System and method for summarizing data on an unstructured grid

• US 9,123,161 B2
• Filed: 05/23/2011
• Issued: 09/01/2015
• Est. Priority Date: 08/04/2010
• Status: Active Grant

• Current Assignee: Exxonmobil Upstream Research Company (Exxon Mobil Corporation)
• Original Assignee: Exxonmobil Upstream Research Company (Exxon Mobil Corporation)
• Inventors: Adair, Neal L., Child, Evan P., Chartrand, Timothy A., Sequeira, Jose J.
• Primary Examiner(s): McDowell, Jr., Maurice L
• Application Number:
  US13/810,869
• Publication Number:
  US 20130120379A1
• Time in Patent Office: 1,562 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: E21B 49/00 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 Class Codes: G01V 1/34 Displaying seismic recordings or visualisation of seismic data or attributes
• CPC Class Codes: G01V 20/00 Geomodelling in general
• CPC Class Codes: G01V 2210/74 Visualisation of seismic data
• CPC Class Codes: G06T 17/05 Geographic models
• CPC Class Codes: G06T 19/00 Manipulating 3D models or images for computer graphics
• CPC Class Codes: G06T 2219/2021 Shape modification

Abstract

A system and method for summarizing data corresponding to properties of interest on an unstructured grid that includes active cells and inactive cells on an output surface. An exemplary method comprises identifying an aggregation direction through a region of interest of the unstructured grid and identifying at least one active cell along the aggregation direction. The exemplary method comprises assigning an aggregated value for the at least one property of interest to a face of the output surface on a line along the aggregation direction based at least in part on the data corresponding to the at least one property of interest for the at least one active cell. The exemplary method further comprises filling the at least one data hole by identifying at least one face associated with an inactive cell on the line along the aggregation direction and assigning it an aggregated value.

Claims

1. A method for summarizing data corresponding to at least one property of interest on an unstructured grid that includes a plurality of active cells and a plurality of inactive cells on an output surface, the method comprising:

identifying an aggregation direction through a region of interest of the unstructured grid;

identifying at least one active cell along the aggregation direction;

summarizing data corresponding to the at least one property of interest for the at least one active cell;

constructing, using a computer system, an output surface based on model topologies represented by the unstructured grid or an intersection of a surface and the unstructured grid;

assigning, using the computer system, an aggregated value for the at least one property of interest to a face of the output surface on a line along the aggregation direction based at least in part on the data corresponding to the at least one property of interest for the at least one active cell;

identifying at least one data hole in the output surface where at least one aggregation has no corresponding face on the output surface, or where at least one output face is not assigned an aggregated value because it is not on the line along the aggregation direction; and

filling, using the computer system, the at least one data hole by identifying at least one face associated with an inactive cell on the line along the aggregation direction and assigning it an aggregated value or by identifying at least one face on the output surface that is not assigned an aggregated value and assigning it an aggregated value corresponding to another face in the cell containing the at least one face that is not assigned an aggregated value.

2. The method recited in claim 1, comprising providing a visualization of values for the property of interest on the output surface.

3. The method recited in claim 1, wherein the output surface comprises a contiguous map of the property of interest on the unstructured grid.

4. The method recited in claim 1, wherein an inactive face in the aggregation direction is a nearest neighbor to any face previously populated on the output surface.

5. The method recited in claim 1, wherein the inactive face is at the same relative distance between two topological layers as the at least one active face along neighboring aggregations.

6. The method recited in claim 1, comprising selecting an output surface face that intersects the unstructured grid along the aggregation direction.

7. The method recited in claim 6, comprising creating nodes for each intersection of the output surface face and the unstructured grid.

8. The method recited in claim 1, wherein identifying the at least one inactive cell comprises providing a line between two active cells along the aggregation direction and identifying whether the at least one inactive cell is intersected by the line.

9. The method recited in claim 1, wherein the aggregation direction comprises along columns, normal to a surface or vertical.

10. The method recited in claim 1, comprising selecting an aggregation method to apply to data corresponding to the property of interest, the aggregation method comprising summing data values for cells along the aggregation direction or averaging data values for cells along the aggregation direction.

