The Shallow Low Permeability Oilfield Air Foam Flooding And Its Application In The Tang80Well Area

Station of Gangu oilfield is a tight sandstone reservoir with extremely lowporosity and low permeability, typical, Gangu station in oil field water floodingdevelopment in the long-term, there has been a part of the oil wells and waterchanneling phenomenon, resulting in high water content, water injection, oilrecovery rate decreased etc.. Add in arid area, large-scale comprehensive oilfieldwaterflood development difficulties. In order to improve the development speed ofthe Tang and the80well area and enhance oil recovery, at the same time for thewhole oilfield supply energy, improve development speed and recovery experience,carry out air injection foam improve displacement efficiency test of oil in the Tangand80well area, explore new ways to improve the two oil recovery of lowpermeability oilfield.Through a lot of experiments, conducted a comprehensive adjustment of airfoam flooding technology research and in the test area were studied to understandand master the oxidation reaction occurs in low permeability reservoir air-foamflooding when the situation, according to the air component in displacement changesbefore and after, study the properties of crude oil oxidation, identified in thedifferent temperature, injection pressure, different pressure conditions and thedegree of air-oxygen reaction of foam flooding recovery, the results showed thatthe comprehensive adjustment of air foam flooding technology can effectivelybetween plugging wells hypertonic channel, effective wells with increasing liquid,precipitation, increased oil effect in different degrees, reflected in the test area ofgreat potential use of air foam flooding technology, provides certain reference forthe efficient development of similar reservoirs.