Chevron U.s.a. Inc.

China National Offshore Oil Corporation

Services Petroliers Schlumberger

Geoquest Systems B.v.

Xian-Huan Wen

Bo Li

Song Liu

Wen Hsiung Chen

Dengen Zhou

Yalchin Efendiev

Lixin Tian

Chunming Zhao

Qinghong Yang

Peng Zhang

Lichuan Lan

Lizhen Ge

Xinwu Liao

Fengli Zhang

Michael Sheng-Wei Wei

Seong Hee Lee

Song Du

Computer-implemented systems and methods are provided for optimizing hydrocarbon recovery from subsurface formations, including subsurface formations having bottom water or edgewater. A system and method can be configured to receive data indicative of by-pass oil areas in the subsurface formation from reservoir simulation, identify flow barriers in the subsurface formation based on the by-pass oil areas identified by the reservoir simulation, and predict the lateral extension of the identified flow barriers in the subsurface formation. Infill horizontal wells can be placed at areas of the subsurface formation relative to the flow barriers such that production from a horizontal well in the subsurface formation optimizes hydrocarbon recovery.

Method for optimizing well production in reservoirs having flow barriers

A method, system and apparatus for real-time reservoir model updating using ensemble Kalman filters is described. The method includes a conforming step for bring bringing static and dynamic state variables into conformance with one another during a time step of the updating. Also, an iterative damping method is used in conjunction with the conformance step to account for nonGaussian and nonlinear features in a system. Also, a re-sampling method is described which reduces the ensemble size of reservoir models which are to be updated.

Method, system and apparatus for real-time reservoir model updating using ensemble kalman filter

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Pleasanton, CA, United States of America

Xian-Huan Wen