| 摘要 |
FIELD: oil and gas production. SUBSTANCE: into perforated zone, fluid is pumped in containing methanol, phosphonic acid, a surfactant, and water followed by holding fluid in the zone when draining well and then removing fluid from stratum. Thereafter second process fluid is pumped in containing methanol, sodium orthophosphate, surfactant, and water or, depending on type of deposits, the same fluid supplemented with hydrochloric acid. EFFECT: reduced permeability of collector to almost its original value. |
