THERMAL GAS CHEMICAL COMPOSITION AND ITS APPLICATION FOR WELL BOTTOM AND REMOTE ZONES OF PRODUCTIVE STRATUM Russian patent published in 2014 - IPC E21B43/24 C09K8/592 

FIELD: oil-and-gas industry.

SUBSTANCE: proposed composition is produced by sequential injection of combustible oxidative composition of COC and reaction initiator. Binary stable COC comprises the following components ion wt %: ammonium nitrate - 15-50, sodium nitrite - 15-40, stabiliser - 0-2, emulsifier - 0.1-2, oil - 10-25, water making the rest. Reaction initiator for binary COC represents a 15-37% solution on inorganic acid. Reaction initiator for binary COC comprises the following elements in wt %: ammonium nitrite - 15-50, sodium nitrite - 15-40, stabiliser - 0-2, thickener - 0.1-0.5, water making the rest. Reaction initiator for BSV represents a 15-100% solution or emulsion of organic acid in hydrocarbon medium. Proposed method comprises injection of COC, injection of buffer fluid, injection of reaction initiator corresponding to injected COC and injection of squeezing fluid.

EFFECT: higher efficiency and safety.

4 cl, 2 tbl, 2 ex, 2 dwg