COLOURED ORGANIC PEROXIDE-BASED COMPOSITIONS AND METHODS FOR FLUID LIQUEFACTION FOR HYDRAULIC FRACTURING Russian patent published in 2020 - IPC C09K8/90 E21B43/267 

FIELD: oil, gas and coke-chemical industries.

SUBSTANCE: invention relates to coloured liquefied compositions and use thereof for developing subterranean formations during oil and gas production. Painted fluidising composition for use in a water-based treatment fluid comprising at least one organic peroxide, at least one organic dye free of metal selected from a group comprising FD&C - Blue No. 1, FD&C Red No. 3, FD&C Red No. 40, FD&C Yellow No. 6, Purple Shade, Grape Shade, Blue Liquid, Purple Liquid and combinations thereof, and at least one alcohol selected from a group comprising polyatomic alcohols, glycols, butyl alcohols, triols, monosaccharides, disaccharides and combinations thereof. Water-based fluid for treatment of a formation containing water, at least one gel-forming agent, at least one cross-linking agent and the above coloured fluidising composition. Method for reducing the time of liquefaction of a water-based fluid for treating a formation, comprising combining said coloured fluidising composition with a water-based fluid for treatment of the formation. Method of fracturing a subterranean formation, comprising injecting into a subterranean formation in fracturing conditions of a water-based fluid for treating a formation, said coloured fluidising composition and, optionally, a promoter composition, wherein the water-based fluid for treatment of the formation contains a gelling agent and a cross-linking agent, and optionally a promoter composition contains at least one promoter and at least one dye.

EFFECT: improving liquefaction efficiency during formation treatment.

14 cl, 21 dwg, 8 ex