Internal breakers encapsulated by calcium carbonate formed from sequestered carbon dioxide
AssigneeChevron U.S.A. Inc.
InventorSandra Liliana Gomez-Nava
Life of this patent
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Abstract
A wellbore fluid composition comprises synthetic calcium carbonate coated internal breaker particles. The synthetic calcium carbonate coated internal breaker particles comprise substrate particles, each of the substrate particles comprising an oxidizer. The substrate particles have a coating of synthetic calcium carbonate surrounding each of the substrate particles. The coating of synthetic calcium carbonate is formed by contacting an ammoniated aqueous solution with a carbon dioxide source producing a carbonated ammoniated aqueous solution, and contacting the carbonated ammoniated aqueous solution with the substrate particles to produce the composition of synthetic calcium carbonate coated internal breaker particles.
Claims20
A method of making synthetic calcium carbonate coated internal breaker particles for use in a wellbore fluid composition, the method comprising:
- contacting an ammoniated aqueous solution with a carbon dioxide source producing a carbonated ammoniated aqueous solution;
- and
- contacting the carbonated ammoniated aqueous solution with substrate particles to produce synthetic calcium carbonate coated internal breaker particles, wherein the substrate particles are coated with synthetic calcium carbonate and the substrate particles comprise an oxidizer.
A composition of synthetic calcium carbonate coated internal breaker particles comprising:
- substrate particles, each of the substrate particles comprising an oxidizer;
- and
- a coating of synthetic calcium carbonate surrounding each of the substrate particles, wherein the coating of synthetic calcium carbonate is formed by:
- contacting an ammoniated aqueous solution with a carbon dioxide source producing a carbonated ammoniated aqueous solution;
- and
- contacting the carbonated ammoniated aqueous solution with the substrate particles to produce the composition of synthetic calcium carbonate coated internal breaker particles.
A method of protecting a formation during an operation on a well, the method comprising:
- forming a blend of calcium carbonate particles, wherein at least a portion of the blend of calcium carbonate particles are synthetic calcium carbonate coated internal breaker particles formed from captured carbon dioxide;
- combining the blend of calcium carbonate particles with a base fluid, a viscosifier, a weighting agent, and a fluid loss control agent to produce a wellbore fluid composition;
- and
- pumping the wellbore fluid composition into the well to a location adjacent to a reservoir zone of the formation.
Dependencies are inferred from the claim text.