invention relates to an apparatus and method for measuring a property of a subsurface formation intersected by a wellbore, which contemplate the use of a tool body adapted for movement through the wellbore. Actuating means is carried by the tool body, and a probe is propelled by the actuating means for movement of the probe between a retracted position within the wellbore and an extended position penetrating a wall of the wellbore such that the probe engages the formation. The probe is adapted for substantially producing a seal at the wall of the wellbore as the probe is moved to the extended position, and the probe has means therein for measuring the property of the formation engaged by the probe.

    摘要翻译： 本发明涉及一种用于测量与井筒相交的地下地层的性质的装置和方法，其考虑使用适于通过井眼移动的工具主体。 致动装置由工具主体承载，并且探头由致动装置推动，用于使探头在井眼内的缩回位置和穿透井壁的壁的延伸位置之间移动，使得探针接合地层。 当探头移动到延伸位置时，探头适于在井眼的壁处基本上产生密封，并且探针具有用于测量由探针接合的地层的性质的装置。

    Assessing downhole WBM-contaminated connate water
    8.
    发明授权
    Assessing downhole WBM-contaminated connate water 有权
    评估井下WBM污染的合生水

    公开(公告)号：US07028773B2

    公开(公告)日：2006-04-18

    申请号：US10318800

    申请日：2002-12-13

    申请人： Go Fujisawa ,  Oliver C. Mullins ,  Chengli Dong ,  Andrew Kurkjian

    发明人： Go Fujisawa ,  Oliver C. Mullins ,  Chengli Dong ,  Andrew Kurkjian

    IPC分类号： E21B43/00 ,  G01V8/00

    CPC分类号： G01N21/645 ,  E21B47/1015 ,  E21B49/005 ,  E21B49/08 ,  E21B2049/085 ,  G01N33/241 ,  G01N33/2882

    摘要： Water-based mud filtrate concentration in a downhole fluid sample drawn from the borehole of an oil well is assessed. To measure water-based mud filtrate concentration, a water-based mud having a water-soluble fluorescent dye tracer is pumped into the borehole; sample fluid from a selected downhole location is pumped through a downhole flow line having a window; sample fluid flowing in an excitation region of the downhole flow line is illuminated through the window with fluorescence excitation light; and fluorescence emission from the excitation region is measured to produce a measured value. The measured value represents the fraction of water-based mud filtrate in the sample fluid. A calibration value is determined representing 100% water-based mud filtrate. A method for validating a sample of connate water as having an acceptably low WBM filtrate contamination tests for validation downhole, in real time. Each measured value of the series of measured values is compared with a predetermined fraction of a calibration value. Samples that are validated may be captured and brought to the surface for analysis. A method using the time series data and a predetermined fraction of the calibration value calculates a predicted flushing time to completion.

    摘要翻译： 评估从油井钻孔抽取的井下流体样品中的水基泥浆滤液浓度。 为了测量水泥泥滤液浓度，将具有水溶性荧光染料示踪剂的水性泥浆泵入井眼; 来自所选择的井下位置的样品流体被泵送通过具有窗口的井下流动管线; 在井下流动线的激发区域流动的样品流体通过窗口用荧光激发光照射; 并且测量来自激发区域的荧光发射以产生测量值。 测量值表示样品液中水基泥浆滤液的分数。 确定代表100％水基泥浆滤液的校准值。 一种用于验证原生水样品具有可接受的低WBM滤液污染测试的方法，用于实时验证井下。 将一系列测量值的每个测量值与校准值的预定分数进行比较。 经过验证的样品可能被捕获并带到表面进行分析。 使用时间序列数据和校准值的预定分数的方法计算完成的预测冲洗时间。

    Determining dew precipitation and onset pressure in oilfield retrograde condensate
    10.
    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。