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46 条记录 (耗时 0.017 秒)

    Assessing downhole WBM-contaminated connate water
    44.
    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。

    Optical fluid analysis signal refinement
    45.
    发明授权
    Optical fluid analysis signal refinement 有权
    光学流体分析信号精细化

    公开(公告)号：US06992768B2

    公开(公告)日：2006-01-31

    申请号：US10249968

    申请日：2003-05-22

    申请人： Chengli Dong ,  Peter S. Hegeman ,  Oliver C. Mullins ,  Kai Hsu ,  Andrew L. Kurkjian ,  Andrew J. Carnegie

    发明人： Chengli Dong ,  Peter S. Hegeman ,  Oliver C. Mullins ,  Kai Hsu ,  Andrew L. Kurkjian ,  Andrew J. Carnegie

    IPC分类号： G01J3/46

    CPC分类号： E21B49/10 ,  G01N21/31 ,  G01N2021/3129

    摘要： A method for refining fluid sample data includes obtaining optical density data for a fluid sample in at least two color channels and at least one fluid component channel and determining a color-absorption function from the optical density data for the fluid sample in the at least two color channels. The method also includes calculating a portion of the optical density caused by color absorptions in each of the at least one fluid component channels, and de-coloring the optical density data in each of the at least one fluid component channels by removing the portion of the optical density data caused by color absorption.

    摘要翻译： 用于精炼流体样本数据的方法包括：获得至少两个颜色通道中的流体样本的光密度数据和至少一个流体分量通道，并根据来自至少两个中的流体样本的光密度数据确定颜色吸收函数 颜色通道。 所述方法还包括计算由所述至少一个流体分量通道中的每一个中的颜色吸收引起的光密度的一部分，以及通过去除所述至少一个流体分量通道中的每一个的所述至少一个流体分量通道中的所述光密度数据 由颜色吸收引起的光密度数据。

    Determining phase transition pressure of downhole retrograde condensate
    46.
    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。