The invention discloses a blocking remover and a preparation method thereof. The blocking remover comprises following raw materials:
Brevibacillus borstelensis biosurfactant
fermentation liquid and hydrophobic
nano silicon dioxide, and an emulsifier, an anti-scaling agent, an anti-swelling agent and a cosolvent can also be contained. The preparation method of the blocking remover comprises the following steps: firstly, adding the biosurfactant
fermentation liquid, the emulsifier and the cosolvent into a reaction container, heating, and uniformly stirring; secondly, adding the anti-scaling agent and the anti-swelling agent into the solution obtained in the former step, and stirring for dissolving; and finally, continuously heating a prepared solution, adding hydrophobic
inorganic nanoparticles into the reaction container, and uniformly stirring. The blocking remover has low oil-water interfacial tension, can effectively strip and emulsify
residual oil and colloidal
asphaltene deposits in a medium-low permeable layer to form a low-
viscosity emulsion, remove organic blocking,
resist hypersalinity, can be completely degraded by microorganisms, and is green and environment-friendly.