Method and System Of Interactive Drill Center and Well Planning Evaluation and Optimization

• US 20150094994A1
• Filed: 08/15/2014
• Published: 04/02/2015
• Est. Priority Date: 09/30/2013
• Status: Active Grant

• Current Assignee: Jose J. Sequeira Jr, Rune Musum, Yao-Chou Cheng
• Original Assignee: Jose J. Sequeira Jr
• Inventors: Sequeira, Jose J. Jr., Cheng, Yao-Chou, Musum, Rune
• Granted Patent: US 9,864,098 B2
• Time in Patent Office: Days
• US Class Current: 703/1
• CPC Class Codes: G01V 20/00 Geomodelling in general
• CPC Class Codes: G01V 2210/667 Determining confidence or uncertainty in parameters

Abstract

A method, including: identifying a well target or reservoir segment; defining a dynamic surface grid, the dynamic surface grid being a representation of a ground surface, sea-level, or subsea surface above a reservoir upon which a drill center is locatable, and the dynamic surface grid including a plurality of cells that define potential locations for the drill center; assigning, to each of the plurality of cells of the dynamic surface grid, a value of a drilling or geologic attribute that defines a quality of a drill center position relative to the well target or reservoir segment; and selecting, based on a value of the drilling or geologic attribute, a location for the drill center corresponding to a location represented on the dynamic surface grid.

Claims

1. A method, comprising:

identifying a well target or reservoir segment;

defining a dynamic surface grid, the dynamic surface grid being a representation of a ground surface, sea-level, or subsea surface above a reservoir upon which a drill center is locatable, and the dynamic surface grid including a plurality of cells that define potential locations for the drill center;

assigning, to each of the plurality of cells of the dynamic surface grid, a value of a drilling or geologic attribute that defines a quality of a drill center position relative to the well target or reservoir segment; and

selecting, based on a value of the drilling or geologic attribute, a location for the drill center corresponding to a location represented on the dynamic surface grid.

2. The method of claim 1, further comprising:

creating a first attribute map with a first drilling or geologic attribute in combination with a first well target or reservoir segment;

creating a second attribute map with the first drilling or geologic attribute in combination with a second well target or reservoir segment in the reservoir; and

creating a first composite attribute map by combining the first attribute map and the second attribute map.

3. The method of claim 1, wherein the drilling or geologic attribute is measured depth, and the method further comprises:

determining a well trajectory solution from each of the plurality of cells, which define potential locations for the drill center, to the well target or reservoir segment; and

calculating a measured depth of each of the well trajectory solutions,

wherein the assigning includes assigning corresponding values of the measured depth to each of the plurality of cells that define potential locations for the drill center.

4. The method of claim 1, further comprising:

creating a composite attribute map from a combination of a first attribute map based on a first drilling or geologic attribute and a second attribute map based on a second drilling or geologic attribute, the first drilling or geologic attribute being different from the second drilling or geologic attribute.

5. The method of claim 1, further comprising, after the assigning and before the selecting:

identifying a region on the dynamic surface grid that is less than an entirety of the dynamic surface grid; and

creating a nested dynamic surface grid within the region, the nested dynamic grid having a grid spacing that is smaller than a grid spacing of the dynamic surface grid.

6. The method of claim 5, wherein the creating is automatically initiated.

7. The method of claim 5, wherein the creating is manually initiated.

8. The method of claim 5, further comprising, after the assigning and before the selecting:

determining a well trajectory solution from each of a plurality of cells within the nested dynamic surface grid, which define potential locations for the drill center, to the well target or reservoir segment; and

calculating the value for the drilling or geologic attribute of each of the well trajectory solutions,

wherein the assigning includes assigning corresponding values of the drilling or geologic attribute to each of the plurality of cells within the nested dynamic surface grid that define potential locations for the drill center.

9. The method of claim 5, wherein the identifying includes comparing values of the drilling or geologic attribute assigned to the cells of the dynamic surface grid to a predetermined threshold.

10. The method of claim 1, further comprising, after the assigning and before the selecting,

creating a composite grid with finer grid spacing than the dynamic surface grid.

11. The method of claim 1, wherein the drill center is an onshore pad, well site, offshore platform, drillship or rig, or subsea template.

12. The method of claim 1, wherein the drilling or geologic attribute is at least one of measured depth, accumulated dogleg severity, drilling difficulty index, cost, or reservoir preformation.

13. The method of claim 1, wherein the value of the drilling or geologic attribute is a monetized value.

14. The method of claim 1, wherein the selecting includes identifying at least two drill centers.

15. The method of claim 1, further comprising managing hydrocarbons from a well disposed at the drill center.

16. The method of claim 4, further comprising:

adjusting at least one well target or reservoir segment;

refining only those cells of the dynamic surface grid affected by the adjusting; and

updating the composite attribute map based on the adjusting and refining.

17. The method of claim 1, wherein

the identifying includes identifying a plurality of well targets or reservoir segments, and

the assigning includes assigning, to each of the plurality of cells of the dynamic surface grid, a value of a drilling or geologic attribute that defines a quality of a drill center position relative to each of the plurality of well targets or reservoir segments, and the method further comprises:

generating an attribute map for each of the well targets or reservoir segments; and

combining the attribute maps.

18. A non-transitory computer readable storage medium encoded with instructions, which when executed by a computer causes the computer to execute a method, comprising:

identifying a well target or reservoir segment;

defining a dynamic surface grid, the dynamic surface grid being a representation of a ground surface, sea-level, or subsea surface above the reservoir upon which a drill center is locatable, and the dynamic surface grid including a plurality of cells that define potential locations for the drill center;

assigning, to each of the plurality of cells of the dynamic surface grid, a value of a drilling or geologic attribute that defines a quality of a drill center position relative to the well target or reservoir segment; and

selecting, based on a value of the drilling or geologic attribute, a location for the drill center corresponding to a location represented on the dynamic surface grid.

19. An apparatus, comprising:

a memory device that stores executable instructions; and

a processing circuit that executes the instructions in order to

identify a well target or reservoir segment,

define a dynamic surface grid, the dynamic surface grid being a representation of a ground surface, sea-level, or subsea surface above the reservoir upon which a drill center is locatable, and the dynamic surface grid including a plurality of cells that define potential locations for the drill center,

assign, to each of the plurality of cells of the dynamic surface grid, a value of a drilling or geologic attribute that defines a quality of a drill center position relative to the well target or reservoir segment, and

select, based on a value of the drilling or geologic attribute, a location for the drill center corresponding to a location represented on the dynamic surface grid.