公开(公告)号：US10371690B2

公开(公告)日：2019-08-06

申请号：US14535199

申请日：2014-11-06

Applicant: Schlumberger Technology Corporation

Inventor： Youxiang Zuo ,  Christopher Harrison ,  Adriaan Gisolf ,  Cosan Ayan ,  Michael Mallari Toribio ,  Chetankumar Natwarlal Desai ,  Oliver Clinton Mullins ,  Matthew T. Sullivan ,  Elizabeth Smythe

IPC: G01N33/28 ,  E21B49/00 ,  E21B49/08 ,  G01N7/00 ,  E21B47/00 ,  E21B47/06 ,  G01N21/31

Abstract: Embodiments of the disclosure can include systems, methods, and devices for determining saturation pressure of an uncontaminated fluid. Downhole saturation pressure measurements and downhole OBM filtrate contamination of a contaminated fluid may be obtained and a relationship may be determined between the saturation pressure measurements and OBM filtrate contamination. The relationship may be extrapolated to zero OBM filtrate contamination to determine the saturation pressure of the uncontaminated fluid. In some embodiments, OBM filtrate contamination may be determined from downhole saturation pressure measurements during pumpout of a fluid.

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.

公开(公告)号：US10345481B2

公开(公告)日：2019-07-09

申请号：US14571660

申请日：2014-12-16

Applicant: Schlumberger Technology Corporation

Inventor： Denise E. Freed ,  Oliver C. Mullins ,  Youxiang Zuo

IPC: G01V11/00 ,  G01V99/00 ,  G06F17/50 ,  E21B43/00 ,  E21B49/08 ,  G01N33/28

Abstract: The present disclosure relates to methods and systems for developing an equation of state model for petroleum fluids. In one embodiment, formation fluid from a plurality of depths within a wellbore may be analyzed to determine a change in a gas oil ratio with respect to depth. The change in the gas oil ratio may be employed to determine a ratio of solubility and entropy terms to a gravity term. The resulting ratio can be used to develop the equation of state model.

公开(公告)号：US10330665B2

公开(公告)日：2019-06-25

申请号：US14933807

申请日：2015-11-05

Applicant: Schlumberger Technology Corporation

Inventor： Youxiang Zuo ,  Oliver C. Mullins ,  Richard Jackson ,  Ankit Agarwal

IPC: E21B49/08 ,  G01N33/28

Abstract: Upper and lower asphaltene weight fractions of fluid proximate ends of an oil column are obtained based on measured OD. Upper and lower maltene partial densities are obtained based on the asphaltene weight fractions. A maltene partial density distribution is obtained utilizing the maltene partial densities and a predetermined diffusion model. An asphaltene partial density distribution is obtained based on the maltene partial density distribution and an estimated mass density gradient. An asphaltene weight percentage is obtained based on the asphaltene partial density distribution and the mass density gradient. The asphaltene weight percentage distribution is converted to an OD distribution utilizing a predetermined correlation. An optimization then reduces differences between the OD distribution and the measured OD data to within a predetermined range to refine a biodegradation time of the predetermined diffusion model. A viscosity distribution may be obtained based on the optimized OD distribution.

公开(公告)号：US10227970B2

公开(公告)日：2019-03-12

申请号：US15183432

申请日：2016-06-15

Applicant: Schlumberger Technology Corporation

Inventor： Adriaan Gisolf ,  Youxiang Zuo ,  Yi Chen

IPC: F04B49/06 ,  E21B47/00 ,  E21B49/08 ,  F04B49/22 ,  F04B47/02 ,  F04B53/14

Abstract: First piston position data of a piston in a displacement unit is obtained based on an output signal from a sensor associated with the displacement unit, the output signal being dependent upon a physical position of the piston in the displacement unit. Second piston position data of the piston in the displacement unit is obtained based on data indicative of a number of revolutions of a hydraulic motor in a hydraulic system, the hydraulic system being operable to drive the piston of the displacement unit. Based on the second piston position data, a flow rate of a fluid pumped by the displacement unit is estimated. A system correction factor is generated based on the first piston position data and the second piston position data. The estimated flow rate is adjusted based on the system correction factor.

