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US 12,577,450 B2Granted
Compositions for single-stage treatment of siliceous subterranean formations
AssigneeSchlumberger Technology Corporation
InventorsKonstantin Viktorovich Vidma, Murtaza Ziauddin, Daniel Gettemy, Christopher S. Daeffler, Temiloluwa Iyenoma Yusuf
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Abstract
An aqueous composition includes an acid, or an ammonium or salt thereof; a hydrogen fluoride (HF) source; and a fluoride scale inhibitor. Various methods include providing the aqueous composition and performing a treatment operation using the aqueous composition.
Claims16
An aqueous composition, comprising consisting of:
- water;
- an acid controlling a pH of the aqueous composition, wherein the acid does not include a boric acid is hydrochloric acid (HCl);
- a hydrogen fluoride (HF) source comprising ammonium bifluoride, wherein a concentration of the HCl in the aqueous composition is greater than a concentration of the HF source in the aqueous composition;
- and
- a fluoride scale inhibitor, wherein a concentration of the fluoride scale inhibitor in the aqueous composition is greater than or equal to 0.1 wt % and less than 1.0 wt %.
2 more elements
An aqueous composition consisting of:
- water;
- an acid controlling a pH of the aqueous composition, wherein the acid is hydrochloric acid (HCl);
- a hydrogen fluoride (HF) source comprising ammonium bifluoride, wherein a concentration of the HCl in the aqueous composition is greater than a concentration of the HF source in the aqueous composition;
- a fluoride scale inhibitor, wherein a concentration of the fluoride scale inhibitor in the aqueous composition is greater than or equal to 0.1 wt % and less than 1.0 wt %;
- and
- at least one of a permanent clay stabilizer or a self-diverting additive.
3 more elements
Dependencies are inferred from the claim text.