LOW-PERMEABLE OIL RESERVOIR DEVELOPMENT METHOD Russian patent published in 2008 - IPC E21B43/20 E21B43/26 

FIELD: petroleum industry.

SUBSTANCE: invention is referred to development of oil reservoir and can be applied in the oil/gas industry. Invention ensures higher efficiency of oil recovery from low permeable reservoirs by increasing rates of producing wells and recovery factors due to higher conductivity of inner and outer between filtration zones and pressure gradients between bottomholes of injecting and producing wells within the well pattern. The method includes injection of water to the reservoir via injecting wells by soaking reservoir rock matrix and opening pressure of natural fractures of the reservoir or development of intergranular fractures. The development direction of the abovestated fractures and water displacement front from injecting wells are controlled by periodical shutdowns of producing wells located in the direction of main trends of facture development and boosted recovery of producing wells located mainly in the directions normal to main trends of facture development. This ensures massive branched development of fractures in the reservoir used to displace oil from the reservoir to producing wells operated at drawdown that ensures bottomhole pressure in such wells being 5-15% higher than pressure of nonreversible deformation of rocks.

EFFECT: higher efficiency of oil recovery from low permeable reservoirs.

10 cl, 1 ex