Method for determination of real subsoil geological formation

Patent metadata

Field	Value
Publication number	US-11995382-B2
Application number	US-202017092106-A
Country	US
Kind code	B2
Filing date	Nov 6, 2020
Priority date	Nov 8, 2019
Publication date	May 28, 2024
Grant date	May 28, 2024

Abstract

The present disclosure relates to a method for determination of a real subsoil geological formation. In at least one embodiment, the method includes receiving a model representing the real subsoil, determining a first stochastic trajectory of a first fluvial formation in said model, defining a constraint zone comprising said first fluvial formation, and determining a second stochastic trajectory of a second fluvial formation in said model within said constraint zone based on a stochastic process.

First claim

The invention claimed is:

1. A method for determination of a real subsoil geological formation, comprising:
receiving a model representing the real subsoil geological formation;
determining a first stochastic trajectory of a first fluvial formation in said model;
defining a constraint zone comprising said first fluvial formation;
determining a second stochastic trajectory of a second fluvial formation in said model within said constraint zone based on a stochastic process;
reiterating the defining the constraint zone and the determining the second stochastic trajectory of the second fluvial formation, and in said reiteration, the second fluvial formation is taken as the first fluvial formation and a third stochastic trajectory of a third fluvial formation is taken as the second stochastic trajectory of the second fluvial formation; and
outputting a complete model to a computing device, the complete model providing data indicating at least the first, second, and third fluvial formations as real subsoil geological formations, which is usable to identify a hydrocarbon reservoir based on the first, second, and third fluvial formations and enable an industrial production plan for production of hydrocarbons based on the complete model.

2. The method of claim 1 , wherein edges of the constraint zone are within a predetermined distance to the first stochastic trajectory of the first fluvial formation.

3. The method of claim 1 , wherein the determining the second stochastic trajectory of the second fluvial formation is reiterated a predetermined number of times.

4. The method of claim 2 , wherein the determining the second stochastic trajectory of the second fluvial formation comprises a displacement of the constraint zone according to a given direction between iterations.

5. The method of claim 1 , wherein determining the second stochastic trajectory comprises:
determining a point of the model based on the stochastic process; and
if said point is outside the constraint zone, reiterating the determining a point of the model based on the stochastic process, otherwise, adding said point to the second stochastic trajectory,
wherein if the reiteration of the determining a point of the model based on the stochastic process exceeds a predetermined number, the determining of the second stochastic trajectory is reinitialized.

6. The method of claim 1 , wherein determining the second stochastic trajectory comprises:
determining a point of the second stochastic trajectory; and
if said point is outside the constraint zone, changing coordinates of said point to a closest point of the constraint zone.

7. The method of claim 1 , wherein determining the second stochastic trajectory comprises:
determining a point of the second stochastic trajectory; and
if said point is outside the constraint zone, reiterating the determining a point of the model based on the stochastic process,
wherein if the reiteration of the determining a point of the model based on the stochastic process exceeds a predetermined number, coordinates of said point are changed to a closest point of the constraint zone.

8. A device for determination of a real subsoil geological formation, comprising:
an input interface of a computer configured to receive a model representing the real subsoil geological formation;
a computer circuit configured to determine a first stochastic trajectory of a first fluvial formation in said model;
a computer circuit configured to define a constraint zone comprising said first fluvial formation;
a computer circuit configured to determine a second stochastic trajectory of a second fluvial formation in said model within said constraint zone based on a stochastic process, and to reiterate the defining the constraint zone and the determining the second stochastic trajectory of the second fluvial formation, and in said reiteration, the second fluvial formation is taken as the first fluvial formation and a third stochastic trajectory of a third fluvial formation is taken as the second stochastic trajectory of the second fluvial formation; and
a computer circuit configured to output a complete model to a computing device, the complete model providing data indicating at least the first, second, and third fluvial formations as real subsoil geological formations, which is usable to identify a hydrocarbon reservoir based on the first, second, and third fluvial formations and enable an industrial production plan for production of hydrocarbons based on the complete model.

9. A non-transitory computer readable storage medium, having stored thereon a computer program comprising program instructions, the computer program being loadable into a data-processing device and adapted to cause the data-processing device perform a method for determination of a real subsoil geological formation when the computer program is run by the data-processing device, the method comprising:
receiving a model representing the real subsoil geological formation;
determining a first stochastic trajectory of a first fluvial formation in said model;
defining a constraint zone comprising said first fluvial formation;
determining a second stochastic trajectory of a second fluvial formation in said model within said constraint zone based on a stochastic process;
reiterating the defining the constraint zone and the determining the second stochastic trajectory of the second fluvial formation, and in said reiteration, the second fluvial formation is taken as the first fluvial formation and a third stochastic trajectory of a third fluvial formation is taken as the second stochastic trajectory of the second fluvial formation; and
output a complete model to a computing device, the complete model providing data indicating at least the first, second, and third fluvial formations as real subsoil geological formations, which is usable to identify a hydrocarbon reservoir based on the first, second, and third fluvial formations and enable an industrial production plan for production of hydrocarbons based on the complete model.

10. The non-transitory computer readable storage medium of claim 9 , wherein edges of the constraint zone are within a predetermined distance to the first stochastic trajectory of the first fluvial formation.

11. The non-transitory computer readable storage medium of claim 9 , wherein the determining the second stochastic trajectory of the second fluvial formation is reiterated a predetermined number of times.

12. The non-transitory computer readable storage medium of claim 10 , wherein the determining the second stochastic trajectory of the second fluvial formation comprises a displacement of the constraint zone according to a given direction between iterations.

13. The non-transitory computer readable storage medium of claim 9 , wherein determining the second stochastic trajectory comprises:
determining a point of the model based on the stochastic process; and
if said point is outside the constraint zone, reiterating the determining a point of the model based on the stochastic process, otherwise, adding said point to the second stochastic trajectory,
wherein if the reiteration of the determining a point of the model based on the stochastic process exceeds a predetermined number, the determining of the second stochastic trajectory is reinitialized.

14. The non-transitory computer readable storage medium of claim 9 , wherein determining the second stochastic trajectory comprises:
determining a point of the second stochastic trajectory; and
if said point is outside the constraint zone, changing coordinates of said point to a closest point of the constraint zone.

Assignees

• Total Se
• Totalenergies Onetech

Inventors

• Massonnat Gérard
• Gal Cédric

Classifications

• G01V2210/661

  Model from sedimentation process modeling, e.g. from first principles · CPC title

• G06F30/20 Primary

  Design optimisation, verification or simulation (optimisation, verification or simulation of circuit designs G06F30/30) · CPC title

• G01V20/00 Primary

  Geomodelling in general · CPC title

• G06F2111/04

  Constraint-based CAD · CPC title

• G06F2111/08

  Probabilistic or stochastic CAD · CPC title