AGA 150

BLEND OF CATIONIC SURFACTANTS

Blend of cationic surfactants, which viscosify HCl acid by forming a macromolecular structure of oriented micelles. Used at temperatures to 150°F (66°C). Normal concentrations range from 20-40 gal/ 1000 gallons (20-40 L/mᵌ).

AGA 400 ME

Cationic, high-molecular weight, polyacrylamide copolymer

Cationic, high-molecular weight, polyacrylamide copolymer that viscosifies HCl acid and is the main component in a self-diverting, cross-linked acid system designed for use in high permeability limestones and dolomites up to 300°F (149°C). Concentration range is 15-40 gal/1000 gallons (15-40 L/mᵌ). The other additives in the system include a cross-linker, AGA-XL-1; pH buffer, AGA-Buffer-1; iron control agent, ICA-720.

Cross-Linkers & Stabilizers

AGA Buffer 1

Low pH solution of a proprietary organic buffer

Low pH solution of a proprietary organic buffer, used in the AGA 400 ME cross-linked acid system, to "lock" the pH at the proper range for complete cross-link. Normally used at 1-2 gal/1000 gallons (1-2 L/mᵌ) of gelled acid up to 300°F (149°C).

AGA XL 1

Low pH solution of a proprietary metal chloride cross-linker

Low pH solution of a proprietary metal chloride cross-linker that reacts with the polymer in AGA 400 ME to form longer polymer chains and increase the apparent viscosity of the gelled acid. System cross-links at pH 2.5-3.0 and breaks to initial viscosity as the pH continues to rise to 4.0-5.0. Normal concentration is 4-5 gal/1000 gallons (4-5 L/mᵌ) of gelled acid up to 300°F (149°C).

AGA XL 3

Low pH solution of a proprietary metal chloride cross-linker

Low pH solution of a proprietary metal chloride (non-iron) cross-linker that reacts with the polymer in AGA-400ME as the pH increases to increase the apparent viscosity and divert the live acid. Normal con- centration is 4-5 gal/1000 gallons (4-5 L/mᵌ) of gelled acid up to 300°F (149°C).

ICA 720

Organic acid sodium salt

Organic acid sodium salt that functions as an iron reducing agent & oxygen scavenger. It also provides pH stabilization in AGA 400 ME cross-linked acid system. Normal concentration is 4-10 pounds/1000 gallons (0.48-1.2 kg/m3) up to 300°F (149°C).