11. The method recited in claim 10, wherein the summation or averaging methods are weighted by a property.

12. The method recited in claim 1, comprising selecting at least one external geometric criterion to identify locations of output faces on the output surface.

13. The method recited in claim 1, wherein a map created is compared with another map by difference or ratio.

14. A computer system that is adapted to summarize data corresponding to a property of interest on an unstructured grid that includes a plurality of active cells and a plurality of inactive cells, the computer system comprising:

a processor; and

a non-transitory, computer-readable storage medium that stores computer-readable instructions for execution by the processor, the computer-readable instructions comprising;

code that, when executed by the processor, is adapted to cause the processor to identify an aggregation direction through a region of interest of the unstructured grid;

code that, when executed by the processor, is adapted to cause the processor to identify at least one active cell along the aggregation direction;

code that, when executed by the processor, is adapted to cause the processor to summarize data corresponding to at least one property of interest for the at least one active cell;

code that, when executed by the processor, is adapted to cause the processor to construct an output surface based on model topologies represented by the unstructured grid or an intersection of a surface and the unstructured grid;

code that, when executed by the processor, is adapted to cause the processor to assign an aggregated value for the at least one property of interest to a face of the output surface on a line along the aggregation direction based at least in part on the data corresponding to the at least one property of interest for the at least one active cell;

code that, when executed by the processor, is adapted to cause the processor to identify at least one data hole in the output surface where at least one aggregation has no corresponding face on the output surface, or where at least one output face is not assigned an aggregated value because it is not on the line along the aggregation direction; and

code that, when executed by the processor, is adapted to cause the processor to fill the at least one data hole by identifying at least one face associated with an inactive cell on the line along the aggregation direction and assigning it an aggregated value or by identifying at least one face on the output surface that is not assigned an aggregated value and assigning it an aggregated value corresponding to another face in the cell containing the at least one face that is not assigned an aggregated value.

15. The computer system recited in claim 14, wherein the computer-readable instructions comprise code that, when executed by the processor, is adapted to cause the processor to provide a visualization of values for the property of interest for the output surface.

16. The computer system recited in claim 14, wherein the output surface comprises a contiguous map of the property of interest on the unstructured grid.

17. The computer system recited in claim 14, wherein the inactive cell is a nearest neighbor of the at least one active cell along the aggregation direction.

18. The computer system recited in claim 14, wherein the inactive cell is at the same relative distance between two topological layers as the at least one active face along neighboring aggregations.

19. The computer system recited in claim 14, wherein the computer-readable instructions comprise code that, when executed by the processor, is adapted to cause the processor to select an output surface face that intersects the unstructured grid along the aggregation direction.

20. A method for producing hydrocarbons from an oil and/or gas field using data corresponding to a property of interest of the oil and/or gas field, the method comprising:

identifying an aggregation direction through a region of interest of an unstructured grid that embodies data corresponding to at least one property of interest, the unstructured grid including a plurality of active cells and a plurality of inactive cells;

identifying at least one active cell along the aggregation direction;

summarizing data corresponding to the at least one property of interest for the at least one active cell;

constructing an output surface based on model topologies represented by the unstructured grid or an intersection of a surface and the unstructured grid;

assigning an aggregated value for the at least one property of interest to a face of the output surface on a line along the aggregation direction based at least in part on the data corresponding to the property of interest for the at least one active cell;

identifying at least one data hole in the output surface where at least one aggregation has no corresponding face on the output surface, or where at least one output face is not assigned an aggregated value because it is not on the line along the aggregation direction;

filling the at least one data hole by identifying at least one face associated with an inactive cell on the line along the aggregation direction and assigning it an aggregated value or by identifying at least one face on the output surface that is not assigned an aggregated value and assigning it an aggregated value corresponding to another face in the cell containing the at least one face that is not assigned an aggregated value;

producing a data map that comprises the values for the at least one property of interest on the output surface; and

extracting hydrocarbons from the oil and/or gas field using the data map.