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    Determining phase transition pressure of downhole retrograde condensate
    1.
    发明申请
    Determining phase transition pressure of downhole retrograde condensate 有权
    确定井下逆行冷凝水的相变压力

    公开(公告)号：US20050067562A1

    公开(公告)日：2005-03-31

    申请号：US10670615

    申请日：2003-09-25

    申请人： Chengli Dong ,  Soraya Betancourt ,  Go Fujisawa ,  Oliver Mullins ,  James Dunlap

    发明人： Chengli Dong ,  Soraya Betancourt ,  Go Fujisawa ,  Oliver Mullins ,  James Dunlap

    IPC分类号： G01V8/02 ,  G01V8/00

    CPC分类号： G01V8/02

    摘要： The invention provides a method for determining phase transition pressure of downhole retrograde condensate. An OBM-contamination value is produced from a time-series of fluorescence values produced by measuring fluorescence emitted from a single-phase flow of OBM-contaminated formation fluid in a downhole cell during a cycle of time. The pressure of fluid in the cell is set at a transition boundary by incrementing drawdown pressure and monitoring the presence or absence of a phase transition. An apparent phase transition pressure value associated with the cycle of time is produced by setting apparent phase transition pressure value equal to cell pressure. This process is repeated for several cycles of time to produce a number of pairs of OBM-contamination value and apparent phase transition pressure value as OBM-contamination decreases over time. The value of phase transition pressure is determined by extrapolating from a representation of apparent phase transition pressure values versus OBM-contamination values.

    摘要翻译： 本发明提供一种确定井下逆行冷凝物相变压力的方法。 OBM污染值是通过在一段时间内通过测量从井下孔中的OBM污染的地层流体的单相流发射的荧光产生的时间序列产生的。 通过增加压降压力并监测相变的存在或不存在，将电池中的流体压力设定在过渡边界。 通过将表观相变压力值设置为等于电池压力来产生与时间周期相关的表观相变压力值。 该过程重复几个周期，以产生多个OBM污染值和表观相变压力值对，因为OBM污染随时间而减少。 通过从表观相变压力值与OBM污染值的表示进行外推来确定相变压力的值。

    Determining phase transition pressure of downhole retrograde condensate
    4.
    发明授权
    Determining phase transition pressure of downhole retrograde condensate 有权
    确定井下逆行冷凝水的相变压力

    公开(公告)号：US07075063B2

    公开(公告)日：2006-07-11

    申请号：US10670615

    申请日：2003-09-25

    申请人： Chengli Dong ,  Soraya S. Betancourt ,  Go Fujisawa ,  Oliver C. Mullins ,  James J. Dunlap

    发明人： Chengli Dong ,  Soraya S. Betancourt ,  Go Fujisawa ,  Oliver C. Mullins ,  James J. Dunlap

    IPC分类号： G01V8/00

    CPC分类号： G01V8/02

    摘要： The invention provides a method for determining phase transition pressure of downhole retrograde condensate. An OBM-contamination value is produced from a time-series of fluorescence values produced by measuring fluorescence emitted from a single-phase flow of OBM-contaminated formation fluid in a downhole cell during a cycle of time. The pressure of fluid in the cell is set at a transition boundary by incrementing drawdown pressure and monitoring the presence or absence of a phase transition. An apparent phase transition pressure value associated with the cycle of time is produced by setting apparent phase transition pressure value equal to cell pressure. This process is repeated for several cycles of time to produce a number of pairs of OBM-contamination value and apparent phase transition pressure value as OBM-contamination decreases over time. The value of phase transition pressure is determined by extrapolating from a representation of apparent phase transition pressure values versus OBM-contamination values.

    摘要翻译： 本发明提供一种确定井下逆行冷凝物相变压力的方法。 OBM污染值是通过在一段时间内通过测量从井下孔中的OBM污染的地层流体的单相流发射的荧光产生的荧光值的时间序列产生的。 通过增加压降压力并监测相变的存在或不存在，将电池中的流体压力设定在过渡边界。 通过将表观相变压力值设置为等于电池压力来产生与时间周期相关的表观相变压力值。 该过程重复几个周期，以产生多个OBM污染值和表观相变压力值对，因为OBM污染随时间而减少。 通过从表观相变压力值与OBM污染值的表示进行外推来确定相变压力的值。

    Assessing downhole WBM-contaminated connate water
    6.
    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
    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。

    Integrated formation modeling systems and methods
    10.
    发明授权
    Integrated formation modeling systems and methods 有权
    综合地层建模系统和方法

    公开(公告)号：US09366776B2

    公开(公告)日：2016-06-14

    申请号：US13295085

    申请日：2011-11-13

    申请人： ChengGang Xian ,  Chengli Dong ,  Oliver C. Mullins ,  Ricardo R. Vasques

    发明人： ChengGang Xian ,  Chengli Dong ,  Oliver C. Mullins ,  Ricardo R. Vasques

    IPC分类号： G01V1/28 ,  G01V1/50

    CPC分类号： G01V1/50 ,  G01V1/282 ,  G01V2210/61 ,  G01V2210/614

    摘要： Integrated formation modeling systems and methods are described. An example method of performing seismic analysis of a subterranean formation includes obtaining seismic data of the formation, obtaining fluid from the formation and analyzing at least some of the fluid to determine a fluid parameter. The example method additionally includes generating a model of the formation based at least on the seismic data and modifying the model based on the fluid parameter.

    摘要翻译： 描述了综合地层建模系统和方法。 执行地下地层的地震分析的示例性方法包括获得地层的地震数据，从地层获得流体并分析至少一些流体以确定流体参数。 该示例性方法还包括至少基于地震数据生成地层模型并基于流体参数修改模型。