Study on the development options of tight sandstone oil reservoirs and their influencing factors

The research area of tight sandstone oil reservoirs was selected, a numerical model the reservoir developed, and study development options influencing factors carried out to analyze influence different methods, physical engineering parameters on dynamics. Study shows that two main limiting efficient are properties formation energy. Fractured horizontal well injection huff puff can effectively improve timely replenish energy, which is suitable for such reservoirs. In dense reservoirs, its impact production capacity also relatively small when permeability ratio small. Due both gravity properties, increases, cumulative positive rhythm decreases reverse location high-quality in upper part producing wells conducive increasing final recovery rate. A lower water viscosity significantly increase swept volume effect. Hydrophilic reduce pressure spread range, improving problem inability inject, hydrophilicity through surface activators recovery. rate determines Generally, faster rate, higher production. Therefore, should be increased as much possible, taking into account construction conditions economic evaluation. Additionally, effect at stages, so appropriate timing very important effect, use early this not conducive. Soaking promote fluid redistribution but soaking long time lead contamination crude production, preferred about 20 days.