Thixotropic cement slurry with graphene oxide

A method of servicing a wellbore penetrating a subterranean formation, the method comprising:

• preparing a thixotropic cement composition, wherein the thixotropic cement composition comprises a cementitious material, silica fume, added graphene oxide, and an aqueous fluid, wherein the silica fume comprises an amount of graphene oxide ranging from equal to or greater than 0 to equal to or less than 0.5 percent by weight, wherein the added graphene oxide is in addition to the amount of graphene oxide in the silica fume, wherein the thixotropic cement composition comprises a total amount of graphene oxide, and wherein the total amount of the graphene oxide is greater than the amount of graphene oxide in the silica fume;
• wherein the preparing further comprises selecting an amount of the added graphene oxide to provide the total amount of graphene oxide such that a 10-minute gel strength of the thixotropic cement composition is greater than a 10-minute gel strength of a reference composition, wherein the 10-minute gel strengths are measured in accordance with test standard API-RP-10B-2, and wherein the reference composition does not include the added graphene oxide and is otherwise identical to the thixotropic cement composition;
• and
• introducing the thixotropic cement composition into the wellbore and allowing the thixotropic cement composition to set.