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US 2026/0234465 A1Published application
Method 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.
Claims20
An aqueous composition, comprising:
- water;
- an acid having a non-zero, molecular weight less than about 400 Daltons, or an ammonium or sodium salt thereof;
- a hydrogen fluoride (HF) source;
- and
- a fluoride scale inhibitor comprising hydroxyethylidene diphosphonic acid (HEDP)or a salt thereof, wherein a concentration of the fluoride scale inhibitor in the aqueous composition is greater than or equal to about 0.1 wt% and less than about 2.0 wt%.
2 more elements
An aqueous composition, comprising:
- water;
- an acid, or an ammonium or sodium salt thereof;
- a hydrogen fluoride (HF) source;
- and
- a fluoride scale inhibitor comprising:
- hydroxyethylidene diphosphonic acid (HEDP)or a salt thereof, 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC) or a salt thereof, amino trimethylene phosphonic acid (ATMP) or a salt thereof, diethylene triamine penta (methylene phosphonic acid) (DTPMPA) or a salt thereof, 2-hydroxy phosphonoacetic acid (HPAA) or a salt thereof, polyamino polyether methylene phosphonic acid (PAPEMP), bis(hexamethylene triamine penta (methylene phosphonic acid)) (BHMTPMP) or a salt thereof, hydroxyethylamino-di(methylene phosphonic acid) (HEMPA) or a salt thereof, ethylene diamine tetra (methylene phosphonic acid) (EDTMPA) or a salt thereof, or hexamethylenediaminetetra (methylenephosphonic acid) (HMDTMPA) or a salt thereof, or a combination thereof;
- wherein a concentration of the fluoride scale inhibitor in the aqueous composition is greater than or equal to about 0.1 wt% and less than about 2.0 wt%.
4 more elements
Dependencies are inferred from the claim text.