Adjustment and Potential Tapping Technology at Mid or High Water Cut Stage of Low Permeability Reservoirs

Gasikule N1-N12 Oilfield is low permeability sandstone reservoir,it has been under development for more than 20 years.At present,it enteredin to mid or high water cut stage,adjustment and tapping the potential were difficulty.It has following characteristics:low nature energy;formation energy is difficult to be maintained;strong reservoir heterogeneity;serious interlayer interference and inefficient water injection.By studying the current status of exploitation of Reservoir by the approach of petroleum reservoir engineering and analyzing the main problems,the paper proposed a reasonable well pattern,adjustment injection system,to carry out old wells measures and other comprehensive adjustment strategy to improve development effect.It was proved that the practical effect is good and a guidance is provided for oilfield development.