Ionic liquid chain transfer agent as well treatment additive

A method of treating a subterranean formation, comprising:

• contacting the subterranean formation with a well treatment additive,
• wherein the well treatment additive comprises:
• an ionic liquid consisting of a cation and an anion having the following formula:
• [R1R2R3R4N]+[X]−,
• wherein R1, R2, R3, and R4 are individually selected from the group consisting of an alkyl group, a hydroxyalkyl group, and a combination thereof provided that at least one of R1, R2, R3, or R4 is the hydroxyalkyl group, and
• wherein the anion X− consists of C2H5OSO3−, and
• an ionic liquid polymer that is a reaction product of methacrylamide and the ionic liquid,
• wherein the ionic liquid acts as a chain transfer agent and controls a molecular weight of the ionic liquid polymer, wherein the ionic liquid polymer has a molecular weight in a range of 25,000 to 50,000,
• wherein the ionic liquid that is remaining after formation of the reaction product and not in the ionic liquid polymer is present in an amount of about 1 wt % to about 10 wt % of the well treatment additive;
• wherein the ionic liquid polymer is present in an amount from about 0.1 wt % to about 55 wt %;
• and
• wherein the well treatment additive is present in a treatment fluid of the subterranean formation in an amount of about 0.1 wt % to about 0.6 wt % of the treatment fluid.