Method and system for treating a subterranean formation

• US 8,281,860 B2
• Filed: 05/21/2007
• Issued: 10/09/2012
• Est. Priority Date: 08/25/2006
• Status: Active Grant

• Current Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Original Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Inventors: Boney, Curtis, Ajumogobia-Bestman, Somiari
• Primary Examiner(s): DiTrani, Angela M
• Application Number:
  US11/751,377
• Publication Number:
  US 20080047707A1
• Time in Patent Office: 1,968 Days
• Field of Search: 166/54.1, 166/193, 166/284
• US Class Current: 166/298
• CPC Class Codes: E21B 34/063 Valve or closure with destructible element, e.g. frangible disc E21B34/103 takes precedence
• CPC Class Codes: E21B 43/114 Perforators using direct fluid action on the wall to be perforated, e.g. abrasive jets

Abstract

A system that is usable with a well includes a tubular string, which includes a jetting sub. Fluid is communicated outside an annular region that surrounds the string to a first zone of the well for purposes of treating the first zone. During the communication of the fluid through the annular region, fluid is communicated through the tubing string and through the jetting sub to perforate a second zone of the well.

Claims

1. A method usable with a well, comprising:

treating a first zone of the well; and

during the treating, perforating a second zone of the well;

wherein the perforating comprises;

providing a coiled tubing string or a jointed tubing, the coiled tubing string or the jointed tubing having multiple jetting subs spaced apart along a length of the coiled tubing string or the jointed tubing and associated with multiple zones of the well, one of the jetting subs being associated with the second zone; and

deploying an object in the coiled tubing string or the jointed tubing to block fluid communication in the coiled tubing string or the jointed tubing below the one jetting sub associated with the second zone to cause fluid communicated through the coiled tubing string or the jointed tubing to exit the string or the jointed tubing at the one jetting sub associated with the second zone.

2. The method of claim 1, wherein the act of treating the first zone comprises:

communicating treating fluid through an annular region that surrounds the coiled tubing string or the jointed tubing by introducing a treatment fluid downward through the annular region to the first zone.

3. The method of claim 1, further comprising:

at the conclusion of the treating of the first zone of the well, introducing a fluid containing a diversion agent through the coiled tubing or the jointed tubing to the first zone.

4. The method of claim 3, wherein the diversion agent comprises fiber.

5. The method of claim 3, wherein the diversion agent comprises degradable material.

6. The method of claim 1, wherein the first zone is located downhole from the second zone.

7. The method of claim 1, wherein a portion of the well comprises a lateral wellbore.

8. The method of claim 1, wherein the first zone is part of a wellbore and the second zone is part of the wellbore.

9. The method of claim 1, further comprising:

repeating the acts of treating and perforating for additional zones of the well.

10. The method of claim 1, further comprising:

removing the object after the completion of the perforating of the second zone to permit perforation of another zone with another one of the jetting subs.

11. The method of claim 10, wherein the object comprises a ball and the act of removing the object comprises dissolving the ball.

12. The method of claim 1, further comprising:

using the other jetting subs to sequentially perforate other zones of the well.

13. The method of claim 12, wherein the act of using the other jetting subs comprises:

deploying differently-sized objects in the coiled tubing string to sequentially activate said other jetting subs.

14. A system usable with a well, comprising:

a pump to communicate a treatment fluid into the well to treat a first zone of the well; and

a string comprising a plurality of perforating devices that comprise a plurality of jetting subs, the plurality of perforating devices spaced apart along the length of the string adapted to be activated in a sequence to perforate different zones without requiring relocation of the string and to perforate a second zone of the well while simultaneously allowing the passage of the treatment fluid to the first zone,

wherein each of the jetting subs is adapted to be activated to communicate fluid from the sub to perforate a surrounding region of the well in response to a differently-sized object blocking fluid communication downstream of the jetting sub.

15. The system of claim 14, wherein the string comprises a coiled tubing string.

16. The system of claim 14, wherein the pump communicates the treatment fluid through an annular region that surrounds the string.

17. The system of claim 14, further comprising:

a pump to communicate a diversion fluid through the string at the conclusion of the treatment of the first zone.

18. The system of claim 14, wherein the string is adapted to communicate a diversion fluid into the first zone at the conclusion of the treatment of the first zone.

19. The system of claim 14, wherein the string is adapted, to communicate fluid to perforate additional zones of the well during communication of treatment fluid to said additional zones of the well.