Compositions and methods for controlling the release of chemicals placed on particulates

Abstract

The present invention relates to methods and compositions for creating and using particulate materials having treating agents absorbed thereon and coated with a degradable coating material. One embodiment of a method of the present invention provides a method treating to a subterranean formation comprising placing a coated, treated particulate into a subterranean formation wherein the coated, treated particulate comprises a particulate material having a treating agent placed thereon and a substantially complete layer of a degradable coating material coated placed thereon over the treating agent.

1 . (Cancelled)  
     
     
         2 . The method of  claim 36  wherein the particulate material has at least one recessed or depressed area along a surface of the particulate material.  
     
     
         3 . The method of  claim 36  wherein the treating agent comprises a gel breaker, an acid, an oxidizer, an enzyme, a hydrolyzable ester, a scale inhibitor, a biocide, a corrosion inhibitor, a paraffin inhibitor, a cement slurry set accelerator, a cement slurry set retarder, a cement slurry dispersant, a cement slurry fluid loss control additive, a cement slurry thixotropic additive, a cement slurry suspending agent, or a combination thereof.  
     
     
         4 . The method of  claim 36  wherein the particulate material is coated with the treating agent in an amount of from about 0.1% to about 50% by weight of the particulate material.  
     
     
         5 . The method of  claim 36  wherein the degradable coating material comprises a substantially water insoluble ester; an ortho ester; a poly(orthoester); an aliphatic polyester; a lactide; a poly(lactide); a glycolide; a poly(glycolide); a poly(ε-caprolactone); a poly(hydroxybutyrate); a substantially water insoluble anhydride; a poly(anhydride); an aliphatic carbonate; a polycarbonate; a poly(amino acid); a polyphosphazene; or a combination thereof.  
     
     
         6 . The method of  claim 36  wherein the degradable coating material comprises a solvent.  
     
     
         7 . The method of  claim 6  wherein the solvent comprises acetone, propylene carbonate, dipropylene glycol methyl ether, methylene chloride, isopropyl alcohol, or a combination thereof.  
     
     
         8 . (Cancelled)  
     
     
         9 . The method of  claim 37  wherein the particulate material has at least one recessed or depressed area along a surface of the particulate material.  
     
     
         10 . The method of  claim 37  wherein the treating agent comprises a gel breaker, an acid, an oxidizer, an enzyme, a hydrolyzable ester, a scale inhibitor, a biocide, a corrosion inhibitor, a paraffin inhibitor, a cement slurry set accelerator, a cement slurry set retarder, a cement slurry dispersant, a cement slurry fluid loss control additive, a cement slurry thixotropic additive, a cement slurry suspending agent, or a combination thereof.  
     
     
         11 . The method of  claim 37  wherein the particulate material is coated with the treating agent in an amount of from about 0.1% to about 50% by weight of the particulate material.  
     
     
         12 . The method of  claim 37  wherein the degradable coating material comprises a substantially water insoluble ester; an ortho ester; a poly(orthoester); an aliphatic polyester; a lactide, a poly(lactide); a glycolide; a poly(glycolide); a poly(ε-caprolactone); a poly(hydroxybutyrate); a substantially water insoluble anhydride; a poly(anhydride); an aliphatic carbonate; a polycarbonate; a poly(amino acid); a polyphosphazene; or a combination thereof.  
     
     
         13 . The method of  claim 37  wherein the degradable coating material comprises a solvent.  
     
     
         14 . The method of  claim 13  wherein the solvent comprises acetone, propylene carbonate, dipropylene glycol methyl ether, methylene chloride, isopropyl alcohol, or a combination thereof.  
     
     
         15 . (Cancelled)  
     
     
         16 . The method of  claim 38  wherein the particulate material has at least one recessed or depressed area alone a surface of the particulate material.  
     
     
         17 . The method of  claim 38  wherein the treating agent comprises a gel breaker, an acid, an oxidizer, an enzyme, a hydrolyzable ester, a scale inhibitor, a biocide, a corrosion inhibitor, a paraffin inhibitor, a cement slurry set accelerator, a cement slurry set retarder, a cement slurry dispersant, a cement slurry fluid loss control additive, a cement slurry thixotropic additive, a cement slurry suspending agent, or a combination thereof.  
     
     
         18 . The method of  claim 38  wherein the particulate material is coated with the treating agent in an amount of from about 0.1% to about 50% by weight of the particulate material.  
     
     
         19 . The method of  claim 38  wherein the degradable coating material comprises a substantially water insoluble ester; an ortho ester; a poly(orthoester); an aliphatic polyester; a lactide; a poly(lactide); a glycolide; a poly(glycolide); a poly(ε-caprolactone); a poly(hydroxybutyrate); a substantially water insoluble anhydride; a poly(anhydride); an aliphatic carbonate; a polycarbonate; a poly(amino acid); a polyphosphazene; or a combination thereof.  
     
     
         20 . The method of  claim 38  wherein the degradable coating material comprises a solvent.  
     
