Fracturing treatment technique of low production and low efficiency blocks in Hailaer oilfield

The fault block reservoirs in Hailaer oilfield are characterized by complex geological conditions and strong heterogeneity.In order to improve the development effect of low production and low efficiency blocks by the integration method of fracturing engineering and reservoir geology,the detailed interpretation of rock mechanics parameters of complex lithologic reservoirs was carried out in depth.The asymmetric full-length artificial fracture simulation technology was adopted,combined with the advantages of water flow,an effective displacement system was established,the branch fracturing parameters were optimized and the overal effective production of the oilfield was achieved.Over the past few years,161 wells have been applied on site in 12 blocks,and the total production has been increased by 18.05×10~4 t in oil wells,the total injection o water has increased by 70.9×10~4m~3,the control degree of water driving has increased by 18.5%,and the effectiveness is obvious.