Salting out inhibitors for use in treatment fluids
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.
1. A treatment fluid comprising:
an aqueous base fluid;
at least one salting out inhibitor, wherein the at least one 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;
a polysaccharide gelling agent; and
one or more salts.
2. The treatment fluid of claim 1 , wherein the treatment fluid further comprises a gravel material.
3. The treatment fluid of claim 1 , wherein the polysaccharide gelling agent comprises at least one gelling agent selected from group consisting of: xanthan, scleroglucan, diutan, succinoglycan, guar, hydroxyethyl cellulose, a derivative of the foregoing, and any combination thereof.
4. The treatment fluid 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.
5. The treatment fluid 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.
6. The treatment fluid 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.
7. The treatment fluid of claim 1 , wherein the salting out inhibitor comprises a quaternary ammonium salt.
8. The treatment fluid of claim 1 , wherein the salting out inhibitor comprises a polyquaternium compound.
9. The treatment fluid of claim 1 , wherein the salting out inhibitor comprises an ester of phosphonic acid.
10. A treatment fluid comprising:
an aqueous base fluid;
a gravel material;
at least one salting out inhibitor, wherein the at least one 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;
a gelling agent, wherein the gelling agent is not hydroxy propyl starch phosphate; and
one or more salts.
11. The treatment fluid of claim 10 , wherein the gelling agent comprises a polysaccharide gelling agent.
12. The treatment fluid of claim 11 , 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.
13. The treatment fluid of claim 11 , 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.
14. The treatment fluid of claim 11 , 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.
15. The treatment fluid of claim 11 , wherein the salting out inhibitor comprises a quaternary ammonium salt.
16. The treatment fluid of claim 11 , wherein the salting out inhibitor comprises a polyquaternium compound.
17. The treatment fluid of claim 11 , wherein the salting out inhibitor comprises an ester of phosphonic acid.
18. The treatment fluid of claim 11 , wherein the salting out inhibitor is present in an amount of about 10 gal/Mgal or less by volume of the treatment fluid.
19. The treatment fluid of claim 11 , wherein the gravel comprises sand.
20. The treatment fluid of claim 10 , wherein the gelling agent comprises at least one polysaccharide gelling agent selected from group consisting of: xanthan, scleroglucan, diutan, succinoglycan, guar, hydroxyethyl cellulose, a derivative of the foregoing, and any combination thereof.