Lost circulation compositions and associated methods
First Claim
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1. A lost circulation composition comprising:
- hydraulic cement in an amount of about 0.1% to about 25% by weight of the lost circulation composition;
nano-particles having a particle size in a range from about 1 nanometer to about 100 nanometers and present in an amount of about 0.1% to about 10% by weight of the lost circulation composition, wherein the nano-particles comprise nano-particles selected from the group consisting of colloidal nano-silica, nano-alumina, nano-zinc oxide, nano-boron, nano-iron oxide, nano-calcium carbonate, and any combination thereof;
amorphous silica in an amount of about 0.1% to about 15% by weight of the lost circulation composition;
a nano-clay having a particle size in a range of from about 1 nanometer to about 100 nanometers and present in an amount of about 0.1% to about 2% by weight of the lost circulation composition; and
water in an amount of about 60% to about 80% by weight of the lost circulation composition;
wherein the lost circulation composition has a 10-second static gel strength of at least about 15 lbf/100 ft2 at room temperature,wherein the lost circulation composition has a 10-minute static gel strength of at least about 25 lbf/100 ft2 at room temperature,wherein the lost circulation composition is a sealing composition that prevents the migration of fluids.
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Abstract
An embodiment includes a method of servicing a well bore. The method may comprise introducing a lost circulation composition into a lost circulation zone, the lost circulation composition comprising hydraulic cement, nano-particles, amorphous silica, clay, and water. The method further may comprise allowing the lost circulation composition to set in the lost circulation zone. Another embodiment includes a lost circulation composition. The lost circulation may comprise hydraulic cement, nano-particles, amorphous silica, clay, and water.
456 Citations
27 Claims
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1. A lost circulation composition comprising:
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hydraulic cement in an amount of about 0.1% to about 25% by weight of the lost circulation composition; nano-particles having a particle size in a range from about 1 nanometer to about 100 nanometers and present in an amount of about 0.1% to about 10% by weight of the lost circulation composition, wherein the nano-particles comprise nano-particles selected from the group consisting of colloidal nano-silica, nano-alumina, nano-zinc oxide, nano-boron, nano-iron oxide, nano-calcium carbonate, and any combination thereof; amorphous silica in an amount of about 0.1% to about 15% by weight of the lost circulation composition; a nano-clay having a particle size in a range of from about 1 nanometer to about 100 nanometers and present in an amount of about 0.1% to about 2% by weight of the lost circulation composition; and water in an amount of about 60% to about 80% by weight of the lost circulation composition; wherein the lost circulation composition has a 10-second static gel strength of at least about 15 lbf/100 ft2 at room temperature, wherein the lost circulation composition has a 10-minute static gel strength of at least about 25 lbf/100 ft2 at room temperature, wherein the lost circulation composition is a sealing composition that prevents the migration of fluids. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A lost circulation composition comprising:
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hydraulic cement in an amount of about 0.1% to about 25% by weight of the lost circulation composition; nano-particles having a particle size in a range of from about 1 nanometer to about 100 nanometers and present in an amount of about 0.1% to about 10% by weight of the lost circulation composition, wherein the nano-particles comprise nano-particles selected from the group consisting of colloidal nano-silica, nano-alumina, nano-zinc oxide, nano-boron, nano-iron oxide, nano-calcium carbonate, and any combination thereof; amorphous silica in an amount of about 0.1% to about 15% by weight of the lost circulation composition; a nano-clay having a particle size in a range of from about 1 nanometer to about 100 nanometers and present in an amount of about 0.1% to about 2% by weight of the lost circulation composition; and water in an amount of about 60% to about 80% by weight of the lost circulation composition; wherein the lost circulation composition has a density of about 6 pounds per gallon to about 14 pounds per gallon, wherein the lost circulation composition has a 10-second static gel strength of at least about 15 lbf/100 ft2 at room temperature, wherein the lost circulation composition has a 10-minute static gel strength of at least about 25 lbf/100 ft2 at room temperature, wherein the lost circulation composition is a sealing composition that prevents the migration of fluids. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A lost circulation composition comprising:
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Portland cement in an amount of about 10% to about 20% by weight of the lost circulation composition; colloidal nano-silica in an amount of about 0.5% to about 4% by weight of the lost circulation composition, the colloidal nano-silica having a particle size of about 1 nanometer to about 100 nanometers; amorphous silica in an amount of about 5% to about 10% by weight of the lost circulation composition; synthetic nano-clay in an amount of about 0.5% to about 2% by weight of the lost circulation composition; and water in an amount of about 60% to about 75% by weight of the lost circulation composition, wherein the lost circulation composition has a 10-second static gel strength of at least about 15 lbf/100 ft2 at room temperature, wherein the lost circulation composition has a 10-minute static gel strength of at least about 25 lbf/100 ft2 at room temperature, wherein the lost circulation composition is a sealing composition that prevents the migration of fluids. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification