| abstract |
A kind of hypertonic duct type oil reservoir chromium aluminium ion compounding profile control agent and its application method, are related to field use chemical field.Profile control agent of the present invention is injected in hypertonic duct type oil reservoir by double slug forms, and preposed attributives mix multiple high polymer polyacrylamides and additive formation Complex polymer, and oil reservoir middle and high infiltration area, macropore are implemented to block；Rearmounted slug mixes multiple low molecular weight polyacrylamides and additive, possess that low viscosity, mobility be strong, shear resistant feature, injection oil reservoir carries out transfer drive after preposed attributives closure, water drive is produced after closure small-scale water breakthrough, fingering phenomenon can be suppressed, contain proper amount of surfactant in profile control agent, the hydrophily of reservoir rockses can be improved, suppress the phenomenon that the unmanageable wax of traditional profile control method, colloid, asphalitine are deposited near wellbore zone；Profile control agent compounding method of the present invention is simple, is suitable for salinity 500mg/L 35000mg/L preparation water, and raw material is cheap and easy to get. |