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Integrated Viscosity-variable Acid Technique

DATE : 2021-09-09  VIEWS : 525

The 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.

 

Application Scope

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

 

 

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