METHOD FOR DEVELOPING PETROLEUM DEPOSITS Russian patent published in 2021 - IPC E21B43/267 E21B7/04 C09K8/70 

FIELD: petroleum industry.

SUBSTANCE: invention relates to the mining industry and can be used in development of natural and man-made petroleum mineral deposits with hard-to-recover hydrocarbons. The method for developing petroleum formation includes opening a productive formation with a system of vertical injection boreholes and horizontal injection boreholes, wherein an agent displacing petroleum from the formation is supplied through said boreholes under pressure, containing components providing hydraulic fracturing of the productive formation considering the temperature-pressure conditions of the vertical injection boreholes and the horizontal injection boreholes. To increase the efficiency of the production process at the first preparation stage, a three-phase mixture is supplied under high pressure into the productive formation as an agent, consisting of a water-gas emulsion prepared in an anode chamber of an electrochemical reactor with the addition of a reagent increasing the pH of the water-gas emulsion to a level of 9 to 11, and a sand-gravel material with a fraction of no more than 4 to 7 mm depending on the content of the sand mass relative to the gravel and on the content of solid to liquid in the water-gas emulsion prepared in the anode chamber, to ensure hydraulic fracturing of the productive formation, to weaken the bond of heavy petroleum fractions with mineral particles by oxygen contained in the anolyte and to form a mobile water-gas-petroleum intraformational emulsion. A water-gas emulsion from the cathode chamber used to transfer heavy petroleum fractions to the main operating area of the pumping boreholes due to the adhesion of oil microdroplets with electrolytic hydrogen bubbles and to increase the total petroleum recovery of the productive formation is therein supplied to the lower part of the productive formation. The supply rate and flow rate of the water-gas emulsions are therein made considering the temperature-pressure conditions of the vertical injection boreholes and the horizontal injection boreholes and the effect of initiation of cavitation during inversion modulation of water-gas emulsions from irregularly shaped holes.

EFFECT: increase in the technological and operational efficiency of the hydrocarbon production process due to initiation of hydraulic fracturing by activation components and formation of cavitation hydrodynamic effects for increasing the permeability of the formation.

1 cl, 2 dwg