CEMENT SLURRIES, CURED CEMENT AND METHODS OF MAKING AND USE THEREOF
First Claim
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1. A method of making a cement slurry comprising:
- mixing cement precursor material, Saudi Arabian volcanic ash acquired from Saudi Arabia, and an aqueous solution to form the cement slurry, in which the Saudi Arabian volcanic ash comprises SO3, CaO, SiO2, Al2O3, Fe2O3, MgO, and K2O and the cement slurry is free of any other SiO2 additive.
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Abstract
Cement slurries, cured cements, and methods of making cured cement and methods of using cement slurries are provided. The cement slurries have, among other attributes, increased yield point, reduced density, improved mechanical properties, increased resistance to H2S, and may be used, for instance, in the oil and gas drilling industry. The cement slurry comprises cement precursor material, Saudi Arabian volcanic ash, and an aqueous solution. The Saudi Arabian volcanic ash comprises SO3, CaO, SiO2, Al2O3, Fe2O3, MgO, and K2O and the cement slurry is free of any other SiO2 additive.
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11 Claims
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1. A method of making a cement slurry comprising:
mixing cement precursor material, Saudi Arabian volcanic ash acquired from Saudi Arabia, and an aqueous solution to form the cement slurry, in which the Saudi Arabian volcanic ash comprises SO3, CaO, SiO2, Al2O3, Fe2O3, MgO, and K2O and the cement slurry is free of any other SiO2 additive. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of making a cement slurry comprising:
mixing cement precursor material, from 8 to 60 wt. % BWOC Saudi Arabian volcanic ash acquired from Saudi Arabia, and an aqueous solution to form the cement slurry, in which the Saudi Arabian volcanic ash comprises from 0.05 wt. % to 0.2 wt. % SO3, from 5 wt. % to 10 wt. % CaO, from 40 wt. % to 50 wt. % SiO2, from 10 wt. % to 20 wt. % Al2O3, from 10 wt. % to 15 wt. % Fe2O3, from 5 wt. % to 10 wt. % MgO, and from 0.5 wt. % to 5 wt. % K2O; and the cement slurry is free of any other SiO2 additive, has a density of from 110 to 160 lb/ft3, and has a yield point of from 5 to 70 lbf/100ft2.
Specification