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Application of metal oxide-based cements
A method comprising: introducing a treatment fluid comprising a non-aqueous base fluid, magnesium oxide, a sulfate salt, and a viscosifier into a wellbore penetrating at least a portion of a subterranean formation comprising a loss zone; allowing the treatment fluid to contact an aqueous fluid in the wellbore or the subterranean formation; and allowing the treatment fluid to at least partially set, wherein the treatment fluid at least partially plugs the loss zone. Preferably, the viscosity modifying agent is an attapulgite clay and may be present from 1 wt.% to 60 wt.% of the composition. The magnesium oxide may be sized from 30-300 micrometres and be present from 0.1 weight% to 30 per cent by weight of the treatment fluid. The sulfate salt may account for 0.1 wt.% to 20 wt.% of the treatment fluid and may be a size fraction of 25-4000 microns. Treatment fluid may have a density of from 480-3000 kg.m-3.
Application of metal oxide-based cements
A method comprising: introducing a treatment fluid comprising a non-aqueous base fluid, magnesium oxide, a sulfate salt, and a viscosifier into a wellbore penetrating at least a portion of a subterranean formation comprising a loss zone; allowing the treatment fluid to contact an aqueous fluid in the wellbore or the subterranean formation; and allowing the treatment fluid to at least partially set, wherein the treatment fluid at least partially plugs the loss zone. Preferably, the viscosity modifying agent is an attapulgite clay and may be present from 1 wt.% to 60 wt.% of the composition. The magnesium oxide may be sized from 30-300 micrometres and be present from 0.1 weight% to 30 per cent by weight of the treatment fluid. The sulfate salt may account for 0.1 wt.% to 20 wt.% of the treatment fluid and may be a size fraction of 25-4000 microns. Treatment fluid may have a density of from 480-3000 kg.m-3.
Application of metal oxide-based cements
DONALD LEE WHITFILL (author) / SHARATH SAVARI (author) / REEM ALBURAIKAN (author) / WASEEM ABDULRAZZAQ (author) / DALE E JAMISON (author)
2022-04-13
Patent
Electronic Resource
English
VISCOELASTIC SURFACTANT-BASED TREATMENT FLUIDS FOR USE WITH METAL OXIDE-BASED CEMENTS
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