METHOD FOR DETERMINATION OF PRODUCTION WELL LOCATIONS WHEN DESIGNING THE DEVELOPMENT OF HIGH-VISCOSITY OIL FIELDS Russian patent published in 2023 - IPC E21B49/00 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry, namely to the determination of the initial data for the design of the development of a productive deposit containing high-viscosity oil with nonlinear viscoplastic properties. It can be used for optimal placement of production wells in the design of the development of high-viscosity oil fields. The technical result is to increase the accuracy of determining the oil inflow to vertical production wells, taking into account their interference and the influence of non-linear viscoplastic properties of oil, as well as determining the optimal placement of production wells. The method includes obtaining data on the geological and physical characteristics of the formation, the physical and rheological properties of oil, the results of field and hydrodynamic studies of wells in a steady state, including pairs of drawdown and well production rates for oil; determination of the filtration parameters of the "reservoir-oil" system by modeling the processes of filtration of non-linear viscoplastic oil based on the data obtained with the determination of its inflow. The filtration model for non-linear viscous-plastic oil takes into account the interference of neighboring production wells, the supply contours of which intersect in an arbitrary way. Pseudo-steady flow of oil is determined to the bottoms of vertical production wells located anywhere in the drainage area of an arbitrary shape. At the same time, the wells are located in such a way as to minimize the area of stagnant zones, which are characterized by the most likely manifestation of the structural and mechanical properties of non-linear viscoplastic oil.

EFFECT: increase in the accuracy of determining the oil inflow to vertical production wells.

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