METHOD FOR TREATMENT OF FACE-ADJACENT WELL SECTION Russian patent published in 2004 - IPC

FIELD: oil extractive industry.

SUBSTANCE: method includes feeding of composition of hydrocarbon dissolvent and surfactant and technological mixture into face-adjacent section. As said composition, solution of surfactant Rekod-758 in hydrocarbon dissolvent - cubic remains of ethylbenzene rectification or solution of surfactant - neonol AF_9-12 in hydrocarbon dissolvent - mixture of side products of production of synthetic rubber monomers is used, additionally, before feeding, distillate is injected into said composition. Treatment is performed in two stages, first, first composition is fed with following ratio of component in percents of weight: said dissolvent - 4.0-8.0, said surfactant - 0.25-0.6, distillate is the rest, technological aging of mixture for 1-3 hours is performed, then second composition is fed with following ration of components in percents of weight: said dissolvent - 40.0 - 60.0 percents, said surfactant - 0.25-0.6, distillate is the rest, and technological aging of mixture for 20-24 hours is performed.

EFFECT: higher effectiveness of cleaning of face-adjacent bed pores in the well from asphalt-resin-paraffin substances, and as a result, higher productiveness of well due to practically complete dissolution and removal of asphalt-resin-paraffin deposits from face-adjacent well section.

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