Injection distribution device

Abstract

Embodiments of the present disclosure generally relate to apparatus and methods for controlling injection profile. One embodiment provides an injection distribution device. The injection distribution device includes a shield portion and a baffle portion. The baffle portion comprises a first baffle having a plurality of first openings formed therethrough, and a second baffle having a plurality of second openings formed therethrough. At least a portion of the first baffle overlaps with the second.

1 . An injection distribution device, comprising:
 a first baffle having a plurality of first openings; and   a second baffle having a plurality of second openings, wherein at least a portion of the second baffle overlap with the first baffle, and the plurality of second openings are arranged so that flow resistance of through the second baffle varies along a length of the second baffle.   
     
     
         2 . The injection distribution device of  claim 1 , wherein the flow resistance through the second baffle increases from a first end to a second along the length of the second baffle. 
     
     
         3 . The injection distribution device of  claim 1 , wherein the flow resistance through the second baffle increases from a first end to a center point and decreases from the center point to a second end. 
     
     
         4 . The injection distribution device of  claim 1 , wherein the flow resistance through the second baffle decreases from a first end to a center point and increases from the center point to a second end. 
     
     
         5 . The injection distribution device of  claim 2 , wherein the plurality of first openings are arranged in a manner that a flow resistance through the first baffle decreases from the first end to the second end along the length of the first baffle. 
     
     
         6 . The injection distribution device of  claim 2 , wherein the plurality of first openings are evenly distributed along the first baffle. 
     
     
         7 . The injection distribution device of  claim 1 , further comprising a shield portion connected to the first and second baffles, wherein the shield portion comprises:
 a base pipe including an inject port;   a screen member surrounding the base pipe.   
     
     
         8 . The injection distribution device of  claim 1 , wherein the first baffle is disposed concentrically relative to the second baffle. 
     
     
         9 . An injection assembly, comprising:
 a base pipe including an inject port;   a screen member surrounding the base pipe; and   an injection distribution device disposed between the base pipe and the screen member, wherein the injection distribution device comprises:
 a first baffle having a plurality of first openings formed therethrough; 
   and
 a second baffle having a plurality of second openings formed therethrough, wherein at least a portion of the first baffle overlaps with the second baffle 
   
     
     
         10 . The injection assembly of  claim 9 , wherein the first baffle has a first end disposed adjacent to the port and a second end disposed away from the port, the plurality of first openings are arranged so that a flow resistance through the first baffle decreases from the first end to the second end. 
     
     
         11 . The injection assembly of  claim 10 , wherein the second baffle has a first end disposed adjacent to the port and a second end disposed away from the port, the plurality of second openings are arranged so that a flow resistance through the second baffle increases from the first end to the second end. 
     
     
         12 . The injection assembly of  claim 10 , wherein the plurality of second openings are of the same size and evenly distributed along the second baffle. 
     
     
         13 . The injection assembly of  claim 9 , wherein the baffle portion has a length between about 15 ft to about 30 ft. 
     
     
         14 . The injection assembly of  claim 10 , wherein the injection distribution device further comprises a shield portion disposed around the port in the base pipe. 
     
     
         15 . The injection assembly of  claim 9 , further comprising a sliding sleeve disposed inside the base pipe to selectively open and close the inject port. 
     
     
         16 . A method for supplying a fluid into a formation zone, comprising:
 injecting the fluid from an interior of a base pipe to an exterior of the base pipe through an inject port formed through the base pipe;   directing the flow of fluid from the port along a baffle portion disposed around the base pipe, wherein the baffle portion includes a plurality of openings configured to vary the flow resistance through the baffle portion along a length of the baffle portion;   allowing the fluid to selectively flow through the plurality of openings in the baffle portion; and   flowing the fluid from the baffle through a screen mechanism to the formation zone.   
     
     
         17 . The method of  claim 16 , further comprising:
 shielding a screen mechanism surrounding the base pipe with a shield portion of an injection distribution device.   
     
     
         18 . The method of  claim 17 , further comprising:
 opening the inject port formed through the base pipe using a sliding sleeve disposed in the base pipe.   
     
     
         19 . The method of  claim 16 , wherein the baffle portion comprises a first baffle having a plurality of first openings formed therethrough, and the first baffle has a first end disposed close to the shield portion and a second end disposed away from the shield portion, the plurality of first openings are arranged so that a flow resistance through the first baffle decreases from the first end to the second end,
 wherein flowing the fluid through the baffle portion comprises directing the fluid in a distribution annulus between the first baffle and the base pipe from the first end of the first baffle towards the second end of the first baffle.   
     
     
         20 . The method of  claim 19 , wherein the baffle portion further comprises a second baffle having a plurality of second openings formed therethrough, and the second baffle is disposed concentrically outside the first baffle, the second baffle has a first end disposed close to the shield portion and a second end disposed away from the shield portion, the plurality of second openings are arranged so that a flow resistance through the second baffle increases from the first end to the second end,
 wherein flowing the fluid through the baffle portion comprises directing the fluid in a second distribution annulus between the second baffle and the first baffle from the second end of the second baffle towards the first end of the second baffle.