Infused and coated proppant containing chemical treatment agents and methods of using same

Patent metadata

Field	Value
Publication number	US-11124697-B2
Application number	US-201815960395-A
Country	US
Kind code	B2
Filing date	Apr 23, 2018
Priority date	Sep 17, 2014
Publication date	Sep 21, 2021
Grant date	Sep 21, 2021

Abstract

Proppant compositions and methods for using same are disclosed herein. In particular, a proppant composition for use in hydraulic fracturing is disclosed herein. The proppant composition can contain a plurality of particulates and at least one particulate of the plurality of particulates containing a chemical treatment agent. The at least one particulate having a long term permeability measured in accordance with ISO 13503-5 at 7,500 psi of at least about 10 D. The at least one chemical treatment agent can separate from the at least one particulate when located inside a fracture of a subterranean formation after a period of time.

First claim

What is claimed is:

1. A proppant composition, the composition comprising:
a proppant particulate;
a hydrocarbon-soluble chemical treatment agent;
a semi-permeable substantially non-degradable coating disposed onto the proppant particulate and surrounding the hydrocarbon-soluble chemical treatment agent, wherein the semi-permeable substantially non-degradable coating comprises an epoxy resin or a phenol-formaldehyde resin having a molar ratio of formaldehyde to phenol of about 1:1 to about 2.4:1;
a degradable shell encapsulating at least a portion of the semi-permeable substantially non-degradable coating and the hydrocarbon-soluble chemical treatment agent, wherein the degradable shell comprises one or more water-soluble polymers; and
wherein the hydrocarbon-soluble chemical treatment agent is configured to separate from the proppant particulate and to elute through the semi-permeable substantially non-degradable coating upon degradation of the degradable shell.

2. The composition of claim 1 , wherein the proppant particulate has an internal interconnected porosity of about 5% to about 75% and wherein at least a portion of the hydrocarbon-soluble chemical treatment agent is disposed in the internal interconnected porosity of the proppant particulate.

3. The composition of claim 1 , wherein the hydrocarbon-soluble chemical treatment agent comprises a paraffin inhibitor.

4. The composition of claim 3 , wherein the hydrocarbon-soluble chemical treatment agent elutes from the proppant composition at a rate of less than 1 ppm/(gram*day) for at least about 2 hours after contacting a subterranean formation and at a rate of at least about 0.1 ppm/(gram*day) for at least 2 weeks after contacting an aqueous phase solution and/or a hydrocarbon phase solution in the subterranean formation.

5. The composition of claim 1 , wherein the semi-permeable substantially non-degradable coating is a phenol-formaldehyde resin having a molar ratio of formaldehyde to phenol of about 1:1 to about 2.4:1.

6. The composition of claim 1 , wherein the hydrocarbon-soluble chemical treatment agent is mixed with the semi-permeable substantially non-degradable coating.

7. A proppant composition, the composition comprising:
a proppant particulate;
an asphaltene inhibitor;
a semi-permeable substantially non-degradable coating disposed onto the proppant particulate and surrounding the asphaltene inhibitor, wherein the semi-permeable substantially non-degradable coating comprises an epoxy resin or a phenol-formaldehyde resin having a molar ratio of formaldehyde to phenol of about 1:1 to about 2.4:1;
a degradable shell encapsulating at least a portion of the semi-permeable substantially non-degradable coating, wherein the degradable shell comprises one or more water-soluble polymers; and
wherein the asphaltene inhibitor is configured to separate from the proppant particulate and to elute through the semi-permeable substantially non-degradable coating upon degradation of the degradable shell.

8. The composition of claim 7 , wherein the proppant particulate has an internal interconnected porosity of about 5% to about 75% and wherein at least a portion of the asphaltene inhibitor is disposed in the internal interconnected porosity of the proppant particulate.

9. The composition of claim 7 , wherein the proppant composition further comprises a paraffin inhibitor.

10. The composition of claim 7 , wherein the asphaltene inhibitor comprises fatty esters of acrylic acid polymers.

11. The composition of claim 7 , wherein the semi-permeable substantially non-degradable coating is a phenol-formaldehyde resin having a molar ratio of formaldehyde to phenol of about 1:1 to about 2.4:1.

12. The composition of claim 7 , wherein the asphaltene inhibitor is mixed with the semi-permeable substantially non-degradable coating.

13. A proppant composition, the composition comprising:
a proppant particulate;
a paraffin inhibitor;
a semi-permeable substantially non-degradable coating disposed onto the proppant particulate and surrounding the paraffin inhibitor, wherein the semi-permeable substantially non-degradable coating comprises an epoxy resin or a phenol-formaldehyde resin having a molar ratio of formaldehyde to phenol of about 1:1 to about 2.4:1;
a degradable shell encapsulating at least a portion of the semi-permeable substantially non-degradable coating and the paraffin inhibitor, wherein the degradable shell comprises one or more water-soluble polymers; and
wherein the paraffin inhibitor is configured to separate from the proppant particulate and to elute through the semi-permeable substantially non-degradable coating upon degradation of the degradable shell.

14. The composition of claim 13 , wherein the proppant particulate has an internal interconnected porosity of about 5% to about 75% and wherein at least a portion of the paraffin inhibitor is disposed in the internal interconnected porosity of the proppant particulate.

15. The composition of claim 13 , wherein the proppant composition further comprises an asphaltene inhibitor.

16. The composition of claim 13 , wherein the paraffin inhibitor comprises ethylene/vinyl acetate copolymers, acrylates, polyacrylate esters, methacrylate esters of fatty alcohols, or olefin/maleic esters or any combination thereof.

17. The composition of claim 7 , wherein the semi-permeable substantially non-degradable coating is a phenol-formaldehyde resin having a molar ratio of formaldehyde to phenol of about 1:1 to about 2.4:1 and wherein the paraffin inhibitor is mixed with the semi-permeable substantially non-degradable coating.

18. The composition of claim 1 , wherein the proppant particulate is a porous ceramic proppant particulate.

19. The composition of claim 1 , wherein the proppant composition further comprises an asphaltene inhibitor.

Assignees

• Carbo Ceramics Inc

Inventors

• Duenckel Robert
• Conner Mark
• Cannan Chad
• Roper Todd
• Leasure Joshua
• Lieng Thu
• Cady Daniel
• Read Peter A

Classifications

• C09K8/605

  containing biocides · CPC title

• C09K2208/12

  Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating · CPC title

• C09K8/64

  Oil-based compositions · CPC title

• C09K2208/26

  Gel breakers other than bacteria or enzymes · CPC title

• C09K8/528

  inorganic depositions, e.g. sulfates or carbonates · CPC title