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US 11,261,364 B2Granted
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
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 12.5 to 13;
- 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 atoms, 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 12.5 to 13, where the first surfactant package includes all the surfactants of the spacer fluid, and the second surfactant package includes all the surfactants of the cement slurry.
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 12.5 to 13;
- 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 atoms, 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 12.5 to 13, where the first surfactant package includes all the surfactants of the spacer fluid, and the second surfactant package includes all the surfactants of the cement slurry.
3 more elements
Dependencies are inferred from the claim text.