公开(公告)号：US20210149077A1

公开(公告)日：2021-05-20

申请号：US17047152

申请日：2018-05-09

Applicant: Landmark Graphics Corporation

Inventor： Yevgeniy ZAGAYEVSKIY ,  Hanzi MAO ,  Harsh Biren VORA ,  Hui DONG ,  Terry WONG ,  Dominic CAMILLERI ,  Charles Hai WANG ,  Courtney Leeann BECK

IPC: G01V99/00 ,  G06Q10/06 ,  G06Q50/02 ,  G06N20/20 ,  E21B49/00

Abstract: A method for history matching a reservoir model based on actual production data from the reservoir over time generates an ensemble of reservoir models using geological data representing petrophysical properties of a subterranean reservoir. Production data corresponding to a particular time instance is acquired from the subterranean reservoir. Normal score transformation is performed on the ensemble and on the acquired production data to transform respective original distributions into normal distributions. The generated ensemble is updated based on the transformed acquired production data using an ensemble Kalman filter (EnKF). The updated generated ensemble and the transformed acquired production data are transformed back to respective original distributions. Future reservoir behavior is predicted based on the updated ensemble.

公开(公告)号：US20210404302A1

公开(公告)日：2021-12-30

申请号：US16474185

申请日：2018-08-09

Applicant: Landmark Graphics Corporation

Inventor： Srinath MADASU ,  Terry WONG ,  Keshava Prasad RANGARAJAN ,  Steven WARD ,  ZhiXiang JIANG

IPC: E21B43/12 ,  E21B49/08

Abstract: A system and method for controlling a gas supply to provide gas lift for a production wellbore makes use of Bayesian optimization. A computing device controls a gas supply to inject gas into one or more wellbores. The computing device receives reservoir data associated with a subterranean reservoir to be penetrated by the wellbores and can simulate production using the reservoir data and using a physics-based or machine learning or hybrid physics-based machine learning model for the subterranean reservoir. The production simulation can provide production data. A Bayesian optimization of an objective function of the production data subject to any gas injection constraints can be performed to produce gas lift parameters. The gas lift parameters can be applied to the gas supply to control the injection of gas into the wellbore or wellbores.