Downhole Fluid Analysis Method And Apparatus For Determining Hydrogen Indexes
    61.
    发明申请
    Downhole Fluid Analysis Method And Apparatus For Determining Hydrogen Indexes 审中-公开
    用于确定氢指数的井下流体分析方法和装置

    公开(公告)号:US20150047835A1

    公开(公告)日:2015-02-19

    申请号:US14460253

    申请日:2014-08-14

    CPC classification number: E21B49/08 E21B47/102

    Abstract: The present disclosure relates to determining hydrogen indexes of downhole fluids using fluid composition data. In certain embodiments, the type of the fluid, such as gas, water, or oil, may be determined downhole and used to select a method for determining the hydrogen index of the fluid. The selected method may then be employed while the tool is downhole to calculate the hydrogen index of the fluid.

    Abstract translation: 本公开涉及使用流体组成数据确定井下流体的氢指数。 在某些实施方案中,可以在井下确定流体(例如气体,水或油)的类型,并用于选择用于确定流体的氢指数的方法。 然后可以使用所选择的方法,同时工具在井下以计算流体的氢指数。

    Asphaltene Content of Heavy Oil
    62.
    发明申请
    Asphaltene Content of Heavy Oil 有权
    重油沥青质含量

    公开(公告)号:US20150000902A1

    公开(公告)日:2015-01-01

    申请号:US14371987

    申请日:2013-01-11

    CPC classification number: E21B49/00 E21B47/102 E21B49/081 E21B49/10

    Abstract: A downhole tool is conveyed within a borehole extending into a subterranean formation. Fluid is drawn from the subterranean formation into the downhole tool, wherein the fluid comprises heavy oil. Fluorescence intensity of the drawn fluid is measured via a sensor of the downhole tool, and asphaltene content of the drawn fluid is estimated based on the measured fluorescence intensity.

    Abstract translation: 钻井工具在延伸到地下地层的井眼内传送。 流体从地层被抽入井下工具,其中流体包括重油。 通过井下工具的传感器测量拉伸流体的荧光强度,并且基于测量的荧光强度来估计拉伸流体的沥青质含量。

    Oil Based Drilling Mud Filtrate Contamination Monitoring Using Gas To Oil Ratio
    63.
    发明申请
    Oil Based Drilling Mud Filtrate Contamination Monitoring Using Gas To Oil Ratio 有权
    油基钻井泥浆滤液污染监测使用气油比

    公开(公告)号:US20140316705A1

    公开(公告)日:2014-10-23

    申请号:US13865839

    申请日:2013-04-18

    CPC classification number: G01V8/10 E21B49/088 G01N33/2823

    Abstract: A method for monitoring oil based mud filtrate contamination is provided including steps of analytically dividing a fluid stream into two parts, determining a gas/oil ratio for a native fluid determining an apparent gas/oil ratio for the contaminated fluid and determining on a volume fraction, an oil based contamination level based upon the gas/oil ratio for the native fluid and the apparent gas/oil ratio for the contaminated fluid.

    Abstract translation: 提供了一种用于监测油基泥浆滤液污染物的方法,包括将流体流分解为两部分的步骤,确定用于确定污染流体的表观气/油比的天然流体的气/油比,并确定体积分数 ,基于天然流体的气/油比的油基污染水平和污染流体的表观气/油比。

    Estimating contamination during focused sampling

    公开(公告)号:US10975693B2

    公开(公告)日:2021-04-13

    申请号:US16677040

    申请日:2019-11-07

    Abstract: Disclosed are methods and apparatus pertaining to processing in-situ, real-time data associated with fluid obtained by a downhole sampling tool. The processing includes generating a population of values for Ĉ, where each value of Ĉ is an estimated value of a fluid property for native formation fluid within the obtained fluid. The obtained data is iteratively fit to a predetermined model in linear space. The model relates the fluid property to pumpout volume or time. Each iterative fitting utilizes a different one of the values for Ĉ. A value Ĉ* is identified as the one of the values Ĉ that minimizes model fit error in linear space based on the iterative fitting. Selected values Ĉ that are near Ĉ* are then assessed to determine which one has a minimum integral error of nonlinearity in logarithmic space.

    Downhole filtrate contamination monitoring

    公开(公告)号:US10585082B2

    公开(公告)日:2020-03-10

    申请号:US15135411

    申请日:2016-04-21

    Abstract: A method includes operating a downhole acquisition tool in a wellbore in a geological formation. The wellbore or the geological formation, or both, contains first fluid that includes a native reservoir fluid of the geological formation and a contaminant. The method also includes receiving a portion of the first fluid into the downhole acquisition tool and determining a plurality of properties of the portion of the first fluid using the downhole acquisition tool. The plurality of properties includes a mass fraction of a component of the portion of the first fluid and a density of the portion of the first fluid. The method also includes using the processor to estimate a volume fraction of the contaminant in the portion of the first fluid based at least in part on a composition mass fraction function that depends at least on the mass fraction of the component in the portion of the first fluid and the density of the portion of the first fluid.

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