Schlumberger Technology Corporation

Haiyan Zhao

Patrice Abivin

Murtaza Ziauddin

Temiloluwa Iyenoma Yusuf

Philippe Enkababian

Juan-Carlos Santamaria

Abraham Ryan

Compositions for matrix acidizing and fracture acidizing contain water, an acid, and an acid retarding agent including an alkyl dimethyl benzyl ammonium chloride surfactant. The composition may be prepared and injected into a wellbore penetrating a subterranean formation.

Single-phase retarded acid based on a cationic surfactant

Treatment of hydrocarbon formations using single-phase aqueous acid blends that contain arginine is described herein. The single-phase aqueous fluid includes one or more strong acid molecules and arginine in water, wherein the one or more strong acid molecules are present in a concentration range of 7.5 wt % to 28 wt %, based on the weight of the aqueous fluid, and arginine is present in a molar ratio of arginine to the one or more strong acid molecules that is from 1:100 to 1:5.

Single-phase retarded acid systems using amino acids

Treatment of hydrocarbon formations using single-phase aqueous acid blends that contain lysine is described herein. The single-phase aqueous fluid includes one or more strong acid molecules and lysine in water, wherein the one or more strong acid molecules are present in a concentration range of 15 wt % to 28 wt %, based on the weight of the aqueous fluid, and lysine is present in a molar ratio of lysine to the one or more strong acid molecules that is from 1:15 to 1:40, and a viscoelastic surfactant.

Methods and compositions for treating a siliceous geologic formation are described herein. An aqueous treatment composition for treating such formations includes an acid having molecular weight less than about 200, or an ammonium or sodium salt thereof, an HF source, and from about 0.1 wt % to about 2.0 wt % of a fluoride scale inhibitor, the aqueous treatment composition having a pH from about 1.0 to about 3.0.

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Sugar Land, TX, United States of America

Haiyan Zhao