Methods of making and using a thixotropic cement composition
AssigneeHalliburton Energy Services, Inc.
InventorsSandip Prabhakar Patil, Malharrao Hambirrao Jadhav, Ganesh Shriniwas Pangu
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Abstract
Disclosed herein is a method of servicing a wellbore penetrating a subterranean formation with a thixotropic cement composition. The thixotropic cement composition comprises a cementitious material, maltodextrin, and an aqueous fluid, has a 10-minute gel strength of from about 30 lbf/100 ft2 to about 300 lbf/100 ft2, and can be used to reduce lost circulation in the wellbore. By incorporating maltodextrin into the thixotropic cement composition as disclosed herein, the thixotropic cement composition can have a similar 10-minute gel strength and an increased thickening time when compared to a reference composition.
Claims20
A method of servicing a wellbore penetrating a subterranean formation, comprising:
- introducing a thixotropic cement composition proximate a location of a lost circulation zone,
- wherein the thixotropic cement composition comprises a cementitious material, maltodextrin, a viscosifier and an aqueous fluid,
- wherein maltodextrin is present in the thixotropic cement composition in an amount of from about 0.5 wt. % to about 5 wt. %, based on the total weight of the thixotropic cement composition,
- wherein the thixotropic cement composition has a density in a range of from about 7 to about 13 pounds per gallon, and
- wherein the thixotropic cement composition has a 10-minute gel strength of from about 60 lbf/100 ft2 to about 300 lbf/100 ft2;
- allowing the thixotropic cement composition to flow into at least a portion of the lost circulation zone;
- and
- allowing the thixotropic cement composition to set.
A method of servicing a wellbore penetrating a subterranean formation, comprising:
- introducing a thixotropic cement composition proximate a location of a lost circulation zone,
- wherein the thixotropic cement composition consists essentially of a cementitious material, maltodextrin, an amorphous silica, a clay, a viscosifier, and an aqueous fluid,
- wherein maltodextrin is present in the thixotropic cement composition in an amount of from about 0.5 wt. % to about 5 wt. %, based on the total weight of the thixotropic cement composition,
- wherein the thixotropic cement composition has a 10-minute gel strength of from about 60 lbf/100 ft2 to about 300 lbf/100 ft2, and
- wherein the thixotropic cement composition has a density in a range of from about 7 to about 13 pounds per gallon;
- allowing the thixotropic cement composition to flow into at least a portion of the lost circulation zone;
- and
- allowing the thixotropic cement composition to set.
Dependencies are inferred from the claim text.