FIELD: oil production, particularly to clean bottomhole reservoir zone of mud and asphalt-tar-paraffin deposits.
SUBSTANCE: method involves injecting neutral carbonate and gas-generation initiator catalyst in bottomhole reservoir zone, wherein the neutral carbonate and gas-generation initiator catalyst react to create carbon dioxide; performing time delay and dropping pressure at well bottom. The gas-generation initiator catalyst is solvent containing monocarboxylic acids. The solvent is injected before neutral carbonate injection in reservoir. The solvent is vegetable oil with high monocarboxylic acid content. Before solvent injection high-permeable bottomhole reservoir zone intervals are isolated by serial injection of fresh controllable elastico-viscous composition and supporting system composition in reservoir. The supporting system composition comprises aqueous flocculant solution and clay powder.
EFFECT: increased efficiency due to extended reservoir treatment area and increased depth of deposit cleaning.
4 cl, 1 dwg
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