Michael W Stein

US Patent:

53052099, Apr 19, 1994

Filed:

Jan 31, 1991

Appl. No.:

7/649646

Inventors:

Michael H. Stein - Houston TX
Francis M. Carlson - Broken Arrow OK

Assignee:

Amoco Corporation - Chicago IL

International Classification:

G01V 100

US Classification:

364420

Abstract:

A novel method for characterizing multilayer subterranean reservoirs comprising forming a single layer reservoir model representative of the flow parameters of the multilayer reservoir and developing a set of predicted flow rates from a numerical reservoir simulator. The predicted flow rates are scaled to form a set of dimensionless flow rates. Differences between actual reservoir flow rates and predicted flow rates obtained from the dimensionless flow rates, are minimized automatically to obtain estimates of flow parameters for each layer of the multilayer reservoir. Additionally, for a given set of flow parameters, the optimum injection and production well patterns as well as injection and production well operating conditions can be determined for producing hydrocarbon from the multilayer reservoir.

US Patent:

48831220, Nov 28, 1989

Filed:

Sep 27, 1988

Appl. No.:

7/249810

Inventors:

Rajen Puri - Tulsa OK
Michael H. Stein - Houston TX

Assignee:

Amoco Corporation - Chicago IL

International Classification:

E21B 4324
E21B 4330
E21B 4340

US Classification:

166263

Abstract:

A method of producing coalbed methane by injecting inert gas, such as nitrogen, through an injection well into the coal seam and recovering coalbed methane from a production well(s). Methane desorption from coal is achieved by reduction in methane partial pressure rather than by reduction in total pressure alone.

US Patent:

50147854, May 14, 1991

Filed:

Aug 8, 1989

Appl. No.:

7/391212

Inventors:

Rajen Puri - Tulsa OK
Michael H. Stein - Houston TX

Assignee:

Amoco Corporation - Chicago IL

International Classification:

E21B 4316
E21B 4324
E21B 4330
E21B 4340

US Classification:

166263

Abstract:

A method of producing methane by injecting inert gas, such as nitrogen, through an injection well into a solid carbonaceous subterranean formation (e. g. , coal) and recovering methane from a production well(s). Methane desorption is achieved by reduction in methane partial pressure rather than by reduction in total pressure alone.