Method and system for underground treatment of materials

• US 7,360,595 B2
• Filed: 05/08/2002
• Issued: 04/22/2008
• Est. Priority Date: 05/08/2002
• Status: Expired due to Fees

• Current Assignee: Effective Exploration LLC
• Original Assignee: CDX Gas LLC (EnerVest Ltd.)
• Inventors: Rial, Monty H., Zupanick, Joseph A.
• Primary Examiner(s): Bates; Zakiya W.
• Application Number:
  US10/142,817
• Publication Number:
  US 20050087340A1
• Time in Patent Office: 2,176 Days
• Field of Search: 166/268, 166270-2702, 166400-403, 1662721-2727, 166/269, 166/275, 166/279, 166/310, 166/50, 166/313
• US Class Current: 166/245
• CPC Class Codes: E21B 41/0064 Carbon dioxide sequestration storing fluids in porous layers B65G5/005
• CPC Class Codes: E21B 43/305 comprising at least one inclined or horizontal well
• CPC Class Codes: Y02C 20/40 of CO2

Abstract

A method for underground treatment of subsurface materials comprises providing an injection pattern and a recovery pattern, the injection pattern and the recovery pattern located proximate to a subsurface treatment zone and at least one of the injection pattern and the recovery pattern comprising a plurality of lateral bores extending from a main bore. A treatment solution is injected through the injection pattern and recovered through the recovery pattern.

Claims

1. A method for underground treatment of subsurface materials, comprising:

providing an injection pattern and a recovery pattern, the injection pattern and the recovery pattern coupled to a common bore and located proximate to a subsurface treatment zone and at least one of the injection pattern and the recovery pattern comprising a plurality of lateral bores extending from a main bore;

injecting a treatment solution through the injection pattern;

recovering the treatment solution through the recovery pattern; and

selectively preventing flow of the treatment solution through a point within one or more of the injection pattern, recovery pattern or common bore using at least one packer.

2. The method of claim 1, wherein the injection pattern and the recovery pattern both comprise a plurality of lateral bores extending from a main bore.

3. The method of claim 1, wherein at least one of the injection pattern and the recovery pattern are substantially horizontal.

4. The method of claim 1, wherein the subsurface treatment zone comprises an undergound resource.

5. The method of claim 1 further comprising collecting the treatment solution in an enlarged cavity coupled to the recovery pattern.

6. A method for underground treatment of subsurface materials, comprising;

providing an injection pattern and a recovery pattern, the injection pattern and the recovery pattern coupled to a common bore and located proximate to a subsurface treatment zone and at least one of the injection pattern and the recovery pattern comprising a plurality of lateral bores extending from a horizontal bore;

injecting a treatment solution through the injection pattern;

recovering the treatment solution through the recovery pattern; and

wherein at least one of the injection pattern and the recovery pattern comprise a pinnate pattern.

7. The method of claim 6, wherein the injection pattern and the recovery pattern both comprise a pinnate pattern.

8. A method for underground treatment of subsurface materials, comprising;

an injection pattern and a recovery pattern, the injection pattern and the recovery pattern coupled to a common bore and located proximate to a subsurface tretment zone and at least one of the injection pattern and the recovery pattern comprising a plurality of lateral bores extending from a horizontal bore;

injecting a treatment solution through the injection pattern;

recovering a treatment solution through the recovery pattern; and

wherein the subsurface treatment zone comprises a zone of contamination.

9. A method for underground treatment of subsurface materials, comprising;

an injection pattern and a recovery pattern coupled to a common bore, the injection pattern and the recovery pattern located proximate to a subsurface treatment zone and at least one of the injection pattern and the recovery pattern comprising a plurality of lateral bores extending from a horizontal bore;

a treatment solution, the treatment solution operable to be injected through the injection pattern and recovered through the recovery pattern; and

wherein the underground resource comprises a precious metal deposit.

