Patent ID: 11959013
Assignee: HALLIBURTON ENERGY SERVICES, INC.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  E | IPC C  E

Claim 12:
13. A method comprising:
introducing a treatment fluid comprising an aqueous base fluid, at least one viscoelastic surfactant, a divalent salt, magnesium sulfate heptahydrate (MgSO4·7H2O), and magnesium oxide (MgO) into a wellbore penetrating at least a portion of a subterranean formation; and
allowing the treatment fluid to at least partially set, wherein the treatment fluid exhibits a right angle set to at least partially plug a loss zone,
wherein the magnesium sulfate heptahydrate is present in a concentration of about 20% to about 35% by weight of the treatment fluid and wherein the magnesium oxide is present in a concentration of about 20% to about 35% by weight of the treatment fluid.