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    • 32. 发明授权
    • Assessing downhole WBM-contaminated connate water
    • 评估井下WBM污染的合生水
    • US07028773B2
    • 2006-04-18
    • US10318800
    • 2002-12-13
    • Go FujisawaOliver C. MullinsChengli DongAndrew Kurkjian
    • Go FujisawaOliver C. MullinsChengli DongAndrew Kurkjian
    • E21B43/00G01V8/00
    • G01N21/645E21B47/1015E21B49/005E21B49/08E21B2049/085G01N33/241G01N33/2882
    • 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.
    • 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。
    • 34. 发明授权
    • Methods and apparatus to estimate fluid component volumes
    • 估计流体组分体积的方法和装置
    • US08813554B2
    • 2014-08-26
    • US13149901
    • 2011-06-01
    • Go FujisawaAndrew J. CarnegieJack H. HarfoushianSaifon Daungkaew SirimongkolkittiOliver C. Mullins
    • Go FujisawaAndrew J. CarnegieJack H. HarfoushianSaifon Daungkaew SirimongkolkittiOliver C. Mullins
    • E21B49/08
    • E21B49/081
    • Methods of and apparatus to estimate one or more volumes of one or more components of a fluid in a sample chamber of a downhole tool are described. An example method includes obtaining a sample chamber volume measurement, a flowline volume measurement and a supplemental volume measurement. The example method includes drawing the fluid into the sample chamber until the sample chamber is substantially full and measuring a characteristic of the fluid in the sample chamber at a first time to obtain a first characteristic measurement. The example method also includes adding a supplemental volume corresponding to the supplemental volume measurement to over-pressurize the sample chamber after measuring the characteristic at the first time and measuring the characteristic of the fluid in the sample chamber at a second time to obtain a second characteristic measurement. The second time is after the sample chamber is over-pressurized. In addition, the example method includes calculating a first volume of a first component of the one or more components of the fluid based on the first characteristic measurement, the second characteristic measurement, the sample chamber volume measurement, the flowline volume measurement and the supplemental volume measurement.
    • 描述了用于估计井下工具的样品室中的一种或多种流体的一种或多种组分的方法和装置。 示例性方法包括获得样品室体积测量,流线体积测量和补充体积测量。 该示例性方法包括将流体抽入样品室,直到样品室基本上满,并且在第一次测量样品室中的流体的特性以获得第一特征测量。 该示例方法还包括在第一次测量特征之后添加与补充体积测量相对应的补充体积,以在第二次测量样品室中的特性之后对样品室进行过压以获得第二特性 测量。 样品室第二次过压后。 此外,该示例性方法包括基于第一特征测量,第二特征测量,样本室体积测量,流量线测量和补充体积来计算流体的一个或多个分量的第一分量的第一体积 测量。