Yong C Chang

US Patent:

20110266056, Nov 3, 2011

Filed:

Oct 28, 2009

Appl. No.:

13/126540

Inventors:

Julian J. Pop - Houston TX, US
Yong Chang - Missouri City TX, US

International Classification:

E21B 47/026
G06G 7/48

US Classification:

175 50, 703 7, 703 6, 703 10

Abstract:

Methods and apparatus for planning and dynamically updating sampling operations while drilling in a subterranean formation are described. An example method of planning a sampling while drilling operation for a subterranean formation includes identifying a plurality of processes and related parameters, the processes including drilling and sampling processes and the related parameters including drilling and sampling parameters. The example method also involves processing the parameters for each of the processes via a simulation engine to generate predictions associated with sampling the formation, the simulation engine including at least one of a wellbore hydraulics simulator, a mudcake simulator, a formation flow simulator, or a tool response simulator. The example method also involves ranking the predictions associated with sampling the formation based on at least one of a sample fluid quality, a sampling process duration, a sampling process efficiency or a cost of sampling, and planning the sampling operation based on the ranked predictions.

US Patent:

20120253679, Oct 4, 2012

Filed:

Mar 23, 2011

Appl. No.:

13/069674

Inventors:

Yong Chang - Missouri City TX, US
Julian J. Pop - Houston TX, US

International Classification:

G06F 19/00
E21B 49/10

US Classification:

702 11, 7315224

Abstract:

Methods of and apparatus to perform a drawdown of a formation fluid in a downhole environment are disclosed. An example method includes contacting a borehole wall with a fluid communication device of a formation testing tool and performing a first type of drawdown to draw fluid into the fluid communication device. The method also includes detecting a breach of a mudcake on the borehole wall during performance of the first type of drawdown and performing a second type of drawdown to draw fluid into the sample probe in response to detecting the breach of the mudcake. The second type of drawdown is different than the first type of drawdown. Furthermore, the example method includes confirming the breach of the mudcake on the borehole wall during performance of the second type of drawdown.

US Patent:

20190145254, May 16, 2019

Filed:

Jan 15, 2019

Appl. No.:

16/248097

Inventors:

- Sugar Land TX, US
Yong Chang - Sugar Land TX, US
Ashers Partouche - Katy TX, US
Sylvain Bedouet - Houston TX, US

International Classification:

E21B 49/08
E21B 47/12

Abstract:

An inlet for a single packer, having at least one sample inlet and at least one guard inlet surrounding the periphery of the at least one sample inlet, wherein the at least one sample inlet has at least one side that is parallel to another side of the at least one sample inlet and the at least one sample inlet has at least two rounded ends connecting each of the parallel sides, and the at least one guard inlet has at least one side that is parallel to another side of the at least one guard inlet and the at least one guard inlet has at least two rounded ends connecting each of the parallel side of the guard inlet.

US Patent:

20170152743, Jun 1, 2017

Filed:

Dec 1, 2015

Appl. No.:

14/956338

Inventors:

- Sugar Land TX, US
Kai Hsu - Sugar Land TX, US
Yong Chang - Sugar Land TX, US
Youxiang Zuo - Burnaby, CA
Ryan Sangjun Lee - Sugar Land TX, US
Ashers Partouche - Katy TX, US

International Classification:

E21B 49/08
G01N 1/14
E21B 49/10

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.

US Patent:

20160130940, May 12, 2016

Filed:

Nov 6, 2014

Appl. No.:

14/534813

Inventors:

- Sugar Land TX, US
Adriaan Gisolf - Houston TX, US
Youxiang Zuo - Burnaby, CA
Yong Chang - Sugar Land TX, US
Beatriz E. Barbosa - Houston TX, US

International Classification:

E21B 49/08
E21B 47/00

Abstract:

Embodiments of the disclosure can include systems and methods for formation fluid sampling. In one embodiment, a method can include monitoring a relationship between a first characteristic of a formation fluid extracted from a formation and a second characteristic of the formation fluid extracted from the formation, determining, based at least in part on the monitoring, that a linear trend is exhibited by the relationship between the first characteristic of the formation fluid extracted from the formation and the second characteristic of the formation fluid extracted from the formation, and determining a reservoir fluid breakthrough based at least in part on the identification of the linear trend, wherein the reservoir fluid breakthrough is indicative of virgin reservoir fluid entering a sampling tool.

US Patent:

20150330218, Nov 19, 2015

Filed:

Jul 23, 2015

Appl. No.:

14/807723

Inventors:

- Sugar Land TX, US
Yong Chang - Sugar Land TX, US

International Classification:

E21B 49/08
G05B 13/04
E21B 21/08

Abstract:

An example method of planning a sampling while drilling operation for a subterranean formation includes identifying a plurality of processes and related parameters, the processes including drilling and sampling processes and the related parameters including drilling and sampling parameters. The example method also involves processing the parameters for each of the processes via a simulation engine to generate predictions associated with sampling the formation, the simulation engine including at least one of a wellbore hydraulics simulator, a mudcake simulator, a formation flow simulator, or a tool response simulator. The example method also involves ranking the predictions associated with sampling the formation based on at least one of a sample fluid quality, a sampling process duration, a sampling process efficiency or a cost of sampling, and planning the sampling operation based on the ranked predictions.

US Patent:

20150167457, Jun 18, 2015

Filed:

Dec 13, 2013

Appl. No.:

14/106540

Inventors:

- Sugar Land TX, US
Yong Chang - Sugar Land TX, US
Ashers Partouche - Richmond TX, US
Sylvain Bedouet - Houston TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 49/08

Abstract:

An inlet for a single packer, having at least one sample inlet and at least one guard inlet surrounding the periphery of the at least one sample inlet, wherein the at least one sample inlet has at least one side that is parallel to another side of the at least one sample inlet and the at least one sample inlet has at least two rounded ends connecting each of the parallel sides, and the at least one guard inlet has at least one side that is parallel to another side of the at least one guard inlet and the at least one guard inlet has at least two rounded ends connecting each of the parallel side of the guard inlet.