Application of layer system adjustment and well pattern optimization technology in Liugou Block
To improve the development effect of overlapping development block in multi-layer reservoir,Liugou Block was taken as the research area,considering the input-output ratio,wellbore life,and waterlogging rule,the timing of the superposed layer adjustment was analyzed,and the well pattern was optimized by numerical simula-tion.The results show that when the cost of the well was greater than the benefit,the average production life of the casing loss well was 12 years and the time of rapid flooding,the stratification of the study area was adjusted.The recovery efficiency of the study area was the highest when the reverse seven-point pattern adjustment was selected.Through the adjustment of well pattern,the corresponding rate of injection and production was significantly increased(21%),the degree of water driving was significantly increased(42.22%),the natural decline rate was significantly decreased(11.77%decreased to 6.58%),the final recovery rate was significantly increased(6.02%),and the technically recoverable reserves were significantly increased(85.75×104 t).The study provides theoretical guidance for the efficient development of Liugou Block and similar blocks.
multilayer reservoirLiugou Blockadjust the timingwell pattern optimization
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