Method and system for reservoir simulations based on an area of interest

Patent metadata

Field	Value
Publication number	US-2022082728-A1
Application number	US-202017019921-A
Country	US
Kind code	A1
Filing date	Sep 14, 2020
Priority date	Sep 14, 2020
Publication date	Mar 17, 2022
Grant date	—

Abstract

A method may include obtaining a selection of various user-defined coarsening parameters. The user-defined coarsening parameters may include a predetermined fine-grid region in a geological region of interest and a predetermined cell distance. The method may further include determining an area of interest (AOI) mask for the geological region of interest based on the predetermined fine-grid region. The method may further include determining a geological property mask based on the user-defined coarsening parameters. The geological property mask may correspond to a predetermined geological feature within the predetermined cell distance from the AOI mask. The method may further include generating a coarsened grid model using grid model data and well data for the geological region of interest. The method may further include performing a reservoir simulation of the geological region of interest using the coarsened grid model.

First claim

What is claimed:

1 . A method, comprising:
obtaining, by a computer processor, a first selection of a first plurality of user-defined coarsening parameters, wherein the first plurality of user-defined coarsening parameters comprise a predetermined fine-grid region in a geological region of interest and a first predetermined cell distance; determining, by the computer processor, an area of interest (AOI) mask for the geological region of interest based on the predetermined fine-grid region; determining, by the computer processor, a geological property mask based on the first plurality of user-defined coarsening parameters, wherein the geological property mask corresponds to one or more predetermined geological features within the first predetermined cell distance from the AOI mask; generating, by the computer processor, a first coarsened grid model using grid model data and well data for the geological region of interest, wherein the first coarsened grid model comprises one or more coarsened regions based on the AOI mask and the geological property mask; and performing, by the computer processor, a reservoir simulation of the geological region of interest using the first coarsened grid model.

2 . The method of claim 1 , further comprising:
determining a well mask for the geological region of interest based on the first plurality of user-defined coarsening parameters, wherein the well mask is determined based one or more wells being within a second predetermined cell distance from the AOI mask, and wherein the first coarsened grid model is generated using the well mask.

3 . The method of claim 1 , further comprising:
determining a coarsening mask for the geological region of interest based on the first plurality of user-defined coarsening parameters, wherein the coarsening mask is determined based on a second plurality of cells being within a second predetermined cell distance from the boundary of the AOI mask, wherein the first coarsened grid model comprises a first coarsening level, a second coarsening level that has greater coarsening than the first coarsening level, and a fine-grid resolution, and wherein the coarsening mask corresponds to the first coarsening level.

4 . The method of claim 1 , further comprising:
obtaining, from the user device, a plurality of geographic coordinates that define the predetermined fine-grid region within a fine-grid model, wherein the fine-grid model provides a full-field reservoir simulation of the geological region of interest, and wherein the AOI mask corresponds to a second plurality of cells in the first coarsened grid model that are not coarsened.

5 . The method of claim 1 , further comprising:
determining a plurality of geological property values for a plurality of geological features within the geological region of interest, wherein the plurality of geological features are selected from a group consisting of one or more fractures, one or more faults, and one or more channels, and wherein the plurality of geological property values above a predetermined threshold and with the first predetermined cell distance correspond to non-coarsened regions in the first coarsened grid model.

6 . The method of claim 1 ,
wherein the first selection of the first plurality of user-defined coarsening parameters is obtained by a user device coupled to a reservoir simulator, and wherein the first selection corresponds to one or more user inputs to a graphical user interface that is provided by the user device.

7 . The method of claim 1 , further comprising:
obtaining, in response to performing the reservoir simulation, a second selection of a second plurality of user-defined coarsening parameters, wherein the second plurality of user-defined coarsening parameters comprise an adjusted fine-grid region and an adjusted cell distance; and generating a second coarsened grid model using the grid model data and the well data, wherein second coarsened grid model comprises one or more adjusted coarsening regions based on the adjusted fine-grid region and the adjusted cell distance.

8 . The method of claim 1 ,
obtaining historical well data regarding a well within the geological region of interest, wherein the reservoir simulation determines simulated well data regard regarding the well, and wherein the historical well data and the simulated well data are compared by a reservoir simulator.

9 . A system, comprising:
a wellhead coupled to a wellbore; a flow rate sensor coupled to the wellhead; and a reservoir simulator comprising a computer processor and coupled to the flow rate sensor, wherein the reservoir simulator comprises functionality for:
obtaining a first selection of a first plurality of user-defined coarsening parameters, wherein the first plurality of user-defined coarsening parameters comprise a predetermined fine-grid region in a geological region of interest and a first predetermined cell distance;
determining an area of interest (AOI) mask for the geological region of interest based on the predetermined fine-grid region;
determining a geological property mask based on the first plurality of user-defined coarsening parameters, wherein the geological property mask corresponds to one or more predetermined geological features within the first predetermined cell distance from the AOI mask;
generating a first coarsened grid model using flow rate data from the flow rate sensor and well data for the geological region of interest, wherein the first coarsened grid model comprises one or more coarsened regions based on the AOI mask and the geological property mask; and
performing a reservoir simulation of the geological region of interest using the first coarsened grid model.

10 . The system of claim 9 , wherein the reservoir simulator further comprises functionality for:
determining a well mask for the geological region of interest based on the first plurality of user-defined coarsening parameters, wherein the well mask is determined based one or more wells being within a second predetermined cell distance from the AOI mask, and wherein the first coarsened grid model is generated using the well mask.

11 . The system of claim 9 , wherein the reservoir simulator further comprises functionality for:
determining a coarsening mask for the geological region of interest based on the first plurality of user-defined coarsening parameters, wherein the coarsening mask is determined based on a second plurality of cells being within a second predetermined cell distance from the boundary of the AOI mask, wherein the first coarsened grid model comprises a first coarsening level, a second coarsening level that has greater coarsening than the first coarsening level, and a fine-grid resolution, and wherein the coarsening mask corresponds to the first coarsening level.

12 . The system of claim 9 , wherein the reservoir simulator further comprises functionality for:
obtaining, from the user device, a plurality of geographic coordinates that define the predetermined fine-grid region within a fine-grid model, wherein the fine-grid model provides a full-field reservoir simulation of the geological region of interest, and wherein the AOI mask corresponds to a second plurality of cells in the first coarsened grid model that are not coarsened.

13 . The system of claim 9 , wherein the reservoir simulator further comprises functionality for:
determining a plurality of geological property values for a plurality of geological features within the geological region of interest, wherein the plurality of geological features are selected from a group consisting of one or more fra

Assignees

• Saudi Arabian Oil Co

Inventors

• Crumpton Paul
• Cancelliere Michel

Classifications

• E21B43/00 Primary

  Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (applicable only to water E03B) · CPC title

• G01V2210/663

  Modeling production-induced effects · CPC title

• G06F2111/10

  Numerical modelling · CPC title

• G06F2113/08

  Fluids · CPC title

• E21B49/00

  Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells · CPC title