Foamable composition for perforating the productive layers

 

The invention relates to the oil and gas industry, in particular, compositions for secondary opening heterogeneous permeability seal off formations perforation in the conditions of abnormally low formation pressure. The technical result is to increase the efficiency of the secondary reservoir perforation through the use of the resulting foam with high stability, superior blocking and decollimation properties, allowing to achieve a high hydrodynamic connection hole and the reservoir and which will preserve the integrity of the casing and cement sheath. Foamable composition for perforating productive strata, including the foaming agent based on an aqueous solution lignosulfonates reagent, acid reagent, potassium chloride or calcium and water, additionally contains a filler in the form of a mixture of shredded sprouts three-day barley and powdery lignosulfonates reagent selected from the group: technical lignosulphonate, condensed sulfite-alcohol bard, lignol, lignes, the ratio, by weight.h., equal to 1:2-4, respectively, as well as diesel fuel or gas condensate at the next to the PCI-e slot reagent 7-50, potassium chloride or calcium - 3-24, the specified mix - 1-5, diesel or gas condensate - 10-29, water - the rest, and as specified foam, it contains an aqueous solution lignosulfates reagent density 1130 kg/m3selected from the group: technical lignosulphonate, condensed sulfite-alcohol bard, lignol, Lignan, and as an acid reagent it contains an aqueous solution of 20% concentration of hydrochloric acid or sulfamic acid or a mixture of aqueous solutions of 20% concentration, selected from the group of hydrochloric acid and hydrofluoric acid, hydrochloric acid and potassium, or ammonium, or gidromantiya salt of hydrofluoric acid, hydrofluoric acid and sulfamic acid, sulfamic acid and potassium, or ammonium, or gidromantiya salt of hydrofluoric acid. 2 C.p. f-crystals.

Description text in facsimile form (see graphic part). Those

Claims

1. Foamable composition for perforating productive strata, including the foaming agent based on an aqueous solution lignosulfonates reagent, acid reagent, potassium chloride or calcium and water, characterized in that it googletoolbarno reagent, selected from the group: technical lignosulphonate, condensed sulfite-alcohol bard, lignol, lignes, the ratio, by weight.h., equal to 1:2-4, respectively, as well as diesel fuel or gas condensate in the following ratio of ingredients, wt.%: The specified foam - 4-20 Acid reagent - 7-50 potassium Chloride or calcium - 3-24 the Specified mix - 1-5 Diesel or gas condensate - 10-29 Water - other 2. Foamable composition under item 1, characterized in that, as specified foaming agent contains a reagent selected from the group: technical lignosulphonate, condensed sulfite-alcohol bard, lignol, lignes, in the form of an aqueous solution density 1130 kg/m3.

3. Foamable composition under item 1, characterized in that as the acid reagent it contains an aqueous solution of hydrochloric acid of 20% concentration, or an aqueous solution of 20% concentration of sulfamic acid, or a mixture of aqueous solutions of 20% concentration, selected from the group of hydrochloric acid and hydrofluoric acid, hydrochloric acid and potassium, or ammonium, or gidromantiya salt of hydrofluoric acid, hydrofluoric acid and sulfamic acid, sulfamic acid and potassium, or ammonium, and the

 

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