Carbon dioxide sequestered cement for well cementing
AssigneeChevron U.S.A. Inc.
InventorsCaleb Kimbrell Carroll, Deryck Edward Matthew Williams
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Abstract
A method of making a cement composite can include contacting an aqueous solution comprising calcium ions with a carbon dioxide source producing a carbonated aqueous solution. Fine particles can be submerged in the carbonated aqueous solution to produce microaggregate particles comprising the fine particles coated with calcium carbonate. The microaggregate particles can be combined with cement particles to produce the cement composite. The cement composite can be used in cementing applications for hydrocarbon wells including for casing liners and well plugs.
Claims5
A method of making a cement composite for a hydrocarbon well, the method comprising:
- contacting an aqueous solution comprising calcium ions with a carbon dioxide source producing a carbonated aqueous solution;
- submerging fine particles in the carbonated aqueous solution to produce microaggregate particles comprising the fine particles coated with calcium carbonate;
- and
- blending the microaggregate particles with cement particles to produce the cement composite,
- wherein the fine particles comprise a silicon dioxide content of greater than 75%,
- wherein the fine particles have a D50 value between 3 microns and 35 microns before the fine particles are coated with the calcium carbonate, and
- wherein the fine particles have a D50 value between 25 microns and 60 microns after being coated with the calcium carbonate.
Dependencies are inferred from the claim text.