The invention provides a nano oil-water phase permeability
regulator and a preparation method thereof. The nano oil-water phase osmotic adjusting agent is prepared from the following raw materials in percentage by
mass: 1.5 to 3 percent of scleroglucan pre-crosslinked particles, 2.5 to 5 percent of nano modified
acrylamide, 0.2 to 3 percent of initiator, 0.2 to 2 percent of
formaldehyde, 0.3 to 5 percent of diethanol amine, 0.5 to 5 percent of
hydrochloric acid and the balance of water. Due to the scleroglucan pre-crosslinked particles, the thermosensitivity and the biological
environmental protection property of the gel are improved, and the performances of
salt resistance,
temperature resistance, durability and the like are improved. Meanwhile, nano-modified
acrylamide is obtained by
grafting and modifying the surfaces of SiO2 particles and introducing cationic links and hydrophilic groups by adopting a
silane coupling method, so that the nano-modified
acrylamide has the adsorption and film-forming effects of
polymer gel and a nano material, and the effect that 1 + 1 is greater than 2 is achieved. After being heated by the formation temperature, the particles expand to take the effects of occupying space, blocking and controlling water. The oil-water
relative permeability of an oil layer is improved, water plugging and oil plugging are achieved, and important significance is achieved for plugging and controlling water in the extra-high
water cut period and improving the productivity of an
oil well.