Charles W Guthrie

US Patent:

6446721, Sep 10, 2002

Filed:

Mar 23, 2001

Appl. No.:

09/816848

Inventors:

Anilkumar Patel - Fremont CA
Charles F. Guthrie - Richmond CA
Loren J. Lederhos - Bakersfield CA
James R. Ouimette - Petaluma CA

Assignee:

Chevron U.S.A. Inc. - San Ramon CA

International Classification:

E21B 4324

US Classification:

1662521, 1662723

Abstract:

The invention includes a method of scheduling cyclic steaming of a group of petroleum-containing wells including: inputting to a production-predicting means a group of data describing at least in part the past cyclic steaming and resulting production of a group of petroleum-containing wells; processing the data in the production-predicting means and outputting a group of production predictions for the group of wells during a future steaming cycle; inputting the group of production predictions into an optimization means; inputting an initial steaming cycle schedule for the group of wells into the optimization means; processing the group of production predictions and the initial steaming cycle schedule in the optimization means by the steps including: determining a ranking for the initial steaming cycle schedule for the group of production predictions against a pre-determined ranking criteria; producing a group of new steaming cycle schedules based on the ranking of the initial steaming cycle a schedule optimization algorithm; determining a ranking for the new steaming cycle schedules against the pre-determined ranking criteria; repeating the production of new steaming cycle schedules and determining ranking steps until some pre-determined termination criteria is met; and outputting a final steaming cycle schedule.

US Patent:

7565305, Jul 21, 2009

Filed:

Sep 25, 2006

Appl. No.:

11/527761

Inventors:

David N. Shipley - Vallejo CA, US
Paul S. Lundy - Katy TX, US
David W. Tuk - Fairfield CA, US
Charles F. Guthrie - Richmond CA, US
Rick A. Dotterer - Pleasant Hill CA, US
Michael Carney - Houston TX, US

Assignee:

Schlumberger Technology Corp. - Houston TX

International Classification:

G06F 17/60

US Classification:

705 7, 705 1, 705 10

Abstract:

A method involves identifying work elements of a work process which may be enhanced to provide a biggest impact on enhancing an overall value of the work process. The method involves identifying a plurality of work elements comprising a work process, interviewing one or more knowledgeable interviewees and determining existing states and enhanced proposed states of the plurality of work elements, visually displaying the existing and enhanced proposed states of the work elements, and estimating and visually displaying a change in value of the work process due to an enhancement of the work elements from the existing states to the enhanced proposed states.

US Patent:

7797139, Sep 14, 2010

Filed:

Dec 7, 2001

Appl. No.:

10/013195

Inventors:

Charles F. Guthrie - Richmond CA, US
Anil Patel - Fremont CA, US

Assignee:

Chevron U.S.A. Inc. - San Ramon CA

International Classification:

G06F 17/10

US Classification:

703 2, 703 10

Abstract:

A method of scheduling cyclic steaming of petroleum-containing wells including: inputting to a production-predictor data describing the past cyclic steaming and resulting production of wells; processing the data in the production-predictor and outputting production predictions for the wells during a future steaming cycle; inputting the production predictions into an optimizer; inputting an initial steaming Optimal Cycle Length schedule for the wells into the optimizer; processing the production predictions and the initial steaming cycle schedule in the optimizer by: determining a ranking for the initial steaming cycle schedule for the production predictions against a pre-determined ranking criteria; producing new steaming cycle schedules based on the ranking of the initial steaming cycle a schedule optimization algorithm; determining a ranking for the new steaming schedules against the ranking criteria; repeating the production of schedules and determining ranking steps until some pre-determined termination criteria is met.

US Patent:

20080283245, Nov 20, 2008

Filed:

May 16, 2007

Appl. No.:

11/749628

Inventors:

David Tuk - Fairfield CA, US
Anilkumar Patel - Fremont CA, US
Charles Guthrie - Richmond CA, US
Richard Cullip - Bakersfield CA, US
Mike Riddle - Napa CA, US

International Classification:

E21B 43/24

US Classification:

166302, 700300

Abstract:

The present invention includes a method and system for heat management in an oil field, the method including the steps of, on a first time interval: determine a thermal maturity for each subsurface region associated with a pattern of oil wells in the oil field, input the thermal maturity output from step (a)(i) and determine a latent heat target and steam injection target for each subsurface region; and input the latent heat target and steam injection target output from step (a)(ii) and a subsurface region development plan and recalibrate a steam optimizer policy engine, on a second time interval: using the recalibrated steam optimizer policy engine from step (a)(iii) and operating data, determine steam injection schedules; and collect operating data; and on a third time interval: input the thermal maturity output from step (i) and perform a periodic look-back process, thereby producing deviations from latent heat targets; and input the deviations from latent heat targets from step (c)(i) and re-determine the subsurface region development plan.

US Patent:

52602400, Nov 9, 1993

Filed:

Dec 9, 1991

Appl. No.:

7/803925

Inventors:

Charles F. Guthrie - El Sobrante CA
Lawrence W. Jossens - Albany CA
James V. Kennedy - Greenbrae CA
John A. Paraskos - San Rafael CA

Assignee:

Chevron Research and Technology Company - San Francisco CA

International Classification:

B01J 2938
B01J 3830
B01J 3806
C10G 1118

US Classification:

502 41

Abstract:

A process is disclosed for passivating the reactivity of contaminant metals, such as nickel and vanadium, which have been deposited on a catalytic cracking catalyst, by adding to the cracking catalyst a mixture of a calcium-containing material and a magnesium-containing material in a separate reactor in the presence of steam. The preferred calcium-containing material is dolomite and the preferred magnesium-containing material is sepiolite. It is also preferred to include antimony and/or bismuth compounds in the additive mixture.