METHOD FOR STIMULATING OIL PRODUCTION PROCESS Russian patent published in 2023 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: invention relates namely to the methods for intensifying the flow of oil, including from a dense or low-permeable oil formation, by changing the filtration and capacitance properties in the bottomhole zone of the formation using stimulating components. A method for stimulating the oil production process includes preliminary geophysical studies of the formation, injection of a binary mixture into the formation and subsequent injection of an activator through a production well, reaction of the components of the binary mixture with the activator in the formation with a temperature increase of at least 70°C and subsequent selection of products after technological aging. During geophysical studies of the formation, laboratory tests are carried out on the core obtained during drilling of the corresponding production well, and the content and composition of oil, porosity and permeability of the formation and hydraulic fracturing pressure are determined to increase the permeability of the formation. As a hydraulic fracturing fluid, a binary mixture with a dispersion of 10–25 wt.% of nanoparticles of metallic sodium is pumped under hydraulic fracturing pressure in an anhydrous organic medium in direct proportion to the viscosity of the oil. As an activator, mineralized water is pumped with a mineralization of 50–300 g/l and a mass of 10$$÷$$50 : 1 relative to sodium metal.

EFFECT: expanding the scope of application through the use of hydraulic fracturing for injection into a low-permeability formation with bituminous oil, in increasing the efficiency of the impact by eliminating the stratification of the binary mixture due to mixing the components of binary mixtures directly in the formation, as well as in simplifying the implementation of the method through the use of non-aggressive reagents for humans and environment.

2 cl, 1 dwg