Viscosification and foaming of polyacrylamides

Abstract

Embodiments of the invention relate to a method for treating a subterranean formation, comprising forming a fluid comprising polyacrylamide and a biopolymer and introducing the fluid to a subterranean formation wherein the polyacrylamide and biopolymer are selected to form the fluid with a longer foam half life and a higher viscosity than if only one polymer were selected. Embodiments of the invention relate to a method for treating a subterranean formation, comprising forming a fluid comprising polyacrylamide and a biopolymer and introducing the fluid to a subterranean formation wherein the polyacrylamide does not alter biopolymer crosslinking.

1 . A method for treating a subterranean formation, comprising:
 forming a fluid comprising polyacrylamide and a biopolymer; and   introducing the fluid to a subterranean formation;   wherein the polyacrylamide and biopolymer are selected to form the fluid with a longer foam half life and a higher viscosity than if only one polymer were selected.   
     
     
         2 . The method of  claim 1 , wherein the polyacrylamide comprises polyacrylamide, grafted polyacrylamide, modified polyacrylamide, polyacrylamide hybrids, hydrophobic polyacrylamide, hydrophilic polyacrylamide, acrylamide sodium acrylate copolymer, and/or any combination thereof. 
     
     
         3 . The method of  claim 1 , wherein the polyacrylamide is selected for its molecular weight. 
     
     
         4 . The method of  claim 3 , wherein the polyacrylamide has a molecular weight of about 5 to about 15 MM. 
     
     
         5 . The method of  claim 3 , wherein the polyacrylamide has a molecular weight of about 200 to about 500K. 
     
     
         6 . The method of  claim 1 , wherein the biopolymer is diutan. 
     
     
         7 . The method of  claim 1 , wherein the biopolymer is xanthan. 
     
     
         8 . The method of  claim 1 , wherein the biopolymer is guar. 
     
     
         9 . The method of  claim 1 , wherein the biopolymer crosslinking is not altered by the presence of the polyacrylamide. 
     
     
         10 . A method for treating a subterranean formation, comprising:
 forming a fluid comprising polyacrylamide and a biopolymer; and   introducing the fluid to a subterranean formation;   wherein the polyacrylamide does not alter biopolymer crosslinking.   
     
     
         11 . The method of  claim 10 , wherein the polyacrylamide comprises polyacrylamide, grafted polyacrylamide, modified polyacrylamide, polyacrylamide hybrids, hydrophobic polyacrylamide, hydrophilic polyacrylamide, acrylamide sodium acrylate copolymer, and/or any combination thereof. 
     
     
         12 . The method of  claim 10 , wherein the biopolymer is diutan. 
     
     
         13 . The method of  claim 10 , wherein the biopolymer is xanthan. 
     
     
         14 . The method of  claim 10 , wherein the biopolymer is guar. 
     
     
         15 . The method of  claim 10 , wherein the polyacrylamide is selected for its molecular weight.