Donald James Macallister

US Patent:

59240482, Jul 13, 1999

Filed:

Mar 14, 1997

Appl. No.:

8/818733

Inventors:

Michael D. McCormack - Plano TX
Donald J. MacAllister - Carrollton TX
Richard F. Stoisits - Plano TX
Perry W. Scherer - Harrison NY
Tuan D. Ma - Anchorage AL

International Classification:

G06F 1900

US Classification:

702 13

Abstract:

A system for producing a material balance solution for well patterns in a hydrocarbon reservoir is described that automatically optimizes the fluid allocation factors for each well used in determining the solution. The system automatically optimizes estimates for the allocation factors to be used in the material balance solution by randomly generating a first generation of allocation factor strings, each string in the generation assigning allocation factors to each of the wells in the reservoir. A fitness function value is determined for each of the strings by evaluating a fitness function, wherein the fitness function comprises the sum of the differences between computed and measured field pressures for each pattern, and the sum of the differences between target allocation factors and the allocation factors specified within the string for each well. A succeeding generation of allocation factor strings is produced according to a genetic algorithm. The process of determining a fitness function value for each of the strings is then repeated for the succeeding generation.

US Patent:

47154446, Dec 29, 1987

Filed:

Oct 27, 1986

Appl. No.:

6/923241

Inventors:

Donald J. MacAllister - Carrollton TX
Virginia W. Pennington - Dallas TX

Assignee:

Atlantic Richfield Company - Los Angeles CA

International Classification:

E21B 4316
E21B 4320

US Classification:

166269

Abstract:

A method for recovering hydrocarbons from a subterranean hydrocarbon-containing formation penetrated by at least two wellbores, said method comprising: (a) injecting a gaseous stream into the formation near the bottom of the formation through a first wellbore; (b) injecting an aqueous stream into the formation near the top of the formation through the first wellbore; and (c) recovering hydrocarbons from the formation through a second wellbore.

US Patent:

6128579, Oct 3, 2000

Filed:

Aug 25, 1998

Appl. No.:

9/140121

Inventors:

Michael D. McCormack - Plano TX
Donald J. MacAllister - Carrollton TX
Richard F. Stoisits - Plano TX
Perry W. Scherer - Harrison NY
Tuan D. Ma - Anchorage AK

Assignee:

Atlantic Richfield Corporation - Los Angeles CA

International Classification:

G01V 338

US Classification:

702 13

Abstract:

A system for producing a material balance solution for well patterns in a hydrocarbon reservoir is described that automatically optimizes the fluid allocation factors for each well used in determining the solution. The system automatically optimizes estimates for the allocation factors to be used in the material balance solution by randomly generating a first generation of allocation factor strings, each string in the generation assigning allocation factors to each of the wells in the reservoir. A fitness function value is determined for each of the strings by evaluating a fitness function, wherein the fitness function comprises the sum of the differences between computed and measured field pressures for each pattern, and the sum of the differences between target allocation factors and the allocation factors specified within the string for each well. A succeeding generation of allocation factor strings is produced according to a genetic algorithm. The process of determining a fitness function value for each of the strings is then repeated for the succeeding generation.

US Patent:

6236894, May 22, 2001

Filed:

Dec 19, 1997

Appl. No.:

8/994975

Inventors:

Richard F. Stoisits - Plano TX
Kelly D. Crawford - Allen TX
Donald J. MacAllister - Carrollton TX
Michael D. McCormack - Plano TX

Assignee:

Atlantic Richfield Company - Chicago IL

International Classification:

G05B 1302

US Classification:

700 28

Abstract:

A computer system and method of operating the same to optimize the operating conditions of a petroleum production field, in which a plurality of wells are arranged according to drill sites, and connected to one or more central processing facilities, is disclosed. In this disclosed embodiment, gas compression capacity is a significant constraint on the operation of the complex production field, and surface line hydraulic effects of well production are to be considered in the optimization. A genetic algorithm is used to generate, and iteratively evaluate solution vectors, which are combinations of field operating parameters such as incremental gas-oil ratio cutoff and formation gas-oil ratio cutoff values. The evaluation includes the operation of an adaptive network to determine production header pressures, followed by modification of well output estimates to account for changes in the production header pressure. Convergence of the genetic algorithm identifies one of the solution vectors as containing an optimal combination of field operating parameters that may be used by production personnel to set the operating conditions of the field.