10. A system comprising:

an injection pattern and a recovery pattern coulded to a common bore, the injection pattern and the recovery pattern located proximate to a subsurface treatment zone and at least one of the injection pattern and the recovery pattern comprising a plurality of lateral bores extending from a horizontal bore;

a treatment solution, the treatment solution operable to be injected through the injection pattern and recovered through the recovery pattern; and

a packer operable to selectively prevent flow of the treatment solution through a point within one or more of the injection pattern, recovery pattern or common bore.

11. The system of claim 10, wherein the injection pattern and the recovery pattern both comprise a plurality of lateral bores extending from a horizontal bore.

12. The system of claim 10, wherein at least one of the injection pattern and the recovery pattern are substantially horizontal.

13. The system of claim 10, wherein the subsurface treatment zone comprises an underground resource.

14. The system of claim 10 further comprising an enlarged cavity coupled to the recovery pattern.

15. A system for underground treatment of subsurface materials, comprising;

an injection pattern and a recovery pattern coupled to a common bore, the injection pattern and the recovery pattern located proximate to a subsurface treatment zone and at least one of the injection pattern and the recovery pattern comprising a plurality of lateral bores extending from a horizontal bore;

a treatment solution, the treatment solution operable to be injected through the injection pattern and recovered through the recovery pattern; and

wherein at least one of the injection pattern and the recovery pattern comprise a pinnate pattern.

16. The system of claim 15, wherein the injection pattern and the recovery pattern both comprise a pinnate pattern.

17. A system for underground treatment of subsurface materials, comprising:

an injection pattern and a recovery pattern coupled to a common bore, the injection pattern and the recovery pattern located proximate to a subsurface treatment zone and at least one of the injection pattern and the recovery pattern comprising a plurality of lateral bores extending from a horizontal bore;

a treatment solution, the treatment solution operable to be injected through the injection pattern and recovered through the recovery pattern; and

wherein the subsurface treatment zone comprises a zone of contamination.

18. A system for underground treatment of subsurface materials, comprising:

an injection pattern and a recovery pattern coupled to a common bore, the injection pattern and the recovery pattern located proximate to a subsurface treatment zone and at least one of the injection pattern and the recovery pattern comprising a plurality of lateral bores extending from a horizontal bore;

a treatment solution, the treatment solution operable to be injected through the injection pattern and recovered through the recovery pattern;

wherein the subsurface treatment zone comprises an underground resource; and

wherein the underground resource comprises a precious metal desposit.

19. A method for underground treatment of subsurface minerals, comprising:

injecting treatment solution through a horizontal injection bore, the horizontal injection bore being drilled from a first well bore extending from above the horizontal injection bore;

recovering the treatment solution through a horizontal recovery bore vertically offset from the horizontal injection bore, the horizontal recovery bore being drilled from the first well bore;

injecting a second treatment solution through a second horizontal injection bore; and

recovering the second treatment solution through the horizontal recovery bore.

20. The method of claim 19 further comprising collecting the treatment solution in an enlarged cavity coupled to the recovery bore.

21. The method of claim 19 wherein the injection bore and the recovery bore communicate with a common bore;

and

wherein injecting a treatment solution through a horizontal injection bore comprises injecting the treatment solution through the horizontal injection bore while concurrently blocking flow from the common bore into the recovery bore.

22. A method for underground treatment of subsurface minerals, comprising:

injecting a treatment solution into an underground treatment zone;

collecting the treatment solution from the underground treatment zone in an enlarged cavity coupled to a recovery bore, wherein at least a portion of the enlarged cavity is below the underground treatment zone; and

recovery treatment solution from the cavity with a rod pump extending down a borehole in communication with the recovery bore and horizontally offset from the common bore.

23. The method of claim 22 further comprising recovering the treatment solution through the recovery bore.

24. The method of claim 22 wherein injecting a treatment solution into an underground formation comprises injecting the treatment solution through an injecting bore, the injection bore and the recovery bore in communication with a common bore, and concurrently blocking flow from the common bore into the recovery bore.

25. The method of claim 24 further comprising recovering the treatment solution through the recovery bore and concurrently blocking flow from the common bore into the injection bore.

