Enhanced oil recovery using treatment fluids comprising colloidal silica with a proppant

1. A method of increasing production from a hydrocarbon containing formation by adding a proppant to the formation, characterized in that a treatment fluid comprising colloidal silica nanoparticles is added to the formation before, during or after the time the proppant is added to the formation, wherein the treatment fluid comprising the colloidal silica nanoparticles is a crude oil recovery chemical solution comprising a silane compound and an aqueous silica sol having an average particle size of from about 3 nm to about 200 nm, wherein the aqueous silica sol comprises silica particles in which at least a part of the silane compound is bonded on the surface of at least a part of the silica particles in the sol, and wherein the silane compound comprises 3-glycidoxypropyltrimethoxysilane.

2. The method of claim 1 characterized in that the treatment fluid comprising the colloidal silica nanoparticles is added to the formation before the time the proppant is added to the formation.

3. The method of claim 1 characterized in that the treatment fluid comprising the colloidal silica nanoparticles is added to the formation during the time the proppant is added to the formation.

4. The method of claim 1 characterized in that the treatment fluid comprising the colloidal silica nanoparticles is added to the formation after the time the proppant is added to the formation.

5. The method of claim 1 characterized in that the treatment fluid comprising the colloidal silica nanoparticles is added to the formation before and during the time the proppant is added to the formation.

6. The method of claim 1 characterized in that the treatment fluid comprising the colloidal silica nanoparticles is added to the formation during and after the time the proppant is added to the formation.

7. The method of claim 1 characterized in that the treatment fluid comprising the colloidal silica nanoparticles is added to the formation before and after the time the proppant is added to the formation.

8. The method of claim 1 , wherein the aqueous silica sol is present in an amount of from about 0.1% by mass to about 20% by mass, based on the total mass of the crude oil recovery chemical solution, in terms of silica solid content.

9. The method of claim 1 , wherein the proppant is sand.

10. The method of claim 9 , wherein the sand is 20 mesh, 40 mesh, 70 mesh, or 100 mesh.

11. The method of claim 9 , wherein the sand is a combination of 100 mesh and 40 mesh, a combination of 70 mesh and 40 mesh, or a combination of 40 mesh and 20 mesh.

12. The method of claim 1 , wherein the proppant is coated with the treatment fluid comprising the colloidal silica nanoparticles.

13. The method of claim 1 , wherein the silane compound further comprises an organosilane selected from 3-(triethoxysilyl)propyl succinic anhydride, 3-(trimethoxysilyl)propyl methacrylate, hexamethyl disiloxane, hexamethyl disilazane, trimethoxy methyl silane, trimethoxy phenyl silane, vinyl trimethoxysilane, 3-(N,N-dimethylaminopropyl)-trimethoxysilane, 3-(diethylamino)propyl trimethoxysilane, trimethoxy(octadecyl)silane, isobutyl trimethoxysilane, hexyltrimethoxysilane, decyltrimethoxysilane, isooctyltrimethoxysilane, hexadecyltrimethoxysilane, propyltrimethoxysilane, and octyltriethoxysilane.

14. The method of claim 1 , wherein the silane compound comprises a polysiloxane oligomer formed from the 3-glycidoxypropyltrimethoxysilane and an organosilane selected from 3-(triethoxysilyl)propyl succinic anhydride, 3-(trimethoxysilyl)propyl methacrylate, hexamethyl disiloxane, hexamethyl disilazane, trimethoxy methyl silane, trimethoxy phenyl silane, vinyl trimethoxysilane, 3-(N,N-dimethylaminopropyl)-trimethoxysilane, 3-(diethylamino)propyl trimethoxysilane, trimethoxy(octadecyl)silane, isobutyl trimethoxysilane, hexyltrimethoxysilane, decyltrimethoxysilane, isooctyltrimethoxysilane, hexadecyltrimethoxysilane, propyltrimethoxysilane, and octyltriethoxysilane.