Fluid diversion composition in well stimulation
Described are methods and compositions for treating a subterranean formation. The method comprising introducing into the subterranean formation via a well-bore a diverter composition, the diverter composition comprising a combination of at least one deformable particle and at least one non-deformable particle; and allowing the diverter composition to block the flow of at least a portion of a treatment fluid from a first location within the well-bore to a second location.
1. A diverter composition comprising:
a combination of deformable particles and non-deformable particles, wherein the deformable particles and the non-deformable particles are degradable,
wherein the deformable particles consist of deformable polymer selected from
(i) crosslinked copolymers of acrylamide, acrylate, and vinylformamide monomers,
(ii) starch grafted with acrylonitrile and acrylate monomers,
(iii) crosslinked polymers of two or more of allylsulfonates, 2-acrylamido-2-methyl-1-propanesulfonic acid, 3-allyloxy- 2 -hydroxy-1-propane-sulfonic acid, diallyl dimethylammonium salts, benzyl diallylmethylammonium salts, methacrylamidopropyltrimethylammonium salts, acrylamidopropyltrimethylammonium salts, and
(iv) any combination thereof, and
wherein the non-deformable particles consist of a material selected from polyesters, polyamides, polyethers, polycarbonates, polyurethanes, peptides, polypeptides, urea-formaldehyde copolymers, poly(lactic acid), polyethylene terephthalate, and combinations thereof.
2. The diverter composition of claim 1 , wherein the deformable particles are present from about 1 wt % to about 99 wt % of the diverter composition.
3. The diverter composition of claim 1 , wherein the deformable particles are swellable particles.
4. The diverter composition of claim 1 , wherein the deformable particles have a volume average particle size from about 0.05 microns to about 100,000 microns.
5. The diverter composition of claim 1 , wherein the non-deformable particles consist of poly(lactic acid) or polyethylene terephthalate.
6. The diverter composition of claim 1 , wherein the non-deformable particles are present from about 1 wt % to about 99 wt % of the diverter composition.
7. The diverter composition of claim 1 , wherein the non-deformable particles have a volume average particle size range from about 0.05 mm to 65 mm.
8. The diverter composition of claim 1 , wherein the non-deformable particles consist of poly(lactic acid).
9. The diverter composition of claim 1 , wherein the diverter composition is present in a first treatment fluid at a concentration of 1,000 to 200,000 ppm.
10. The diverter composition of claim 1 , wherein the diverter composition withstands a pressure of 10 psi to 20,000 psi.
11. The diverter composition of claim 1 , wherein the composition is provided as a dry blend.
12. The diverter composition of claim 1 , further comprising a carrier fluid.
13. The diverter composition of claim 1 , the deformable particles consisting of a crosslinked copolymer of acrylamide, acrylic acid, and N-vinyl formamide.
14. The diverter composition of claim 13 , wherein the copolymer of acrylamide, acrylic acid, and N-vinylformamide is crosslinked with a mixture of tetraethylene glycol diacrylate and methylene bisacrylamide.
15. The diverter composition of claim 1 , wherein the deformable particles consist of a cmsslinked copolymer of acrylamide, acrylic acid, and N-vinyl formamide.
16. The diverter composition of claim 1 , wherein the non-deformable particles consist of poly(lactic acid).
17. The diverter composition of claim 1 , wherein the deformable particles are present in the diverter composition from 5 wt % to about 75 wt % of the diverter composition, and wherein the non-deformable particles are present in the diverter composition at from about 20 wt % to 50 wt % of the diverter composition.
18. The diverter composition of claim 1 , wherein the non-deformable particles consist of poly(L-lactic acid) or poly(D-lactic acid).
19. The diverter composition of claim 1 , wherein the deformable particles consist of starch grafted with acrylonitrile and acrylate monomers.