Hydraulic fracturing composition, method for making and use of same

Patent metadata

Field	Value
Publication number	US-10138418-B2
Application number	US-201715725369-A
Country	US
Kind code	B2
Filing date	Oct 5, 2017
Priority date	May 7, 2013
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

A hydraulic fracturing composition includes: a superabsorbent polymer in an expanded state and configured to break in response to a breaking condition; a plurality of proppant particles disposed in the superabsorbent polymer prior to release of the plurality of proppant particles from the superabsorbent polymer in response to breaking the superabsorbent polymer; and a fluid to expand the superabsorbent polymer into the expanded state. The hydraulic fracturing composition can be made by contacting a superabsorbent polymer with a fluid to expand the superabsorbent polymer into an expanded state; and disposing a plurality of proppant particles in the superabsorbent polymer to make the hydraulic fracturing composition.

First claim

What is claimed is:

1. A hydraulic fracturing composition comprising:
a superabsorbent polymer in an expanded state and configured to break in response to contact with a breaker, the polymer having internal crosslinks derived from ethyleneglycol diacrylate, polyethyleneglycol diacrylate, trimethylopropane trimethacrylate, ethoxylated trimethylol triacrylate, ethoxylated pentaerythritol tetracrylate, or a combination comprising at least one of the foregoing but no intra-particle crosslinks; the superabsorbent polymer including a repeat unit derived from an acrylate, an acrylamide, a vinylpyrrolidone, a vinyl acetate, a 2-acrylamide-2-methylpropanesulfonic acid, an acrylic acid salt, or a combination thereof;
a plurality of proppant particles disposed in the superabsorbent polymer prior to release of the plurality of proppant particles from the superabsorbent polymer in response to breaking the superabsorbent polymer;
a fluid to expand the superabsorbent polymer into the expanded state; and
a breaker, the superabsorbent polymer and the breaker being selected such that the breaker reacts with the superabsorbent polymer to break a bond in a polymer chain of the super absorbent polymer, a bond in a crosslink of the superabsorbent polymer, a bond between the crosslink and the polymer chain, or a combination thereof.

2. The hydraulic fracturing composition of claim 1 , wherein the plurality of proppant particles comprises a ceramic, sand, a mineral, a nut shell, gravel, resinous particles, polymeric particles, or a combination thereof.

3. The hydraulic fracturing composition of claim 1 , wherein the breaker comprises an oxidizer which comprises a peroxide, a persulfate, a peracid, or a combination thereof.

4. The hydraulic fracturing composition of claim 3 , wherein the breaker is encapsulated in an encapsulating material to prevent the breaker from contacting the superabsorbent polymer, and the encapsulating material is configured to release the breaker.

5. The hydraulic fracturing composition of claim 1 , wherein the superabsorbent polymer in an expanded state has a viscosity of from 1 centipoise to 300 cP, as measured by Ofite M900 rheometer for less than 100 cP viscosity or Grace M5500 rheometer for more than 100 cP viscosity at a temperature of 180° F.

6. The hydraulic fracturing composition of claim 1 , wherein the superabsorbent polymer is polyacrylamide having crosslinks derived from polyethylene glycol diacrylate.

7. The hydraulic fracturing composition of claim 1 , wherein the superabsorbent polymer is a copolymer derived from an acrylic acid and an salt thereof.

8. The hydraulic fracturing composition of claim 7 , wherein the superabsorbent polymer comprises internal crosslinks derived from polyethylene glycol diacrylate.

9. The hydraulic fracturing composition of claim 1 , wherein the fluid to expand the superabsorbent polymer comprises water, brine, mineral acid, organic acid, or a combination comprising at least one of the foregoing.

10. The hydraulic fracturing composition of claim 1 , wherein the fluid to expand the superabsorbent polymer comprises a salt, which is NaCl, KCl, NaBr, MgCl 2 , CaCl 2 , CaBr 2 , ZnBr 2 , NH 4 Cl, sodium formate, cesium formate, or a combination comprising at least one of the foregoing, the salt being present in an amount of about 1 wt. % to about 25 wt. % based on the weight of the fluid.

11. The hydraulic fracturing composition of claim 1 , wherein the fluid to expand the superabsorbent polymer comprises a hydrochloric acid, nitric acid, phosphoric acid, sulfuric acid, boric acid, hydrofluoric acid, hydrobromic acid, perchloric acid, or a combination comprising at least one of the foregoing.

12. The hydraulic fracturing composition of claim 1 , further comprising an additive which comprises a surfactant, a lubricant, a non-emulsifier, a clay stabilizer, a biocide, or a combination thereof.

13. The hydraulic fracturing composition of claim 12 , wherein the additive is present in an amount from 0.005 vol % to 1 vol %, based on the total volume of the composition.

14. The hydraulic fracturing composition of claim 1 , wherein the superabsorbent polymer is present in a mass concentration from 1 ppt to 200 ppt, based on the total volume of the composition.

15. The hydraulic fracturing composition of claim 1 , wherein the plurality of proppant particles is present in a mass concentration from 0.1 lb/gal to 12 lb/gal, based on the total volume of the composition.

16. The hydraulic fracturing composition of claim 1 , wherein the breaker is present in a mass concentration from greater than 0 ppt to 20 ppt, based on the total volume of the composition.

17. The hydraulic fracturing composition of claim 1 , wherein a time the plurality of proppant particles are disposed in the superabsorbent polymer prior to release from the superabsorbent polymer is greater than or equal to 20 min at a temperature greater than or equal to 150° F.

Assignees

• Zhou Jia
• Sun Hong
• Qu Qi
• Guerin Michael
• Baker Hughes A Ge Co Llc

Inventors

• Zhou Jia
• Sun Hong
• Qu Qi
• Guerin Michael

Classifications

• C09K8/685

  containing cross-linking agents · CPC title

• C09K8/805 Primary

  Coated proppants · CPC title