All known oil production technologies do not allow to extract more 40-60% of oil reserves.
Enhance Oil wells Recovery (EOR) with environmentally friendly (sand and water are used) Slotting Perforation Technology (SPT) allows to extract additional 40-50% of non-recoverable oil reserves.
Dry and low-productive oil wells (0-1 bbl./day) after SPT began to give 25, 30, 50 and 70 bbl./day. Statistical duration of the effect is 10-15 years and more.