from Huizhi Holdings：
Using in-situ synthesis method and surface modification technology, ' three small ' functional nanoparticles suitable for water injection development of tight reservoirs were developed. Stable dispersed water-based active nanofluids were prepared with surfactant ZLL as dispersant(4 ~ 30nm).
Application range：
Active nanofluid huff and puff in tight oil wells, fracturing & active nanofluid displacement integration 'in tight oil wells, depressurization and injection increase in water injection wells.
Technology Index：
（1）Low-cost;
（2）Industrial production, easy on-site operation : water dilution;
（3）The product can realize stable dispersion of water base and long validity period(>1 year);
（4）Temperature ≤ 130°C and salinity ≤ 30000mg / L;
（5）The nanofluids have excellent oil / water interfacial activity of 0.1~ 5 mN / m ( controllable );
（6）Nanofluids can reduce water injection pressure by 18 % and increase injection volume by 30%;
（7）Nanofluid imbibition displacement enhanced oil recovery by 30%, 8% higher than surfactant.
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