Selective Water Plugging Technology for Horizontal Well with Screen Completion

The SD107 gel system developed has good oil–water phase selective gelation and blocking properties. static gel-forming experiment results showed that the water shutoff formulated with oilfield reinjection (oil content < 0.05%) a viscosity of 200 mPa·s after gelation, plugging produced fluid ? 20.0%) had 26 gelation. Results core physical simulation indicated enhanced recovery rate was highest (34.6%) when resistance ratio high-low permeability about 10.0 plugging. As per volume (Q) oil well to be blocked, maximum production pressure difference (?P) predicted, on basis economic output, section, high cut outlet section used calculate depth (re1, limit radius), which offers for design process parameters horizontal wells. field test using this technology, daily increased from 4 t/d 20 t/d, increase 16 decreased 75% 25%. water-blocking construction success.