Wellbore having opposing action valvular conduits

Abstract

A wellbore (10) characterized by: a borehole (12) traversing at least two zones; a string (16) disposed in the borehole (12) and traversing the at least two zones; a first valvular conduit (24) disposed in the string (16); a second valvular conduit (26) disposed in the string (16) to communicate with a different one of the at least two zones, the different one of the at least two zones being the other of the charge reservoir (18) and the target reservoir (20), the second valvular conduit (26) being configured to present a lower pressure drop for fluids flowing into the borehole (12) than out of the borehole (12).

1 . A wellbore comprising:
 a borehole traversing at least two zones;   a string disposed in the borehole and traversing the at least two zones;   a first valvular conduit disposed in the string to communicate with one of the at least two zones, the one of the at least two zones being one of at least a charge reservoir and a target reservoir, the first valvular conduit being configured to present a lower pressure drop for fluids flowing out of the borehole than into the borehole;   a second valvular conduit disposed in the string to communicate with a different one of the at least two zones, the different one of the at least two zones being the other of the charge reservoir and the target reservoir, the second valvular conduit being configured to present a lower pressure drop for fluids flowing into the borehole than out of the borehole.   
     
     
         2 . The wellbore as claimed in  claim 1  wherein the first valvular conduit is disposed to communicate between the borehole and the charge reservoir. 
     
     
         3 . The wellbore as claimed in  claim 1  wherein the second valvular conduit is disposed to communicate between the borehole and the target reservoir. 
     
     
         4 . A method for producing fluid from a wellbore comprising
 pressuring up on the wellbore;   conveying fluid through a first valvular conduit to pressurize a charge reservoir of the wellbore; and   producing fluid through a second valvular conduit.   
     
     
         5 . The method as claimed in  claim 4  wherein the producing is from a different reservoir. 
     
     
         6 . The method as claimed in  claim 5  wherein the different reservoir is a target reservoir. 
     
     
         7 . The method as claimed in  claim 4  further comprising:
 again pressuring up on the wellbore; 
 conveying fluid through the first valvular conduit to pressurize a charge reservoir; and 
 producing fluid through the second valvular conduit. 
 
     
     
         8 . The method as claimed in  claim 4  wherein the charge reservoir is a water reservoir. 
     
     
         9 . The method as claimed in  claim 4  wherein the charge reservoir is a gas reservoir. 
     
     
         10 . The method as claimed in  claim 4  wherein the target reservoir is a hydrocarbon reservoir.