The invention belongs to the field of oilfield development, and particularly relates to a low-permeability oil reservoir bio-based
microemulsion plug removal and augmented injection
system and an injection process thereof.The low-permeability oil reservoir bio-based
microemulsion plug removal and augmented injection
system comprises 0.5%-5% of bio-based surfactants, 0.8%-1.2% of inorganic salt, 1%-2% of light component oil, 1%-3% of
small molecule alcohol and the
balance water, the PH value of the finally formed
solution system is 7-7.5, the HLB solubilizing value is 13-16, and the injection process is simple. The dissolving capacity of substances such as
colloid asphaltene and paraffin in the thickened oil is improved, and the fluidity of the thickened oil is improved; by adding the
lipopeptide surfactant, the
wetting capacity of the
system and
crude oil action is changed, an emulsification phenomenon is formed, the
microemulsion plug removal and injection
augmentation system and production injection water are injected at the same time, stratum
colloid,
wax and residual organic blockages of a stratum can be effectively dissolved through the
organic solvent,
butanol is adopted as a solubilizer, and the system has the advantages that the system is simple in structure and low in cost; the dispersion rate of the
organic solvent in the stratum can be effectively improved, the
dissolution rate of the system to organic blockages is improved, and the stratum is not damaged due to the excellent
environmental protection capability of the bio-based surfactant.