Methods of Enhancing the Fracture Conductivity of Multiple Interval Fractures in Subterranean Formations Propped with Cement Packs

• US 20140144634A1
• Filed: 11/28/2012
• Published: 05/29/2014
• Est. Priority Date: 11/28/2012
• Status: Abandoned Application

• Current Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Original Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Inventors: Nguyen, Philip D., Weaver, Jimmie D., East, Loyd E., Sierra, Leopoldo, Hunter, Timothy H., Sanders, Michael W., Bryant, Jason E., Izquierdo, Guillermo Antonio
• Application Number:
  US13/687,265
• Publication Number:
  US 20140144634A1
• Time in Patent Office: Days
• US Class Current: 166/281
• CPC Class Codes: E21B 43/261 Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation

Abstract

Methods of treating a wellbore in a subterranean formation having a top portion and a bottom portion, and a middle portion therebetween. The method includes providing a jetting fluid; providing a cement slurry; and providing a breakable gel fluid. Then introducing the jetting fluid into the bottom portion of the wellbore to create or enhance a bottom portion fracture; introducing the jetting fluid into the top portion of the wellbore to create or enhance a top portion fracture; introducing the cement slurry into the top portion fracture; introducing the cement slurry into the bottom portion fracture; and introducing the breakable gel fluid into the wellbore so as to prevent the expandable cementitious material from migrating out of the top portion fracture and bottom portion fracture. The expandable cementitious material is cured so as to form a cement pack, the breakable gel fluid is broken and removed from the subterranean formation.

Claims

1. A method comprising:

providing a wellbore in a subterranean formation having a top portion and a bottom portion, and a middle portion therebetween;

providing a jetting fluid comprising a base fluid and a cutting particulate;

providing a cement slurry comprising an expandable cementitious material, wherein the expandable cementitious material comprises an expandable agent selected from the group consisting of calcium oxide;

magnesium oxide;

any derivatives thereof; and

any combinations thereof;

providing a breakable gel fluid;

introducing the jetting fluid into the bottom portion of the wellbore in the subterranean formation at a pressure sufficient to create or enhance a bottom portion fracture therein;

introducing the jetting fluid into the top portion of the wellbore in the subterranean formation at a pressure sufficient to create or enhance a top portion fracture therein;

introducing the cement slurry into the top portion fracture;

introducing the cement slurry into the bottom portion fracture;

introducing the breakable gel fluid into the wellbore in the subterranean formation so as to prevent the expandable cementitious material from migrating out of the top portion fracture and the bottom portion fracture in the subterranean formation;

curing the expandable cementitious material so as to form a cement pack,

wherein the curing of the expandable cementitious material expands the expandable cementitious material such that at least one microfracture is created within the top portion fracture and the bottom portion fracture in the subterranean formation;

breaking the breakable gel fluid; and

removing the broken breakable gel fluid from the subterranean formation.

2. The method of claim 1 wherein the top portion fracture and the bottom portion fracture in the subterranean formation are created through a slot or a perforation in the subterranean formation.

3. The method of claim 1 wherein the wellbore in the subterranean formation is a lateral wellbore.

4. The method of claim 1 wherein the jetting fluid, cement slurry, and breakable gel fluid are introduced into the wellbore in the subterranean formation using a hydrojetting tool.

5. The method of claim 1 wherein a nano-particle is introduced into the wellbore in the subterranean formation after removing the broken breakable gel fluid from the wellbore in the subterranean formation.

6. The method of claim 1 further comprising acid-fracturizing the top portion fracture and the bottom portion fracture after the broken breakable gel fluid is removed.

