Consolidating spacer fluids and methods of use
First Claim
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1. A consolidating spacer fluid for separating a drilling fluid and a cement composition in a well bore, comprising:
- water in an amount of about 15% to about 95% by weight of the spacer fluid;
cement kiln dust;
at least one additive selected from the group consisting of gypsum, bentonite, hydroxyethyl cellulose, sodium silicate, a hollow microsphere, gilsonite, perlite, a gas, an organic polymer, a biopolymer, latex, ground rubber, a surfactant, crystalline silica, amorphous silica, silica flour, fumed silica, nano-clay, salt, fiber, hydratable clay, rice husk ash, micro-fine cement, metakaolin, zeolite, shale, pumicite, Portland cement, Portland cement interground with pumice, barite, slag, lime, and any combination thereof;
fly ash in an amount of about 1% to about 60% by weight of the spacer fluid; and
a free water control additive in an amount of about 0.1% to about 16% by weight of the spacer fluid;
wherein the consolidating spacer fluid has a zero gel time of about 4 hours or less under predetermined well bore conditions, wherein the consolidating spacer fluid is disposed in the well bore between the drilling fluid and the cement composition.
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Abstract
Disclosed are spacer fluids and methods of use in subterranean formations. Embodiments may include use of consolidating spacer fluids in displacement of drilling fluids from a well bore annulus.
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Citations
18 Claims
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1. A consolidating spacer fluid for separating a drilling fluid and a cement composition in a well bore, comprising:
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water in an amount of about 15% to about 95% by weight of the spacer fluid; cement kiln dust; at least one additive selected from the group consisting of gypsum, bentonite, hydroxyethyl cellulose, sodium silicate, a hollow microsphere, gilsonite, perlite, a gas, an organic polymer, a biopolymer, latex, ground rubber, a surfactant, crystalline silica, amorphous silica, silica flour, fumed silica, nano-clay, salt, fiber, hydratable clay, rice husk ash, micro-fine cement, metakaolin, zeolite, shale, pumicite, Portland cement, Portland cement interground with pumice, barite, slag, lime, and any combination thereof; fly ash in an amount of about 1% to about 60% by weight of the spacer fluid; and a free water control additive in an amount of about 0.1% to about 16% by weight of the spacer fluid; wherein the consolidating spacer fluid has a zero gel time of about 4 hours or less under predetermined well bore conditions, wherein the consolidating spacer fluid is disposed in the well bore between the drilling fluid and the cement composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A consolidating spacer fluid for separating a drilling fluid and a cement composition in a well bore, comprising:
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water in an amount of about 40% to about 65% by weight of the spacer fluid; fly ash in an amount of about 1% to about 10% by weight of the spacer fluid; a partially calcined kiln feed comprising SiO2, Al2O3, Fe2O3, CaO, MgO, SO3, Na2O, and K2O; and a free water control additive in an amount of about 0.1% to about 5% by weight of the spacer fluid, wherein the free water control additive comprises at least one additive selected from the group consisting of bentonite, amorphous silica, hydroxyethyl cellulose, and any combination thereof; wherein the consolidating spacer fluid has a zero gel time of about 4 hours or less under predetermined well bore conditions, and wherein the consolidating spacer fluid is disposed in the well bore between the drilling fluid and the cement composition. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification