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US 11,597,867 B2Granted
Viscoelastic-surfactant treatment fluids having oxidizer
AssigneeSaudi Arabian Oil Company
InventorsKatherine Leigh Hull, Rajesh Kumar Saini, Brady Kevin Crane, Amy J. Cairns
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Abstract
A method and reactive treatment fluid for treating a wellbore for filter cake removal, including providing the reactive treatment fluid having a viscoelastic surfactant (VES) into a wellbore in a subterranean formation and attacking the filter cake via the reactive treatment fluid.
Claims16
A reactive treatment fluid comprising:
- a reactive treatment fluid for removing filter cake from a wellbore in a subterranean formation, the reactive treatment fluid comprising:
- a reactive breaker comprising an oxidizing salt to break polymer in the filter cake;
- a viscoelastic surfactant (VES) to gel the reactive treatment fluid to give the reactive treatment fluid as a VES gel for retention of the oxidizing salt for breaking the polymer in the filter cake at an end portion of a lateral of the wellbore;
- an acid-generating material to form acid via heat from the subterranean formation to attack weighting agent from drilling fluid in the filter cake, wherein the acid lowers viscosity of the VES gel.
1 more element
Dependencies are inferred from the claim text.