IINTEGRATING RESERVOIR MODELING WITH MODELING A PERTURBATION

• US 20130110486A1
• Filed: 11/01/2012
• Published: 05/02/2013
• Est. Priority Date: 11/01/2011
• Status: Active Grant

• Current Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Original Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Inventors: HABASHY, TAREK M., VIK, TORBJRN, OMERAGIC, DZEVAT, POLYAKOV, VALERY
• Granted Patent: US 10,450,860 B2
• Time in Patent Office: Days
• US Class Current: 703/10
• 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

Abstract

A method for characterizing a subterranean formation traversed by a wellbore includes generating a reservoir model using data collected from the formation, generating a perturbation object comprising a perturbation of the wellbore, integrating the perturbation object with the reservoir model, and forming a geological model wherein the perturbation object is integrated in the reservoir model.

Claims

1. A method for characterizing a subterranean formation traversed by a borehole, comprising:

generating a reservoir model using data describing the formation;

generating a perturbation object representing a perturbation of the wellbore;

integrating the perturbation object with a geological model; and

forming the reservoir model with the perturbation object integrated with the geological model into the reservoir model.

2. The method of claim 1, wherein the perturbation object is an invasion object, and wherein the perturbation is an invasion.

3. The method of claim 1, wherein the perturbation object is a borehole object, and wherein the perturbation is a shape change of a borehole.

4. The method of claim 1, further comprising:

modifying the perturbation object while forming the reservoir model or modifying the data or both.

5. The method of claim 1,

wherein the data is log data gathered while drilling the borehole or after drilling the borehole or both, and

wherein integrating the perturbation object with the geological model comprises calculating, from the log data, revised log data accounting for the perturbation.

6. The method of claim 1, wherein integrating the perturbation object with the geological model further comprises:

revising a geometry and a physical property of the perturbation object using well logs or images or both.

7. The method of claim 1, wherein integrating the perturbation object with the geological model further comprises:

revising a geometry and a physical property of the perturbation object using simulation or inversion of well logs or images or both.

8. The method of claim 5, wherein the log data comprises resistivity measurements and wherein the revised log data comprises revised resistivity measurements that account for an invasion of mud flow according to the invasion object.

9. The method of claim 1, further comprising:

revising a geometry and a physical property of the reservoir model using the data collected over time.

10. The method of claim 1, further comprising:

revising a geometry and a physical property of the reservoir model using simulation or inversion of well log or images or both.

11. The method of claim 1, wherein forming the reservoir model comprises:

displaying a time lapse change in an invasion shape.

12. The method of claim 1, further comprising:

obtaining an interface of the reservoir modeling package comprising the reservoir model and an invasion model.

13. The method of claim 1, wherein the reservoir model comprises a perturbation object shape identifier and a parameter defined for a perturbation object shape.

14. The method of claim 1, wherein generating the perturbation object comprises:

importing a definition of a perturbation object from a file, an application, an algorithm integrated with the reservoir modeling package, or a combination thereof.

15. The method of claim 1, wherein generating the perturbation object comprises:

analyzing the data to create an initial perturbation object;

gathering measured log data while drilling the borehole or after drilling the borehole or both;

generating synthetic log data from the initial invasion object using a physics based simulation;

comparing the measured log data with the synthetic log data to identify a discrepancy;

modifying a shape or a physical property or both of the initial perturbation object; and

creating a revised perturbation object based on the discrepancy.

16. A system for characterizing a subterranean formation traversed by a wellbore, comprising:

a computer processor;

a data repository for storing a perturbation object representing a perturbation;

a perturbation object modeling module, executing on the computer processor, configured to;

generate the perturbation object; and

integrate the perturbation object with a geological model; and

a reservoir modeling package, executing on the computer processor, comprising;

a modeling module configured to generate the reservoir model using data describing the formation; and

an interface configured to display a reservoir model having the perturbation object is integrated in the geological model.

17. The system of claim 16, further comprising:

a physics based simulator configured to simulate a well log based on a model comprising a reservoir boundary, a reservoir property, an invasion geometry, an invasion property, a borehole geometry, and a borehole property,

wherein the perturbation is an invasion and wherein the perturbation object is an invasion object.

18. The system of claim 16, further comprising:

an inversion module configured to compare gathered log data with a physics based simulation response to create a revised reservoir model comprising a geometry and a physical property of a formation, an invasion, a borehole, or a combination thereof.

19. The system of claim 18, wherein the gathered log data is gathered at different times.

20. The system of claim 16, wherein the perturbation object is an invasion object, wherein the invasion object comprises a plurality of invasion events, and wherein each invasion event of the plurality of invasion events describes the invasion at a particular moment in time corresponding to the invasion event.

21. The system of claim 16, wherein the perturbation object is an invasion object, wherein the invasion object comprises:

an invasion profile definition describing a measured depth and a shape of the invasion.

22. The system of claim 21, wherein the invasion object further comprises:

a first invasion shape definition describing a surface of the invasion object, wherein the invasion shape definition is a concatenation of a plurality of invasion profile definitions, and wherein the invasion profile definition is one of the plurality of invasion profile definitions.

23. The system of claim 22, wherein the invasion object further comprises:

an invasion front definition comprising the first invasion shape definition and a second invasion shape definition, wherein the invasion front defines a volume between a first invasion shape defined by the first invasion shape definition and a second invasion shape defined by the second invasion shape definition.

24. The system of claim 23, further comprising:

an inversion module configured to construct the invasion front.

25. The system of claim 16, wherein the perturbation object is an invasion object, and wherein the invasion object comprises:

an invasion zone definition comprising the invasion front definition, wherein the invasion zone definition describes an invasion volume of the invasion between two measured depths of the trajectory.

26. The system of claim 22, wherein the interface comprises:

a graphical user interface for interactively modifying the perturbation object.

27. The system of claim 26, wherein the graphical user interface is configured to:

receive a selection and movement of a point, defined for the perturbation object, on a display of the reservoir model; and

initiate a modification of the perturbation object based on the selection and movement of the point.

28. A non-transitory computer readable medium comprising computer readable program code embodied therein for:

generating a reservoir model using data describing a subterranean formation;

generating a perturbation object representing a perturbation of the wellbore;

integrating the perturbation object with a geological model; and

forming the reservoir model with the perturbation object integrated with the geological model into the reservoir model.

29. The non-transitory computer readable medium of claim 28, wherein the computer readable program code is further for:

interactively modifying the perturbation object while displaying the reservoir model.

30. The non-transitory computer readable medium of claim 28, wherein the computer readable program code is further for:

programmatically modifying the perturbation object while displaying the reservoir model.

31. The non-transitory computer readable medium of claim 30, wherein the computer readable program code is further for:

programmatically modifying the cylindrical object while displaying the geological model and perturbation model.

32. The non-transitory computer readable medium of claim 28, wherein the computer readable program code is further for:

communicating with a physics-based simulator via the Internet based on an extensible mark-up language protocol.