公开(公告)号：US11280191B2

公开(公告)日：2022-03-22

申请号：US14373019

申请日：2013-01-17

Applicant: Schlumberger Technology Corporation

Inventor： Youxiang Zuo ,  Oliver C. Mullins ,  Francois Xavier Dubost ,  Cosan Ayan ,  Wael Abdallah ,  Andrew E. Pomerantz ,  Dingan Zhang

IPC: E21B49/08 ,  E21B49/00 ,  E21B49/02

Abstract: A methodology that performs fluid sampling within a wellbore traversing a reservoir and fluid analysis on the fluid sample(s) to determine properties (including asphaltene concentration) of the fluid sample(s). At least one model is used to predict asphaltene concentration as a function of location in the reservoir. The predicted asphaltene concentrations are compared with corresponding concentrations measured by the fluid analysis to identify if the asphaltene of the fluid sample(s) corresponds to a particular asphaltene type (e.g., asphaltene clusters common in heavy oil). If so, a viscosity model is used to derive viscosity of the reservoir fluids as a function of location in the reservoir. The viscosity model allows for gradients in the viscosity of the reservoir fluids as a function of depth. The results of the viscosity model (and/or parts thereof) can be used in reservoir understanding workflows and in reservoir simulation.

公开(公告)号：US11269113B2

公开(公告)日：2022-03-08

申请号：US16318127

申请日：2016-07-22

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Armin Kauerauf ,  Oliver C. Mullins ,  Thomas Hantschel ,  Kang Wang ,  Adrian Kleine ,  Youxiang Zuo

IPC: G06G7/48 ,  G01V99/00 ,  G06F30/23 ,  G06F111/10

Abstract: A method, apparatus, and program product model address a modeling gap existing between basin and reservoir modeling through the use of a Reservoir Fluid Geodynamics (RFG) model usable for simulations conducted at a relatively fine spatial resolution and over a geological timescale.

公开(公告)号：US11188689B2

公开(公告)日：2021-11-30

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: G06G7/48 ,  G06F30/20 ,  E21B49/08 ,  G06F111/10

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：US10309885B2

公开(公告)日：2019-06-04

申请号：US14085550

申请日：2013-11-20

Applicant: Schlumberger Technology Corporation

Inventor： Youxiang Zuo ,  Adriaan Gisolf ,  Julian Pop ,  Oliver Mullins ,  Chetankumar Desai

IPC: G01N9/00 ,  E21B49/08 ,  G01N9/36 ,  G01N33/28

Abstract: A method for contamination monitoring includes measuring water based mud filtrate density and resistivity at downhole conditions, logging properties of a downhole fluid to find at least a resistivity and a density of a fluid sample at the downhole conditions, establishing a linear relationship between a water based mud filtrate conductivity at downhole conditions and the water based mud filtrate density at the downhole conditions, determining a density and a resistivity for native formation water, estimating a density for water based mud filtrate using the linear relationship between conductivity and density, and estimating a water based mud filtrate contamination.

公开(公告)号：US10295522B2

公开(公告)日：2019-05-21

申请号：US15419137

申请日：2017-01-30

Applicant: Schlumberger Technology Corporation

Inventor： Youxiang Zuo ,  Adriaan Gisolf ,  Li Chen

IPC: G01N33/28 ,  E21B41/00 ,  E21B49/10

Abstract: Methods and apparatus for operating a downhole tool within a wellbore adjacent a subterranean formation to pump contaminated fluid from the formation into the downhole tool while measuring first and second fluid properties of the contaminated fluid. The contaminated fluid comprises native fluid from the formation and a contaminant. The downhole tool is in communication with surface equipment located at surface. The downhole tool and/or surface equipment is operated to estimate a formation volume factor of the contaminated fluid based on at least one of the first and second fluid properties of the contaminated fluid. A linear relationship is then estimated between the first fluid property and a function that relates the first fluid property to the second fluid property and the estimated formation volume factor of the contaminated fluid. A fluid property of the contaminant is then estimated based on the estimated linear relationship.

