Method For Geophysical and Geological Interpretation of Seismic Volumes using Chronological Panning

• US 20100161232A1
• Filed: 11/20/2009
• Published: 06/24/2010
• Est. Priority Date: 05/22/2008
• Status: Active Grant

• Current Assignee: Exxonmobil Upstream Research Company (Exxon Mobil Corporation)
• Original Assignee: Exxonmobil Upstream Research Company (Exxon Mobil Corporation)
• Inventors: Gillard, Dominique G., Chen, Ganglin, Imhof, Matthias
• Granted Patent: US 8,447,524 B2
• Time in Patent Office: Days
• US Class Current: 702/16
• CPC Class Codes: G01V 1/302 in 3D data cubes
• CPC Class Codes: G01V 1/345 Visualisation of seismic data or attributes, e.g. in 3D cubes
• CPC Class Codes: G01V 2210/48 Other transforms
• CPC Class Codes: G01V 2210/63 Seismic attributes, e.g. amplitude, polarity, instant phase
• CPC Class Codes: G01V 2210/641 Continuity of geobodies
• CPC Class Codes: G01V 2210/643 Horizon tracking
• CPC Class Codes: G01V 2210/66 Subsurface modeling

Abstract

A computer-implemented method is provided for searching and analyzing a seismic data volume acquired in a seismic survey to determine potential for hydrocarbon accumulations in an associated subsurface region. Surfaces describing the seismic data volume are obtained. The surfaces are enumerated. At least one enumerated surface is selected. The at least one selected surface is augmented when the selected surface does not substantially cover an area associated with the seismic data volume. The augmenting is performed until all selected surfaces substantially cover the area. The at least one selected surface is displayed, with geologic or geophysical data associated therewith, for visual inspection or interpretation, or saving digital representations thereof to computer memory or data storage.

Claims

1. A computer-implemented method of searching and analyzing a seismic data volume acquired in a seismic survey to determine potential for hydrocarbon accumulations in an associated subsurface region, comprising:

obtaining surfaces describing the seismic data volume;

enumerating the surfaces;

selecting at least one enumerated surface;

augmenting the at least one selected surface when the selected surface does not substantially cover an area associated with the seismic data volume, said augmenting being performed until all selected surfaces substantially cover the area; and

displaying the at least one selected surface, with geologic or geophysical data associated therewith, for visual inspection or interpretation, or saving digital representations thereof to computer memory or data storage.

2. The method of claim 1, wherein the obtained surfaces are derived from the seismic data volume using skeletonization.

3. The method of claim 1, wherein the at least one selected surface is displayed sequentially.

4. The method of claim 3, wherein the at least one selected surface is displayed sequentially according to an enumeration order of the at least one selected surface.

5. The method of claim 1, wherein geologic or geophysical data within a specified distance or depositional age from each surface is displayed or saved.

6. The method of claim 1, wherein geologic or geophysical data between adjacent surfaces is displayed or saved.

7. The method of claim 1, wherein geologic or geophysical data on each surface is displayed or saved.

8. The method of claim 1, wherein geologic or geophysical data within a specified seismic travel time of each surface is displayed or saved.

9. The method of claim 1, wherein selecting at least one enumerated surface comprises:

defining one or more intervals in a volume in which the surfaces are enumerated;

selecting at least one surface associated with each of the one or more intervals;

for each interval, augmenting the at least one surface when the surface does not substantially cover an area associated with the seismic data volume, said augmenting being performed until all selected surfaces in each selected interval substantially cover the area; and

for each interval, displaying the surface, with geologic or geophysical data associated therewith, for visual inspection or interpretation, or saving digital representations thereof to computer memory or data storage.

10. The method of claim 1, wherein each of the one or more intervals is defined as a region between two substantially horizontal planes in the volume in which the surfaces are enumerated.

11. The method of claim 1, wherein augmenting the at least one surface comprises:

adding seismic data from surfaces having an identifiable relationship with said at least one surface.

12. The method of claim 11, wherein the identifiable relationship is one of a closest geologic age or depth, a nearest older or younger age, a most proximal older or younger depth, and a common geologic or geophysical attribute.

13. The method of claim 1, further comprising interpolating and smoothing data relating to each surface when each surface substantially covers the area, to thereby digitize the surface.

14. The method of claim 1, further comprising using the displayed data to predict or analyze potential for hydrocarbon accumulations.

15. The method of claim 1, further comprising creating a visual representation of the enumerated surfaces.

16. The method of claim 1, wherein the surfaces are displayed or saved as an earth model.

17. The method of claim 1, wherein the obtained surfaces are topologically consistent.

18. The method of claim 17, wherein topologically consistent comprises verifying that surfaces satisfy at least one of (i) no self overlaps, (ii) local consistency, and (iii) global consistency.

19. The method of claim 1, wherein enumerating the surfaces comprises a chronological sorting.

20. The method of claim 1, wherein enumerating the surfaces comprises a top-down enumeration.

21. The method of claim 1, wherein the at least one enumerated surface is selected by selecting every Mth enumerated surface, where M is an integer less than the number of enumerated surfaces.

22. The method of claim 1, wherein the at least one enumerated surface is selected according to one of age and depth.

23. The method of claim 1, further comprising:

predicting a presence of hydrocarbons in the subsurface region using the displayed surfaces; and

managing hydrocarbons based on the predicted presence.

24. The method of claim 1, wherein the at least one enumerated surface is selected by:

generating one or more planes in a volume in which the surfaces are enumerated; and

for each plane, selecting an enumerated surface associated therewith.

25. The method of claim 24, wherein the one or more planes represent one or more seismic return times.

26. The method of claim 24, wherein the one or more planes represent an estimated age or depth in the volume in which the surfaces are enumerated.

27. A computer-implemented method of searching and analyzing a seismic data volume acquired in a seismic survey to determine potential for hydrocarbon accumulations in an associated subsurface region, comprising:

obtaining surfaces describing the seismic data volume;

enumerating the surfaces;

defining one or more intervals in a volume in which the surfaces are enumerated;

selecting at least one surface associated with each of the one or more intervals;

for each interval, augmenting the at least one surface when the surface does not substantially cover an area associated with the seismic data volume, said augmenting being performed until all selected surfaces in each selected interval substantially cover the area; and

for each interval, displaying the surface, with geologic or geophysical data associated therewith, for visual inspection or interpretation, or saving digital representations thereof to computer memory or data storage.

28. The method of claim 27, wherein each of the one or more intervals is defined as a region between two planes in the volume in which the surfaces are arranged.

29. A computer program product having computer executable logic recorded on a tangible, machine readable medium, the computer program product comprising:

code for obtaining surfaces describing a seismic data volume that represents a subsurface region;

code for enumerating the surfaces;

code for selecting at least one enumerated surface;

code for augmenting the at least one selected surface when the selected surface does not substantially cover an area associated with the seismic data volume, said augmenting being performed until all selected surfaces substantially cover the area; and

code for displaying the at least one selected surface, with geologic or geophysical data associated therewith, for visual inspection or interpretation, or saving digital representations thereof to computer memory or data storage.