26. A method for underground treatment of subsurface minerals, comprising:

injecting a treatment solution into an underground treatment zone;

collecting the treatment solution from the underground treatment zone in an enlarged cavity coupled to a recovery bore, wherein at least a portion of the enlarged cavity is below the underground treatment zone;

wherein injecting a treatment solution into an underground formation comprises injecting the treatment solution through an injection bore, the injection bore and the recovery bore in communication with a common bore, and concurrently blocking flow from the common bore into to the recovery bore; and

wherein blocking flow into the recovery bore comprises blocking flow with at least one of a packer or a valve in the common bore.

27. A method for underground treatment of subsurface minerals, comprising:

injecting a treatment solution into an underground treatment zone;

collecting the treatment solution from the underground treatment zone in an enlarged cavity coupled to a recovery bore, wherein at least a portion of the enlarged cavity is below the underground treatment zone;

wherein injecting a treatment solution into an underground formation comprises injecting the treatment solution through an injection bore, the injection bore and the recovery bore in communication with a common bore, and concurrently blocking flow from the common bore into to the recovery bore;

recovering the treatment solution through the recovery bore and concurrently blocking flow from the common bore into the injection bore; and

wherein blocking flow into the injection bore comprises blocking flow with at least one of a packer or a valve in the injection bore.

28. A method for underground treatment of subsurface minerals, comprising:

injecting a treatment solution into an underground treatment zone;

collecting the treatment solution from the underground treatment zone in an enlarged cavity coupled to a recovery bore, wherein at least a portion of the enlarged cavity is below the underground treatment zone;

wherein injecting a treatment solution into an underground formation comprises injecting the treatment solution through an injection bore, the injection bore and the recovery bore in communication with a common bore, and concurrently blocking flow from the common bore into to the recovery bore; and

recovering treatment solution from the cavity with a rod pump extending down the common bore.

29. A method for underground treatment of subsurface minerals, comprising:

injecting a treatment solution into an underground treatment zone;

collecting the treatment solution from the underground treatment zone in an enlarged cavity coupled to a recovery bore, wherein at least a portion of the enlarged cavity is below the underground treatment zone; and

wherein injecting a treatment solution into an underground treatment zone comprises injecting a first treatment solution through a first injection bore and injecting a second treatment solution through a second injection bore.

30. The method of claim 29 wherein the first injection bore and the second injection bore are in communication with a common bore, and wherein injecting a second treatment solution through a second injection bore comprises injecting the second treatment solution while concurrently blocking flow from the common bore into the first injection bore.

31. A method for underground treatment of subsurface minerals, comprising:

injecting a treatment solution into an underground treatment zone;

collecting the treatment solution from the underground treatment zone in an enlarged cavity coupled to a recovery bore, wherein at least a portion of the enlarged cavity is below the underground treatment zone; and

wherein concurrently blocking flow from the common bore into the recovery bore comprises inserting a body into the common bore above the recovery bore, the body adapted to substantially block passage of fluids through the common bore past the body to the recovery bore; and

further comprising aligning a lateral inlet of the body with the recovery bore to allow passage of fluids from the recovery bore to an outlet of the body and moving the inlet out of alignment with the recovery bore to substantially block passage of fliuds from the recovery bore to the outlet of the body.

32. A system for underground treatment of a zone, comprising:

a horizontal well bore, the horizontal well bore including a plurality of cavities; and

a flow control device positioned in the horizontal well bore and adapted to substantially block flow along a length of the horizontal well bore; and

a rod pump extending down a boreble including one of the cavities of the horizontal bore.

33. The system of claim 32 further comprising an injection bore adapted to inject a treatment solution into the zone.

34. The system of claim 33 further comprising a common bore coupled to the injection bore and the horizontal bore;

and

wherein the flow control device is adapted to prevent flow of fluids from the common bore into the horizontal bore.

35. The system of claim 32 a pump inlet proximate to the horizontal well bore adapted to withdraw a treatment solution from the horizontal bore.