     
         21 . The method of  claim 20  wherein the solvent comprises acetone, propylene carbonate, dipropylene glycol methyl ether, methylene chloride, isopropyl alcohol, or a combination thereof.  
     
     
         22 . (Cancelled)  
     
     
         23 . The coated, treated particulate material of  claim 39  wherein the particulate material has at least one recessed or depressed area along a surface of the particulate material.  
     
     
         24 . The coated, treated particulate material of  claim 39  wherein the treating agent comprises a gel breaker, an acid, an oxidizer, an enzyme, a hydrolyzable ester, a scale inhibitor, a biocide, a corrosion inhibitor, a paraffin inhibitor, a cement slurry set accelerator, a cement slurry set retarder, a cement slurry dispersant, a cement slurry fluid loss control additive, a cement slurry thixotropic additive, a cement slurry suspending agent, or a combination thereof.  
     
     
         25 . The coated, treated particulate material of  claim 39  wherein the particulate material is coated with the treating agent in an amount of from about 0.1% to about 50% by weight of the particulate material.  
     
     
         26 . The coated, treated particulate material of  claim 39  wherein the degradable coating material comprises a substantially water insoluble ester; an ortho ester; a poly(orthoester); an aliphatic polyester; a lactide; a poly(lactide); a glycolide; a poly(glycolide); a poly(ε-caprolactone); a poly(hydroxybutyrate); a substantially water insoluble anhydride; a poly(anhydride); an aliphatic carbonate; a polycarbonate; a poly(amino acid); a polyphosphazene; or a combination thereof.  
     
     
         27 . The coated, treated particulate material of  claim 39  wherein the degradable coating material comprises a solvent.  
     
     
         28 . The coated, treated particulate material of  claim 27  wherein the solvent comprises acetone, propylene carbonate, dipropylene glycol methyl ether, methylene chloride, isopropyl alcohol, or a combination thereof.  
     
     
         29 . A method of preparing a coated, treated particulate material, comprising: 
 adsorbing a treating agent onto a particulate material; and    coating the particulate material with a coating material comprising a degradable material so that the coating material at least partially encapsulates the particulate material.    
     
     
         30 . The method of  claim 29  wherein the particulate material has at least one recessed or depressed area alone a surface of the particulate material.  
     
     
         31 . The method of  claim 29  wherein the treating agent comprises a gel breaker, an acid, an oxidizer, an enzyme, a hydrolyzable ester, a scale inhibitor, a biocide, a corrosion inhibitor, a paraffin inhibitor, a cement slurry set accelerator, a cement slurry set retarder, a cement slurry dispersant, a cement slurry fluid loss control additive, a cement slurry thixotropic additive, a cement slurry suspending agent, or a combination thereof.  
     
     
         32 . The method of  claim 29  wherein the particulate material is coated with the treating agent in an amount of from about 0.1% to about 50% by weight of the particulate material.  
     
     
         33 . The method of  claim 29  wherein the degradable material comprises a substantially water insoluble ester; an ortho ester; a poly(orthoester); an aliphatic polyester; a lactide; a poly(lactide); a glycolide; a poly(glycolide); a poly(ε-caprolactone); a poly(hydroxybutyrate); a substantially water insoluble anhydride; a poly(anhydride); an aliphatic carbonate; a polycarbonate; a poly(amino acid); a polyphosphazene; or a combination thereof.  
     
     
         34 . The method of  claim 29  wherein the degradable material comprises a solvent.  
     
     
         35 . The method of  claim 34  wherein the solvent comprises acetone, propylene carbonate, dipropylene glycol methyl ether, methylene chloride, isopropyl alcohol, or a combination thereof.  
     
     
         36 . A method of treating a subterranean formation comprising: 
 providing a coated, treated particulate material comprising a treating agent adsorbed on a particulate material and an outer coating that comprises a degradable coating material, the outer coating at least partially encapsulating the particulate material; and    introducing the coated, treated particulate material into a subterranean formation.    
     
     
         37 . A method of forming a gravel pack in a well bore comprising: 
 providing a gravel composition comprising a servicing fluid and a coated, treated particulate material, the coated, treated particulate material comprising a treating agent adsorbed on a particulate material and an outer coating that comprises a degradable coating material, the outer coating at least partially encapsulating the particulate material; and    depositing the coated, treated particulate material into a well bore.    
     
     
         38 . A method of creating a proppant pack in a fracture comprising: 
 providing a proppant composition comprising a servicing fluid and a coated, treated particulate material, wherein the coated, treated particulate material comprises a treating agent adsorbed on a particulate material and an outer coating that comprises a degradable coating material, the outer coating at least partially encapsulating the particulate material; and    depositing the coated, treated particulate material into a fracture in a subterranean formation.    
     
     
         39 . A coated, treated particulate material comprising a treating agent adsorbed on a particulate material and an outer coating that comprises a degradable coating material, the outer coating at least partially encapsulating the particulate material.