METHOD FOR DEVELOPMENT OF LOW-PERMEABILITY OIL DEPOSIT Russian patent published in 2024 - IPC E21B43/00 

FIELD: oil, gas and coke-chemical industry.

SUBSTANCE: method for development of low-permeability oil deposit includes oil production with norm of fluid withdrawal from production well. Preliminary on production wells depth samples are taken; formation pressure, pressure of oil saturation with dissolved gas, content of dissolved gas and amount of released gas at differential degassing at each pressure stage are determined. Further, a linear graph of the dependence of the amount of released gas on the degassing pressure is plotted; the point of the fracture pressure value with a sharp increase in the release of dissolved gas is determined. After that, hydrodynamic investigations are performed in production wells, dynamic level of liquid and bottomhole pressure are determined. Production well is stopped with bottomhole pressure equal to or lower than oil saturation pressure with dissolved gas, liquid level recovery in the production well shaft is measured in real time, a liquid level recovery curve is plotted, the skin factor and productivity factor are determined. A production well with a skin factor less than zero is selected, the well flow rate is determined and brought into operation, oil production is carried out with a liquid withdrawal rate.

EFFECT: high efficiency of developing low-permeability reservoirs and maintaining high rates of extraction of oil reserves.

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