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    Downhole real-time filtrate contamination monitoring
    13.
    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.

    Tar mat formation prediction in late-charge reservoirs
    17.
    发明授权
    Tar mat formation prediction in late-charge reservoirs 有权

    公开(公告)号：US10392936B2

    公开(公告)日：2019-08-27

    申请号：US15279828

    申请日：2016-09-29

    Applicant: Schlumberger Technology Corporation

    Inventor： Shu Pan ,  Youxiang Zuo ,  Yi Chen ,  Kang Wang ,  Oliver C. Mullins

    IPC: E21B43/00 ,  E21B49/08 ,  E21B49/10 ,  G01V11/00 ,  G06F17/10 ,  G01V7/00

    Abstract: A downhole tool, surface equipment, and/or remote equipment are utilized to obtain data associated with a subterranean hydrocarbon reservoir, fluid contained therein, and/or fluid obtained therefrom. At least one condition indicating that a density inversion exists in the fluid contained in the reservoir is identified from the data. Molecular sizes of fluid components contained within the reservoir are estimated from the data. A model of the density inversion is generated based on the data and molecular sizes. The density inversion model is utilized to estimate the density inversion amount and depth and time elapsed since the density inversion began to form within the reservoir. A model of a gravity-induced current of the density inversion is generated based on the data and the density inversion amount, depth, and elapsed time.

    Reservoir fluid geodynamics system and method
    18.
    发明授权
    Reservoir fluid geodynamics system and method 有权

    公开(公告)号：US10358919B2

    公开(公告)日：2019-07-23

    申请号：US15428534

    申请日：2017-02-09

    Applicant: Schlumberger Technology Corporation

    Inventor： Youxiang Zuo ,  Shu Pan ,  Kang Wang ,  Oliver Mullins ,  Ashers Partouche

    IPC: E21B49/08 ,  G01V99/00

    Abstract: A method includes placing a downhole acquisition tool in a wellbore in a geological formation within a hydrocarbon reservoir that contains a reservoir fluid. The method also includes performing downhole fluid analysis using the downhole acquisition tool in the wellbore to determine a measurement associated with the reservoir fluid and using a processor to: estimate a fluid component property by using an equation of state based the measurement and simulate a diffusion process using a diffusive model that takes into account the estimated fluid property. The diffusive model accounts for gravitational diffusion of components in the reservoir fluid. The method also includes using the processor to estimate reservoir fluid geodynamic processes based on the fluid property; compare the estimated reservoir fluid geodynamic processes with the measurement associated with the reservoir fluid; and output reservoir fluid geodynamic processes corresponding to the measurement associated with the reservoir fluid.

    Asphaltene Phase Instability Analysis in Gas Charges into Oil Reservoirs
    19.
    发明申请
    Asphaltene Phase Instability Analysis in Gas Charges into Oil Reservoirs 审中-公开

    公开(公告)号：US20180004863A1

    公开(公告)日：2018-01-04

    申请号：US15196128

    申请日：2016-06-29

    Applicant: Schlumberger Technology Corporation

    Inventor： Youxiang Zuo ,  Shu Pan ,  Yi Chen ,  Kang Wang ,  Oliver C. Mullins

    IPC: G06F17/50 ,  G06F17/11

    CPC classification number: G06F17/5009 ,  E21B49/082 ,  G06F2217/16

    Abstract: A method includes placing a downhole acquisition tool in a wellbore in a geological formation containing a reservoir fluid. The method includes performing downhole fluid analysis using the downhole acquisition tool to determine at least one measurement of the reservoir fluid. The method includes using a processor to estimate at least one fluid component property by using an equation of state based at least in part on the at least one measurement of the reservoir fluid and to simulate a diffusion process using a diffusion model that takes into account the at least one estimated fluid property to generate a composition path. The method includes using a processor to estimate one or more phase envelopes based in part on the at least one fluid property and compare the one or more phase envelopes with the composition path. The method includes outputting a visualization identify potential areas of asphaltene instability.

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