7. (canceled)

8. A method comprising:

providing a wellbore in a subterranean formation having a top portion and a bottom portion, and a middle portion therebetween;

providing a jetting fluid comprising a base fluid and a cutting particulate;

providing a cement slurry comprising an expandable cementitious material, wherein the expandable cementitious material comprises an expandable agent selected from the group consisting of calcium oxide;

magnesium oxide;

any derivatives thereof; and

any combinations thereof;

providing a breakable gel fluid;

introducing the jetting fluid into the bottom portion of the wellbore in the subterranean formation at a pressure sufficient to create or enhance a bottom portion fracture therein;

introducing the jetting fluid into the middle portion of the wellbore in the subterranean formation at a pressure sufficient to create or enhance a middle portion fracture therein;

introducing the jetting fluid into the top portion of the wellbore in the subterranean formation at a pressure sufficient to create or enhance a top portion fracture therein;

introducing the cement slurry into the top portion fracture;

introducing the cement slurry into the middle portion fracture;

introducing the cement slurry into the bottom portion fracture;

introducing the breakable gel fluid into the wellbore in the subterranean formation so as to prevent the expandable cementitious material from migrating out of the top portion fracture and the bottom portion fracture in the subterranean formation;

curing the expandable cementitious material so as to form a cement pack,

wherein the curing of the expandable cementitious material expands the expandable cementitious material such that at least one microfracture is created within the top portion fracture, the middle portion fracture, and the bottom portion fracture in the subterranean formation;

breaking the breakable gel fluid; and

removing the broken breakable gel fluid from the subterranean formation.

9. The method of claim 8 wherein the top portion fracture, the middle portion fracture, and the bottom portion fracture in the subterranean formation are created through a slot or a perforation in the subterranean formation.

10. The method of claim 8 wherein the wellbore in the subterranean formation is a lateral wellbore.

11. The method of claim 8 wherein the jetting fluid, cement slurry, and breakable gel fluid are introduced into the wellbore in the subterranean formation using a hydrojetting tool.

12. The method of claim 8 wherein a nano-particle is introduced into the wellbore in the subterranean formation after removing the broken breakable gel fluid from the wellbore in the subterranean formation.

13. The method of claim 8 further comprising acid-fracturizing the top portion fracture and the bottom portion fracture after the broken breakable gel fluid is removed.

14. (canceled)

15. A method comprising:

providing a wellbore in a subterranean formation having a top portion and a bottom portion, and a middle portion therebetween;

providing a jetting fluid comprising a base fluid and a cutting particulate;

providing a cement slurry comprising an expandable cementitious material, wherein the expandable cementitious material comprises an expandable agent selected from the group consisting of calcium oxide;

magnesium oxide;

any derivatives thereof; and

any combinations thereof;

providing a breakable gel fluid;

introducing the jetting fluid into the bottom portion of the wellbore in the subterranean formation at a pressure sufficient to create or enhance a bottom portion fracture therein;

introducing the jetting fluid into the middle portion of the wellbore in the subterranean formation at a pressure sufficient to create or enhance a middle portion fracture therein;

introducing the jetting fluid into the top portion of the wellbore in the subterranean formation at a pressure sufficient to create or enhance a top portion fracture therein;

introducing the cement slurry into at least one of the top portion fracture, the middle fracture, and the bottom fracture;

introducing the breakable gel fluid into the wellbore in the subterranean formation so as to prevent the expandable cementitious material from migrating out of the top portion fracture and the bottom portion fracture in the subterranean formation;

curing the expandable cementitious material so as to form a cement pack,

wherein the curing of the expandable cementitious material expands the expandable cementitious material such that at least one microfracture is created within the top portion fracture, the middle portion fracture, and the bottom portion fracture in the subterranean formation;

breaking the breakable gel fluid; and

removing the broken breakable gel fluid from the subterranean formation.

16. The method of claim 15 wherein the top portion fracture, the middle portion fracture, and the bottom portion fracture in the subterranean formation are created through a slot or a perforation in the subterranean formation.

17. The method of claim 15 wherein the wellbore in the subterranean formation is a lateral wellbore.

18. The method of claim 15 wherein the jetting fluid, cement slurry, and breakable gel fluid are introduced into the wellbore in the subterranean formation using a hydrojetting tool.

19. The method of claim 15 wherein a nano-particle is introduced into the wellbore in the subterranean formation after removing the broken breakable gel fluid from the wellbore in the subterranean formation.

20. The method of claim 15 further comprising acid-fracturizing the top portion fracture and the bottom portion fracture after the broken breakable gel fluid is removed.