METHOD OF SHORT-TERM HYDRODYNAMIC ANALYSIS OF HORIZONTAL WELLS AND WELLS WITH FORMATION HYDRAULIC FRACTURING AT UNSTEADY FILTRATION MODE Russian patent published in 2020 - IPC E21B47/10 G06G7/48 

FIELD: mining.

SUBSTANCE: invention can be used in interpreting data of hydrodynamic investigations of oil horizontal wells or wells with hydraulic fracturing of formation at deposits with low filtration-reservoir properties both due to low collector permeability, and due to high viscosity of oil. According to the method, determination of permeability of the analysed formation is carried out in the early elliptic filtration mode around the linear runoff by graphically solving the system of equations for each moment of detecting pressure change during the analysis, using relationships between filtration and capacitance properties around linear flow. Determination of permeability is carried out simultaneously with determination of effective length of linear flow of horizontal well or fracture of hydraulic fracturing of formation. Interpretation of data is carried out by iterative selection of formation permeability, at which constant value of linear flow in time will be achieved using known connection of filtration and reservoir properties of formation at specified value of skin-factor for contamination. If it is impossible to select such permeability value, it is required to select the connection between filtration and reservoir properties of the formation for another value of skin-factor for contamination.

EFFECT: shorter time for hydrodynamic analysis of oil horizontal wells and wells with hydraulic fracturing of the formation by an order under conditions of low filtration properties from one year and more to several weeks.

1 cl, 3 dwg