Study On Control And Oil Displacement About A New Type Of Small Molecule Materials That Drive Control System Of The Temperature And Salt For Low Permeability Fractured Reservoir

After a long period of waterflooding development in low permeability fractured reservoir,that makes the formation pore, fracture and the micro cracks original state closed opening,formation heterogeneity is strengthened, the injected water along fractures and highpermeability direction inroads, causing anhydrous harvest period short early watered-out oilWells, etc. To solve this problem, researching a novel small molecule materials adjusting drivesystem that is going to improve the oil reservoir development characteristics. The system hasthe viscosity of the base fluid in the surface conditions, rapidly injected into the formation togenerate precipitation, clogged large pores. That is able to subsequent injection water lfowaround, driving on behalf of the remaining oil in the reservoir which was not spread to the lowpermeability zone, extend the service life of oil Wells, and increasing ultimate recovery.This study in the laboratory test has researching and performance evaluation rfom thefollowing aspects: selected the small molecular material control and flooding agentformulations screening, temperature resistance, salt tolerance, and thermal stability etc. Thefinal optimized small molecule materials control and flooding agent concentrationformulations, as well as small molecule mateirals control and flooding agent suitable for usingin high-temperature, high-salt low permeability fractured reservoirs; The plugging rateexperiments and flooding experiment of the core indoor fully proved that such control andflooding agent with strong blocking performance and flooding capacity, providing a realisticbasis for on-site pilot experiment. Therefore, a novel small molecule material control and oildisplacement system in low permeability fractured reservoirs proifle control water pluggingvery broad prospects.