By using certain crosslinking and dispersing technology, the uniform DPG particle aqueous solution with controllable particle size was prepared with a bulk gel on the ground by a mechanical shearing method. Products with different particle size distribution, different strength and different reservoir conditions are made according to the needs. It has been applied in many oilfields in China, with a total of more than 200 wells and a validity period of more than 600 days.

Advantages：

（1）Wide particle size distribution, 100nm ~ 3.2mm;

（2）Low viscosity ( 5 ~ 10mPa·s );good injectability

（3）High shear resistance, good aggregation ability ;

（4）High temperature  resistance (150°C), high salt tolerance (3×10⁵ mg / L);

（5）Simple preparation process, available for online integration of production and injection

（6）Efficient preparation, 2-8tons / hour ;

（7）Environmentally friendly

Elongation Technique：

Temperature and salt tolerance DPG heterogeneous composite flooding technology

Temperature and salt tolerant gel dispersion foam flooding technology

Enhanced polymer binary / ternary composite flooding technology by gel dispersion

Low / ultra-low permeability CO₂ injection reservoir gas channeling channel control technology