公开(公告)号：US10100638B2

公开(公告)日：2018-10-16

申请号：US14945800

申请日：2015-11-19

Applicant: Schlumberger Technology Corporation

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

IPC: G01V1/40 ,  G06G7/48 ,  E21B49/08 ,  G01V99/00 ,  E21B49/10

Abstract: The present disclosure relates to a method for characterizing a hydrocarbon reservoir of interest traversed by at least one wellbore that includes (a) using a numerical model to simulate over geological time a non-equilibrium concentration of an asphaltene component as a function of location within the wellbore, (b) analyzing fluid samples acquired from at least one wellbore that traverses the reservoir of interest to measure concentration of the asphaltene component as a function of location within the wellbore, (c) comparing the non-equilibrium concentration of the asphaltene component as a function of location within the wellbore resulting from the simulation of (a) to the concentration of the asphaltene component as a function of location within the wellbore as measured in (b), and characterizing the reservoir of interest based upon the comparing of (c).

公开(公告)号：US10012633B2

公开(公告)日：2018-07-03

申请号：US15599515

申请日：2017-05-19

Applicant: Schlumberger Technology Corporation

Inventor： Adriaan Gisolf ,  Youxiang Zuo ,  Ronald E. G. van Hal ,  Jeffrey Crank

IPC: G01N33/28 ,  G01N30/88 ,  B01L7/00 ,  E21B49/08 ,  E21B49/10

CPC classification number: G01N33/2823 ,  E21B49/087 ,  E21B49/10 ,  E21B2049/085 ,  G01N30/88 ,  G01N33/28 ,  G01N2030/8854

Abstract: Methods are provided for reservoir analysis. In some embodiments, a reservoir may be analyzed by obtaining abundance ratios at a first measurement station and a second measurement station and determining an abundance ratio trend. Abundance ratios at a third measurement station may be obtained and plotted versus depth with the previously obtained abundance ratios. A change in the abundance ratio trend may be identified and result in further investigation of the reservoir. If the abundance ratio is unchanged, additional abundance ratios may be obtained and plotted versus depth to further evaluate the abundance ratio trend. Methods for reservoir analysis using fluid predictions with and without offset well information are also provided.

公开(公告)号：US20170363077A1

公开(公告)日：2017-12-21

申请号：US15183432

申请日：2016-06-15

Applicant: Schlumberger Technology Corporation

Inventor： Adriaan Gisolf ,  Youxiang Zuo ,  Yi Chen

IPC: F04B49/06 ,  E21B43/12 ,  F04B49/22 ,  G05B19/416 ,  F04B47/02 ,  F04B53/14 ,  E21B49/08 ,  E21B47/00 ,  E21B47/18

CPC classification number: F04B49/065 ,  E21B47/0007 ,  E21B49/081 ,  F04B47/02 ,  F04B49/22 ,  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：US20170284197A1

公开(公告)日：2017-10-05

申请号：US15087770

申请日：2016-03-31

Applicant: Schlumberger Technology Corporation

Inventor： Hadrien Dumont ,  Christopher Harrison ,  Youxiang Zuo ,  Christopher Albert Babin ,  Li Chen ,  Vinay K. Mishra ,  German Garcia ,  Abhishek Agarwal ,  Matthew T. Sullivan

IPC: E21B49/08

CPC classification number: E21B49/10 ,  E21B47/065 ,  E21B2049/085

Abstract: Methods for obtaining in-situ, multi-temperature measurements of fluid properties, such as saturation pressure and asphaltene onset pressure, are provided. In one example, a sample of formation fluid is obtained using a downhole acquisition tool positioned in a wellbore in a geological formation. The downhole acquisition tool may be stationed at a first depth in the wellbore that has an ambient first temperature. While stationed at the first depth, the downhole acquisition tool may test a first fluid property of the sample to obtain a first measurement point at approximately the first temperature. The downhole acquisition tool may be moved to a subsequent station at a new depth with an ambient second temperature, and another measurement point obtained at approximately the second temperature. From the measurement points, a temperature-dependent relationship of the first fluid property of the first formation fluid may be determined.

公开(公告)号：US20170152743A1

公开(公告)日：2017-06-01

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 ,  G01N1/14 ,  E21B49/10

CPC classification number: E21B49/081 ,  E21B47/12 ,  E21B49/10 ,  E21B2049/085 ,  G01N1/14

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.