Acidizing/stimulation

Surface-Modified Nanoparticle Gelled-Acid System Stimulates Without Formation Damage

The authors describe a self-breaking, formation-damage-free, novel nanoparticle-based gelled-acid system to replace polymer-based gelled-acid systems.

Acid-solution gelation in an inverted pressure tube.
Fig. 1—Acid-solution gelation in an inverted pressure tube.

Gelled-acid systems based on the gelation of hydrochloric acid (HCl) are used extensively in both matrix and fracture acidizing to prevent acidizing-fluid leakoff. However, these systems can lead to formation damage. To mitigate this risk, the authors have developed a self-breaking, formation-damage-free, novel nanoparticle-based gelled-acid system to replace polymer-based gelled-acid systems.

Nanoparticle-Based Gelled-Acid System

The complete paper showcases a method for gelling up an acid formulation for stimulating a carbonate reservoir. The technique is based on surface-modified nanoparticles.

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