METHOD OF HYDRAULIC FRACTURING AND FIXATION OF FORMATIONS Russian patent published in 2021 - IPC E21B43/26 C09K8/66 

FIELD: mining.

SUBSTANCE: invention relates to mining industry and can be used for recovery of flow rates and ensuring stable operation of production wells by means of hydraulic fracturing (HF) and fixing rocks of reservoirs. In the method of hydraulic fracturing and fastening of formations, a fracturing fluid is prepared containing an aqueous solution of medium-module liquid glass of the following composition, wt. %: sodium silicate - 17–20 and an acetone-alcohol solution consisting of anhydrous acetone and methyl alcohol in volume ratio of 0.4:1, with the following ratio of components, wt. %: said liquid glass solution - 75–85 and said acetone-alcohol solution - 15–25, it is pumped into formation in 30–40 minutes after preparation. When hydraulic fracturing is achieved for attachment of collector rocks to fracturing fluid, proppant is introduced in amount of 100–150 kg per 1 m³ of liquid and pumping solution fixer - water-alcohol solution of calcium chloride, containing alumomethylsiliconate sodium, with following ratio of components, wt. %: calcium chloride - 15.0–17.0; ethyl alcohol - 24.5–44.5; sodium aluminomethyl siliconate - 0.1–0.7, water is the balance.

EFFECT: technical result is ensuring productivity and stable operation of wells after hydraulic fracturing by increasing efficiency of mounting reservoir productive horizon rocks by maintaining permeability of rocks and reducing influx of formation water.

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