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US 2021/0032525 A1Published application
Spacer fluids and cement slurries that include surfactants
AssigneeSaudi Arabian Oil Company
InventorsAbdullah Al-Yami, Hussain AlBahrani, Vikrant Wagle
Life of this patent
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Abstract
According to at least one embodiment of the present disclosure, a well bore cementing system may comprise a spacer fluid and a cement slurry. The spacer fluid may be positioned within a well bore, and the spacer fluid may comprise a first surfactant package comprising one or more surfactants. The cement slurry may be positioned within the well bore, and the cement slurry may comprise a second surfactant package comprising one or more surfactants.
Claims35
A well bore cementing system comprising:
- a spacer fluid positioned within a well bore, the spacer fluid comprising:
- a base fluid that is an aqueous-based fluid;
- and
- a first surfactant package consisting essentially of one or more surfactants having the chemical structure R1-(OC2H4)x1—OH, where R1 is a hydrocarbyl group having from 5 to 20 carbon atoms, and x1 is an integer from 5 to 15, where the one or more surfactants of the first surfactant package has a HLB of from 11 to 13.5;
- and
- a cement slurry positioned within the well bore, the cement slurry comprising a second surfactant package consisting essentially of one or more surfactants having the chemical structure R2-(OC2H4)x2—OH, where R2 is a hydrocarbyl group having from 5 to 20 carbon atom, and x2 is an integer from 5 to 15, where the one or more surfactants of the second surfactant package has a HLB of from 11 to 13.5.
3 more elements
A method for cementing a well bore, the method comprising:
- introducing a spacer fluid into the well bore such that at least a portion of a drilling fluid positioned in the well bore is displaced by the spacer fluid, the spacer fluid comprising:
- a base fluid that is an aqueous-based fluid;
- and
- a first surfactant package consisting essentially of one or more surfactants having the chemical structure R1-(OC2H4)x1—OH, where R1 is a hydrocarbyl group having from 5 to 20 carbon atoms, and x1 is an integer from 5 to 15, where the one or more surfactants of the first surfactant package has a HLB of from 11 to 13.5;
- and
- introducing a cement slurry into the well bore such that at least a portion of the spacer fluid is displaced by the cement slurry, the cement slurry comprising a second surfactant package consisting essentially of one or more surfactants having the chemical structure R2-(OC2H4)x2—OH, where R2 is a hydrocarbyl group having from 5 to 20 carbon atom, and x2 is an integer from 5 to 15, where the one or more surfactants of the second surfactant package has a HLB of from 11 to 13.5.
3 more elements
Dependencies are inferred from the claim text.