Nitrogen flooding can reduce oil-water interfacial tension, which is beneficial to improving oil recovery efficiency; and the injected nitrogen can replenish reservoir energy and increase formation pressure.
Nitrogen foam flooding has a plugging and profile control effect. The foam first enters the high permeability layer, and the flow resistance will gradually increase. As the injection pressure increases, the foam can enter the low permeability layer in turn to increase the sweep coefficient.
Nitrogen surfactant composite huff and puff technology is mainly based on nitrogen huff and puff technology, adding surfactants for oil recovery. Under the high pressure of gas, the surfactants enter farther from the wellbore area, quickly stripping more crude oil from the pores to form a water-in-oil emulsion with lower viscosity, so as to improve the oil well huff and puff effect, extend the production cycle and improve the oil washing efficiency.

The service market is distributed in PetroChina Tarim Oilfield and Sinopec Northwest Oilfield, etc.