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    Downhole real-time filtrate contamination monitoring
    23.
    发明授权
    Downhole real-time filtrate contamination monitoring 有权

    公开(公告)号：US10738606B2

    公开(公告)日：2020-08-11

    申请号：US16411845

    申请日：2019-05-14

    Applicant: Schlumberger Technology Corporation

    Inventor： Youxiang Zuo ,  Kang Wang ,  Adriaan Gisolf ,  Ryan Sangjun Lee ,  Oliver C. Mullins ,  Shu Pan

    IPC: E21B49/08 ,  G01N33/28

    Abstract: A method includes identifying linearly behaving data within obtained data associated with fluid obtained from a subterranean formation. Shrinkage factor is determined based on the linearly behaving data. A function relating GOR data of the obtained fluid with the determined shrinkage factor is determined. A first linear relationship between optical density (OD) data of the obtained fluid and the function is determined. A second linear relationship between density data of the obtained fluid and the function is determined. An oil-based mud (OBM) filtrate contamination property of OBM filtrate within the obtained fluid based on the first linear relationship is determined. A native formation property of native formation fluid within the obtained fluid based on the second linear relationship is determined. A volume fraction of OBM filtrate contamination within the obtained fluid based on the OBM filtrate contamination property and the native formation property is estimated.

    SYSTEM AND METHOD FOR CONTROLLED PUMPING IN A DOWNHOLE SAMPLING TOOL
    24.
    发明申请
    SYSTEM AND METHOD FOR CONTROLLED PUMPING IN A DOWNHOLE SAMPLING TOOL 审中-公开

    公开(公告)号：US20200248549A1

    公开(公告)日：2020-08-06

    申请号：US16852905

    申请日：2020-04-20

    Applicant: Schlumberger Technology Corporation

    Inventor： Adriaan Gisolf ,  Nathan Landsiedel ,  Cosan Ayan ,  Kenneth Moelhoff

    IPC: E21B49/00 ,  E21B49/08

    Abstract: A downhole tool designed to be disposed in a borehole of a subterranean formation is provided. The downhole tool includes a probe used to interface with the subterranean formation in order to sample fluid from or to inject fluid into the subterranean formation. The downhole tool also includes a sample flowline fluidly coupled to the probe and used to direct fluid through the downhole tool. The downhole tool further includes at least two volume chambers. These volume chambers each include a first side fluidly coupled to the sample flowline, a second side fluidly coupled to the guard flowline, and a piston separating the first side from the second side. The downhole tool is able to control a flow of fluid from a high pressure environment to a low pressure environment via the at least two volume chambers, the sample flowline, and the guard flowline.

    Flow regime identification with filtrate contamination monitoring
    25.
    发明授权
    Flow regime identification with filtrate contamination monitoring 有权

    公开(公告)号：US10577928B2

    公开(公告)日：2020-03-03

    申请号：US14867262

    申请日：2015-09-28

    Applicant: Schlumberger Technology Corporation

    Inventor： Kang Wang ,  Youxiang Zuo ,  Ryan Sangjun Lee ,  Adriaan Gisolf

    IPC: E21B49/08

    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 a fluid that includes a native reservoir fluid of the geological formation and a contaminant. The method also includes receiving a portion of the fluid into the downhole acquisition tool, measuring a fluid property of the portion of the fluid using the downhole acquisition tool, and using the processor to estimate a fluid property of the native reservoir fluid based on the measured fluid property of the portion of the fluid and a regression model that may predict an asymptote of a growth curve. The asymptote corresponds to the estimated fluid property of the native formation fluid, and the regression model includes a geometric fitting model other than a power-law model.

    Inflatable Downhole Packer Tool
    26.
    发明申请
    Inflatable Downhole Packer Tool 审中-公开

    公开(公告)号：US20190323317A1

    公开(公告)日：2019-10-24

    申请号：US15957953

    申请日：2018-04-20

    Applicant: Schlumberger Technology Corporation

    Inventor： Stephen Parks ,  Juan Miguel La Rotta Marin ,  Adam Cygan ,  Adriaan Gisolf ,  Adame Kante ,  Thomas Pfeiffer

    IPC: E21B33/124

    Abstract: An inflatable packer assembly configured to be conveyed within a wellbore. The inflatable packer assembly includes a mandrel having a flowline, a first packer ring slidably connected with the mandrel, a second packer ring fixedly connected with the mandrel, a latching mechanism fluidly connected with the flowline, and an inflatable packer fluidly connected with the flowline. The inflatable packer may be disposed around the mandrel and sealingly connected with the first and second packer rings. The inflatable packer may be operable to expand against a sidewall of the wellbore upon receiving a fluid from the flowline. The latching mechanism may be operable to limit movement of the first packer ring with respect to the mandrel, and permit the movement of the first packer ring with respect to the mandrel upon being actuated by the fluid from the flowline.

    Applying shrinkage factor to real-time OBM filtrate contamination monitoring
    27.
    发明授权
    Applying shrinkage factor to real-time OBM filtrate contamination monitoring 有权

    公开(公告)号：US10352161B2

    公开(公告)日：2019-07-16

    申请号：US14975704

    申请日：2015-12-18

    Applicant: Schlumberger Technology Corporation

    Inventor： Youxiang Zuo ,  Adriaan Gisolf ,  Kang Wang ,  Ryan Sangjun Lee

    IPC: E21B49/10 ,  E21B47/12 ,  E21B49/08

    Abstract: A downhole tool operable to pump a volume of contaminated fluid from a subterranean formation during an elapsed pumping time while obtaining in-situ, real-time data associated with the contaminated fluid. The contaminated fluid includes native formation fluid and oil-based mud (OBM) filtrate. A shrinkage factor of the contaminated fluid is determined based on the in-situ, real-time data. The contaminated fluid shrinkage factor is fit relative to pumped volume or pumping time to obtain a function relating the shrinkage factor with pumped volume or elapsed pumping time. A shrinkage factor of the native formation fluid is determined based on the function. A shrinkage factor of the OBM filtrate is also determined. OBM filtrate volume percentage is determined based on the shrinkage factor of the native formation fluid and the shrinkage factor of the OBM filtrate.

    Systems and methods for controlling flow rate in a focused downhole acquisition tool
    29.
    发明授权
    Systems and methods for controlling flow rate in a focused downhole acquisition tool 有权

    公开(公告)号：US10294784B2

    公开(公告)日：2019-05-21

    申请号：US14956338

    申请日：2015-12-01

    Applicant: Schlumberger Technology Corporation

    Inventor： Adriaan Gisolf ,  Kai Hsu ,  Yong Chang ,  Youxiang Zuo ,  Ryan Sangjun Lee ,  Ashers Partouche

    IPC: E21B49/08 ,  E21B49/10 ,  G01N1/14 ,  E21B47/12

    Abstract: A method includes operating a downhole acquisition tool including a guard probe and a sample probe in a wellbore that contains a fluid that includes a native reservoir fluid and a contaminant. The method also includes receiving a first portion of fluid into the guard probe and a second portion of fluid into the sample probe, estimating a contamination level of the first or second portions based on a fluid property of the respective first and second portions, determining an initial guard flow rate of the first portion, determining an initial sample flow rate of the second portion, using a processor to adjust a guard flow rate of the second portion over pump time after the contamination level of the first portion is at or below a contamination level threshold, and adjust a sample flow rate of the first portion based on the adjusted guard flow rate and total flowrate.

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