公开(公告)号：US10132164B2

公开(公告)日：2018-11-20

申请号：US14975698

申请日：2015-12-18

Applicant: Schlumberger Technology Corporation

Inventor： Hadrien Dumont ,  Christopher Harrison ,  Youxiang Zuo ,  Christopher Albert Babin ,  Abhishek Agarwal ,  Adriaan Gisolf

IPC: E21B49/08 ,  E21B49/10

Abstract: Systems and methods for obtaining in-situ measurements of mixed formation fluids are provided. A downhole acquisition tool may move to a first station in a wellbore in a geological formation to collect a sample of first formation fluid from the first station. The downhole acquisition tool may move to a second station in the wellbore and a sample of second formation fluid may be collected. A proportion of the first formation fluid and the second formation fluid may be mixed within the downhole acquisition tool in-situ while the downhole acquisition tool is within the wellbore to obtain a formation fluid mixture. The formation fluid mixture may be passed into a fluid testing component of the downhole acquisition tool while the downhole acquisition tool is in the wellbore to measure fluid properties of the formation fluid mixture in-situ.

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.

公开(公告)号：US09835029B2

公开(公告)日：2017-12-05

申请号：US14560880

申请日：2014-12-04

Applicant: Schlumberger Technology Corporation

Inventor： Hadrien Dumont ,  Youxiang Zuo ,  Beatriz E. Barbosa

IPC: E21B49/08

CPC classification number: E21B49/10 ,  E21B34/06 ,  E21B47/06 ,  E21B49/088 ,  E21B2049/085 ,  G01V9/00

Abstract: The present disclosure relates to methods and apparatus for determining a viscosity-pressure profile of downhole fluid by measuring the viscosity at several different pressures during a sampling operation. According to certain embodiments, the viscosity may be measured at different times during a sampling operation and used to generate the viscosity-pressure profile. For example, the viscosity may be measured at the beginning of pumping, during filling of a sample chamber, during a pressure-build up period, and while retracting the probe. The measured viscosities may then be employed to determine a profile that represents the change in viscosity that occurs with pressure.

公开(公告)号：US20170067338A1

公开(公告)日：2017-03-09

申请号：US14846591

申请日：2015-09-04

Applicant: Schlumberger Technology Corporation

Inventor： Adriaan Gisolf ,  Lei Jiang ,  Anthony Robert Holmes Goodwin ,  Youxiang Zuo

IPC: E21B49/08

CPC classification number: E21B49/081 ,  E21B49/10 ,  E21B2049/085

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, obtaining a measured resistivity, a measured conductivity, or both of the portion of the fluid using the downhole acquisition tool, and using a processor of the downhole acquisition tool to obtain a temperature-corrected resistivity, a temperature-corrected conductivity, or both based on a downhole temperature of the portion of the fluid and the measured resistivity, the measured conductivity, or both.

Abstract translation: 一种方法包括在地质层中的井眼中操作井下采集工具。 井眼或地质构造或两者都含有包括地质构造的天然储层流体和污染物的流体。 该方法还包括将一部分流体接收到井下采集工具中，使用井下采集工具获得测量的电阻率，测量的导电率或两者的流体，并使用井下采集工具的处理器获得 温度校正的电阻率，温度校正的电导率或两者基于流体的部分的井下温度和测量的电阻率，测量的电导率，或二者。

公开(公告)号：US20160319662A1

公开(公告)日：2016-11-03

申请号：US15135411

申请日：2016-04-21

Applicant: Schlumberger Technology Corporation

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

IPC: E21B49/08 ,  G01F22/00

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.

Abstract translation: 一种方法包括在地质层中的井眼中操作井下采集工具。 井眼或地质构造或两者都含有包含地质构造的天然储层流体和污染物的第一流体。 该方法还包括将第一流体的一部分接收到井下采集工具中，并使用井下采集工具确定第一流体的该部分的多个性质。 多个性质包括第一流体部分的组分的质量分数和第一流体的该部分的密度。 该方法还包括使用处理器至少部分地基于组成质量分数函数来估计第一流体部分中的污染物的体积分数，该组成质量分数函数至少取决于第一流体的部分中的组分的质量分数 流体和第一流体的部分的密度。