METHOD FOR FORECASTING WELL PRODUCTIVITY

摘要

The invention relates to a method for predicting the productivity of producing wells to optimize bottomhole pressures. To improve the reliability and accuracy of forecasting in conditions of heterogeneous permeability of deposits, a method is proposed in which the permeability of the feed circuit zone is determined, for which laboratory studies of the dependence of gas saturation on pressure and relative permeability of carbonated oil on gas saturation are carried out, the obtained curves are approximated and the dependence of relative permeability of carbonated oil is obtained pressure: where k is the relative permeability of the oil, the liquid flow rate is determined at the bottomhole pressure equal to the gas saturation pressure of the gas, according to the Dupuis formula, and at the bottomhole pressure below the saturation pressure, taking into account the permeability of the heterogeneous reservoir in the zone of the supply circuit according to the applicant’s formula. Additionally, the following formula is used to estimate the predicted production rate: where K is the well productivity coefficient at P = P, where P is the oil saturation pressure with gas, P and P are the reservoir and bottomhole pressures, respectively, and for Uzensky field = 3.6.