公开(公告)号：US20200380390A1

公开(公告)日：2020-12-03

申请号：US16706596

申请日：2019-12-06

Applicant: Chevron U.S.A. Inc.

Inventor： Tao Sun ,  Sebastien B. Strebelle ,  Ashley D. Harris ,  Maisha Lara Amaru ,  Lewis Li

IPC: G06N5/04 ,  G06N20/00

Abstract: A computational stratigraphy model may be run for M mini-steps to simulate changes in a subsurface representation across M mini-steps (from 0-th subsurface representation to M-th subsurface representation), with a mini-step corresponding to a mini-time duration. The subsurface representation after individual steps may be characterized by a set of computational stratigraphy model variables. Some or all of the computational stratigraphy model variables from running of the computational stratigraphy model may be provided as input to a machine learning model. The machine learning model may predict changes to the subsurface representation over a step corresponding to a time duration longer than the mini-time duration and output a predicted subsurface representation. The subsurface representation may be updated based on the predicted subsurface representation outputted by the machine learning model. Running of the computational stratigraphy model and usage of the machine learning model may be iterated until the end of the simulation.

公开(公告)号：US10317569B2

公开(公告)日：2019-06-11

申请号：US14483371

申请日：2014-09-11

Applicant: Chevron U.S.A. Inc.

Inventor： Tao Sun ,  Martin Perlmutter ,  Michael James Pyrcz ,  Morgan Sullivan ,  Ashley Harris

IPC: G01V99/00 ,  G06F17/50

Abstract: A new gridding method is disclosed for forward stratigraphic modeling that allows for syndepositional and/or postdepositional fault movement. The new gridding algorithm may represent both the lateral move of structure block, and provide efficiency that is comparable to the structured grid for forward stratigraphy model accessing previous deposited sediments stored in the grid. Embodiments of the disclosed methods allow for structural moves by performing a set of simple operations on the grid. The operations are generally simple, and do not change the overall topology of the grid. Therefore the operation can be easily repeated and the overall topological structure of the grid remains largely unchanged for simple access by the forward stratigraphic model. Further details and advantages of various embodiments of the method are described in more herein.

公开(公告)号：US10287858B2

公开(公告)日：2019-05-14

申请号：US14918217

申请日：2015-10-20

Applicant: CHEVRON U.S.A. INC.

Inventor： Kaveh Ghayour ,  Tao Sun

IPC: E21B43/00 ,  G06F17/10 ,  G01V99/00

Abstract: A method is described for a method for depositional modeling dependent on geological boundary conditions including receiving a process-based depositional model of a siliciclastic formation; determining a type of boundary condition at each boundary of the process-based depositional model wherein the boundary condition on at least one boundary is one of a flux-preserving boundary condition or a discrete boundary condition and wherein the boundary condition accounts for at least one of time-varying inflow of water and sediments into the process-based depositional model, time-varying outflow of water and sediments out of the process-based depositional model, and downstream controls; modeling rates of sediment and water flow over time, dependent on the boundary condition, to create a modeled depositional system; and analyzing the modeled depositional system to identify potential hydrocarbon reservoirs. The method may be executed by a computer system.