Salting out inhibitors for use in treatment fluids

Patent metadata

Field	Value
Publication number	US-11384624-B2
Application number	US-201816972945-A
Country	US
Kind code	B2
Filing date	Jul 18, 2018
Priority date	Jul 18, 2018
Publication date	Jul 12, 2022
Grant date	Jul 12, 2022

Abstract

Methods and system for using salting out inhibitors in subterranean formations are provided. In some embodiments, the methods comprise introducing a treatment fluid comprising an aqueous base fluid, a salting out inhibitor, a gelling agent, and one or more salts into at least a portion of a subterranean formation, wherein the salting out inhibitor is selected from the group consisting of: an oligomer comprising one or more quaternary ammonium cations, a polymer comprising one or more quaternary ammonium cations, a source of one or more phosphate anions, and any combination thereof.

First claim

What is claimed is:

1. A method comprising:
introducing a treatment fluid comprising an aqueous base fluid, a salting out inhibitor, a gelling agent, and one or more salts into at least a portion of a subterranean formation, wherein the salting out inhibitor is selected from the group consisting of: an oligomer comprising one or more quaternary ammonium cations, a polymer comprising one or more quaternary ammonium cations, a source of one or more phosphate anions, and any combination thereof, and wherein the gelling agent is a polysaccharide gelling agent.

2. The method of claim 1 , wherein the treatment fluid comprises a gravel material.

3. The method of claim 2 , further comprising allowing the gravel material to form at least a portion of a gravel pack in at least the portion of the subterranean formation.

4. The method of claim 1 , wherein the treatment fluid is introduced at a pressure sufficient to create or enhance one or more fractures within the subterranean formation.

5. The method of claim 1 , wherein the polysaccharide gelling agent is selected from group consisting of: xanthan, scleroglucan, diutan, succinoglycan, guar, hydroxyethyl cellulose, a derivative of the foregoing, and any combination thereof.

6. The method of claim 1 , wherein the one or more salts are present in the treatment fluid in an amount of from about 8.5 lb/gal to about 14.5 lb/gal.

7. The method of claim 1 , wherein the one or more salts are selected from the group consisting of: an alkali metal halide salt, an alkaline earth metal halide salt, and any combination thereof.

8. The method of claim 1 , wherein the treatment fluid has an apparent viscosity of about 100 cP or less at a shear rate of 100 sec −1 and a temperature of about 250° F.

9. The method of claim 1 , wherein the salting out inhibitor comprises a quaternary ammonium salt.

10. The method of claim 1 , wherein the salting out inhibitor comprises a polyquaternium compound.

11. The method of claim 1 , wherein the salting out inhibitor comprises an ester of phosphonic acid.

12. A system comprising:
a treatment fluid comprising an aqueous base fluid, a salting out inhibitor, a gelling agent, one or more salts, and a gravel material, wherein the salting out inhibitor is selected from the group consisting of: an oligomer comprising one or more quaternary ammonium cations, a polymer comprising one or more quaternary ammonium cations, a source of one or more phosphate anions, and any combination thereof, and wherein the gelling agent is a polysaccharide gelling agent;
a production tubing;
a screen coupled to the production tubing; and

a pumping system fluidically coupled to the production tubing, wherein the pumping system is capable of pumping the gravel packing fluid through the production tubing.

13. The system of claim 12 , wherein the one or more salts are present in the treatment fluid in an amount of from about 8.5 lb/gal to about 14.5 lb/gal.

14. A method comprising:
forming a treatment fluid comprising an aqueous base fluid, a salting out inhibitor, a gelling agent, and one or more salts, wherein forming the treatment fluid comprises:
providing a first fluid comprising the aqueous base fluid, the gelling agent, and the salting out inhibitor, wherein the salting out inhibitor is selected from the group consisting of: an oligomer comprising one or more quaternary ammonium cations, a polymer comprising one or more quaternary ammonium cations, a source of one or more phosphate anions, and any combination thereof, and
adding the one or more salts to the first fluid; and
placing the treatment fluid into at least a portion of a subterranean formation.

15. The method of claim 14 , wherein forming the treatment fluid comprises adding a gravel material to the first fluid.

16. The method of claim 15 , further comprising allowing the gravel material to form a gravel pack in at least the portion of the subterranean formation.

17. The method of claim 14 , wherein the gelling agent is selected from group consisting of: xanthan, scleroglucan, diutan, succinoglycan, guar, hydroxyethyl cellulose, a derivative of the foregoing, and any combination thereof.

18. The method of claim 14 , wherein the one or more salts are present in the treatment fluid in an amount of from about 8.5 lb/gal to about 14.5 lb/gal.

Assignees

• Halliburton Energy Services Inc

Inventors

• Eluru Sairam
• Meher Pratiksha Shivaji
• Prakash Chetan
• Borra Sandeep Kumar

Classifications

• C09K8/575 Primary

  containing organic compounds · CPC title

• C09K8/68

  containing organic compounds · CPC title

• C09K8/80

  Compositions for reinforcing fractures, e.g. compositions of proppants used to keep the fractures open · CPC title

• C09K8/52

  Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning · CPC title

• E21B43/04 Primary

  Gravelling of wells · CPC title