USE OF IONIZED FLUID DURING HYDRAULIC FRACTURING OF FORMATION Russian patent published in 2018 - IPC E21B43/25 C09K8/60 

FIELD: oil and gas industry.

SUBSTANCE: method includes: introducing a fluid containing positively charged ions into at least some of the fractures; provision of said ions to convert shales along cracks into aragonite crystals so that some of the aragonite crystals become suspended in the fluid; removing some of the fluid with the weighted aragonite crystals from said formation. Removal of the aragonite crystals opens or expands the fractures and increases the permeability of the formation by increasing the amount and production rate of hydrocarbons from said formation. The fluid remaining in the mass continues to convert the following calcite crystals along cracks into aragonite crystals, so that aragonite becomes more weighted in the fluid, a certain amount of the weighted aragonite fluid is removed from said formation, thereby further increasing or maintaining the permeability of said formation.

EFFECT: increased hydrocarbon production efficiency.

11 cl, 39 dwg