Study On The Limit Of Ultra-low Permeability Reservoir And The Establishment Of Driving System

Source 121-3 blocks under the condition of 350 x 100 m well pattern development effect is poor,unable to establish an effective drive system.In order to improve the block development effect,to explore the effective use of new means of dense zhaoyuan oilfield,20 million tons of reserves in zhaoyuan oilfield extra-low permeability reservoir source field test of the infilled adjustment of 121-3 blocks.Completed the research plan of this experiment content and physical workload,zhaoyuan oilfield geological understanding deepened,the research has been clear about the use of extra low permeability reservoir boundaries,formed a complete model of the infilled adjustment of low permeability reservoir;Determine the zhaoyuan encryption row spacing,economic row spacing,oil recoverable reserves,nissan upper limit and lower limit of effective thickness parameters;Infill well drilling built 20 mouth,focus the well mouth,the single well oil nissan 0.7 t,oil production rate remain at around 1.1%,showed that permeability of 1 md zhaoyuan oilfield in 175 m x 50 m under the condition of well pattern is to establish effective drive system.