GAS GENERATING FOAM COMPOUND FOR TREATMENT OF BOTTOMHOLE ZONE OF FORMATION (VERSIONS) Russian patent published in 2009 - IPC C09K8/38 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil and gas industry, particularly to foam acid treatment of bottomhole zone of formation. The gas generating foam compound for formation bottomhole zone treatment contains, wt %: surface active substance SAS or mixture of SAS 0.1-3.0; water soluble polymer 0.1-5.0; dry organic acid 3.75- 20.0; nitrite of alkaline or earth metal 6.20-45.7; sal ammonia 4.79-35.4; high dispersive hydrophobic material 0.1-3.0; complexon 0.5-3.0; hydroxide of alkali metal 0.5-10.0; water - the rest. Gas generating dry acid foam compound for treatment of formation bottomhole zone contains wt %: SAS or SAS mixture 0.1-3.0; water soluble polymer 0.1-5.0; dry organic acid 3.75- 20.0; nitrite of alkaline or earth metal 6.20-45.7; sal ammonia 4.79-35.4; high dispersive hydrophobic material 0.1-3.0; complexon 0.5-3.0; hydroxide of alkali metal 0.5-10.0; weighting additive - the rest. The invention is disclosed in dependent patent claims.

EFFECT: increased efficiency of acid treatment of collectors due to improved flow characteristics of a compound, also due to reduction of rate of acid compound reaction with rock and to reduction of corrosion activity of the acid compound, due to raised efficiency of collector cleaning from mud solid particles owing to their flocculation; due to decreased rate of poorly soluble salts sedimentation and due to increased solubility of salt sediments on treated surfaces of collectors, due to washing properties of compound and hydrophobisation of collectors and also to improved oil-sweeping properties of the compound.

6 cl, 6 tbl, 5 ex