Fracturing Fluid Loss Control Agent

Abstract

A fluid loss control system for use in a well penetrating a subterranean formation includes a microgel for forming a monolayer on rock surfaces in fractures in the subterranean formation. A method for fluid loss control in a subterranean formation includes placing a fluid loss control solution in a wellbore penetrating the subterranean formation, wherein the fluid loss control solution comprises a microgel for forming a monolayer on rock surfaces in fractures in the subterranean formation.

1 . A fluid loss control system for use in a well penetrating a subterranean formation, comprising a microgel for forming at least a partial monolayer on rock surfaces in fractures in the subterranean formation. 
     
     
         2 . The fluid loss control system of  claim 1 , wherein the microgel is a copolymer of acrylamide and AMPS monomers. 
     
     
         3 . The fluid loss control system of  claim 1 , wherein a substantial portion of the microgel has particle sizes no larger than about 10 microns. 
     
     
         4 . The fluid loss control system of  claim 1 , further comprising a well treatment fluid. 
     
     
         5 . The fluid loss control system of  claim 1 , wherein the fractures are hydraulically created during a stimulation treatment. 
     
     
         6 . The fluid loss control system of  claim 4 , wherein the well treatment fluid is a fracturing fluid. 
     
     
         7 . The fluid loss control system of  claim 6 , wherein the fracturing fluid comprises a viscoelastic surfactant. 
     
     
         8 . A method for fluid loss control in a subterranean formation, comprising:
 placing a fluid loss control solution in a wellbore penetrating the subterranean formation, wherein the fluid loss control solution comprises a microgel for forming a monolayer on rock surfaces in fractures in the subterranean formation.   
     
     
         9 . The method of  claim 8 , wherein the microgel is a copolymer of acrylamide and AMPS monomers. 
     
     
         10 . The method of  claim 8 , wherein a substantial portion of the microgel has particle sizes no larger than about 10 microns. 
     
     
         11 . The method of  claim 8 , wherein the fluid loss control solution comprises the microgel in a well treatment fluid. 
     
     
         12 . The method of  claim 11 , wherein the well treatment fluid is a fracturing fluid. 
     
     
         13 . The method of  claim 12 , wherein the fracturing fluid comprises a viscoelastic surfactant. 
     
     
         14 . The method of  claim 8 , wherein a drilling fluid comprises the fluid loss control solution. 
     
     
         15 . The method of  claim 8 , wherein a cementing fluid comprises the fluid loss control solution. 
     
     
         16 . The method of  claim 8 , wherein an acidizing fluid comprises the fluid loss control solution. 
     
     
         17 . The method of  claim 8 , wherein an acid fracturing fluid comprises the fluid loss control solution.