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US 12,467,335 B2Granted
Geopolymer compositions and methods
AssigneeSchlumberger Technology Corporation
InventorsNathan Fischer, Yeukayi Nenjerama, Christopher Parton, Randy Tercero, Mark Meade, Geoffrey Landry, Andrey Yakovlev, Anatoly Medvedev, Bipin Jain
Life of this patent
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Abstract
Geopolymeric compositions are presented that are useful for cementing subterranean wells. The compositions may contain an aluminosilicate source, a metal silicate, an alkali activator and a slurry density modifier that may contain uintaite, vitrified shale, petroleum coke or coal or combinations thereof. Methods for placing the geopolymeric compositions in subterranean wells are also presented.
Claims20
A method, comprising:
- preparing a geopolymer precursor comprising an aluminosilicate source, a metal silicate, an alkali or alkaline earth activator, a carrier fluid including water, slurry density modifier particles, and a viscosifier, the viscosifier including diutan gum having a molecular weight greater than 1,000,000 g/mol, the viscosifier having a viscosifier concentration of between 0.14 g/L and 1.4 g/L, wherein the geopolymer precursor is pumpable and has a solids volume fraction of 35% to 75%;
- placing the geopolymer precursor in a subterranean well;
- and
- hardening the geopolymer precursor into a solid geopolymer.
1 more element
A geopolymer precursor, comprising:
- an aluminosilicate source, a metal silicate, an alkali or alkaline earth activator, a carrier fluid including water, slurry density modifier particles, and a viscosifier, the viscosifier including diutan gum having a molecular weight of at least 1,000,000 g/mol, the viscosifier having a viscosifier concentration of between 0.14 g/L and 1.4 g/L, wherein the geopolymer precursor is pumpable and has a solids volume fraction of 35% to 75%.
A method, comprising:
- obtaining a pumpable geopolymer precursor comprising an aluminosilicate source, a metal silicate, an alkali or alkaline earth activator, a carrier fluid including water, slurry density modifier particles, and a viscosifier, the viscosifier including diutan gum having a molecular weight of at least 1,000,000 g/mol, the viscosifier having a viscosifier concentration of between 0.14 g/L and 1.4 g/L, wherein the pumpable geopolymer precursor has a solids volume fraction of 35% to 75%;
- placing the pumpable geopolymer precursor in a subterranean well, and hardening the pumpable geopolymer precursor into a solid geopolymer.
Dependencies are inferred from the claim text.