PROCESS OF TREATMENT OF FACE ZONE OF POOL Russian patent published in 2002 - IPC

FIELD: oil industry. SUBSTANCE: process can be used for increase of filtration properties of face zone of pool and of productivity of oil production wells and for repair of wells. It can also be used in production, transportation and storage of oil. Technical result of process consists in raised efficiency of treatment of face zone, in provision for treatment of face zone of deep wells, in stable productivity of wells for maximum long period without restoration of blockade of face zone of pool. Process of treatment of face zone of well is realized by pumping mixture of dichlormethane and aromatic hydrocarbon in following proportion, mas.%: dichlormethane, 30-70; aromatic hydrocarbon, 30-70. Specified mixture is pumped in portions, first portion is supplemented with demulsifier. Block-copolymers based on ethylene and propylene are utilized in the capacity of demulsifier, toluene, ethyl benzene fraction, concentrates of aromatic hydrocarbons C₉- C₁₀, xylene are used as aromatic hydrocarbon. EFFECT: raised efficiency o treatment of face zone of pool. 2 cl, 3 tbl