■ Strong ability to roar into small holes
■ High oil displacement efficiency
■ Strong temperature and salt tolerance
Water, oil, surfactant and cosurfactant are emulsified to form nano-oil displacement agent. The particle size of nano-oil displacement agent is less than or equal to 30nm, which can effectively enter the deep micro-nano channel of tight oil / shale reservoir. The residual oil in smaller pores can be displaced by emulsification, stripping, wettability change and other mechanisms to improve reservoir development effect. It is suitable for reducing pressure and increasing injection, huff and puff oil recovery, pressure drive and so on.
Performance parameter：
(1) Small size ≤ 30nm.
(2) High thermal stability : Nanoemulsion interface is stable, high thermal stability, 120℃ aging 24hours, the particle size is basically unchanged.
(3) Salt tolerance : It is resistant to 50000mg / L filtered formation water.
(4) Small formation adsorption.
(5) strong oil washing ability : the average oil washing rate can reach 70%.
(6) The permeability of natural shale is higher than 20%.
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