OPTIMISED HYDROCARBON MIXTURES AND METHODS OF USING OPTIMISED HYDROCARBON MIXTURES Russian patent published in 2010 - IPC E21B43/267 C09K8/68 C09K8/80 

FIELD: oil and gas industry.

SUBSTANCE: underground service fluid medium includes hydrocarbon mixture containing less than about 1 vol. % hydrocarbons having less than seven atoms of carbon (C₇); about 5 vol. % hydrocarbons having seven atoms of carbon (C₇); about 44 vol. % hydrocarbons having eight atoms of carbon (C₈); about 43 vol. % hydrocarbons having nine atoms of carbon (C₉); about 8 vol. % hydrocarbons having ten atoms of carbon (C₁₀); and less than about 1 vol. % hydrocarbons having more than ten atoms of carbon (C₁₀). Processing methods of underground fraction, hydraulic fracturing, arrangement of gravel packing by using the above hydrocarbon mixture.

EFFECT: obtaining safe service fluid medium with increased volatility allowing to increase the speed and completeness of extracting fluid medium from underground formation after the processing is completed.

43 cl, 1 tbl, 1 ex