

Integrated Viscosity-variable Acid Technique
DATE : 2021-09-09 VIEWS : 525The integrated viscosity- variable acid system, having properties of ‘multi-functions’ and ‘viscosity varying in? three dimensions’, can achieve transformations among acidic slippery water, low viscosity, gelled acid, high viscosity acid functions. The variable viscosity time can be adjusted from 2-8 minutes and the viscosity can be adjusted from 3-255 mPa · s, which completely meet the needs of deep acid fracturing stimulation for 180 ℃ carbonate rock reservoirs.
①Acidizing and acid pressing of carbonate reservoir;
②80-180℃ reservoir;
③Open hole and casing completions;
④Gas and oil Wells;
Advantage
①Compared with conventional acid pressing, acid etching cracks have deeper penetration distance and higher conductivity
②The process of immediate matching and injection saves the construction period
③One kind of system can realize the integration of acid slippery water, low viscosity, medium viscosity and high viscosity into viscoacid
④Reservoir damage is small
Performance
①Acid slippery water, low viscosity acid, gelling acid and crosslinked acid “four liquids in one”
②Slow 95% to achieve deep penetration
③The variable viscosity non-uniform etching is strong, and the conductivity of the conventional acid is increased by 50%
④Broken adhesive viscosity < 3mPa.s, the reservoir damage is small
⑤That is, with the injection, online change sticky acid, construction is simpler