METHOD FOR OIL DEPOSIT DEVELOPMENT BASED ON SYSTEM ADDRESS ACTION Russian patent published in 2014 - IPC E21B43/16 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil and gas industry and can be used for development of oil deposits at late stage characterised by heterogeneous reservoirs of different origin and, in particular, by zonal heterogeneous reservoirs with formations having different permeability or fractured-porous type reservoirs. The concept of the invention is as follows: the method includes cyclic instable injection of the agent through injection wells, extraction of fluids through producing wells, additional targeted impact by chemical reagents to the formations through the total number of injection and producing wells with identification of sections having different geological and physical properties, current state of development and degree of reserves recovery. According to the method a testing field is selected for which its average permeability is determined with use of core material and weighted average values of flow capacity, piezoconductivity are calculated for the formation at this testing field; penetration test is made with determination of oil displacement, stimulating or isolating properties for used chemical reagents. Duration of the agent injection within borders of the testing field is determined with use of analytic expression considering a distance from the injection front up to fluid extraction point; average piezoconductivity of the formation, its permeability, porosity and elastic ratio for the rock and fluid are also determined. Targeted duration of the agent injection is determined for each area and algorithm for further development of the selected areas is defined on the basis of laboratory feasibility study and results of hydrodynamic simulation of impact technologies for specific selected areas. Then system-address action is carried out at each area.

EFFECT: increasing reservoir recovery and reducing volume of associated water, reducing costs for implementation of the method, improving efficiency of the development as a whole and intensification of the development process.

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