METHOD FOR TREATING DOWN-HOLE ZONE OF BED Russian patent published in 1997 - IPC

FIELD: oil production industry. SUBSTANCE: this can be used in intensifying oil production and increasing oil output in difficult conditions of developing deposits and particularly in treating down-hole zones of vertical, incline and incline-horizontal wells and also wells with second hole. According to method, elastic vibrations are applied to create channels or fissures in down-hole zone. Determined are depths, opening and number of created or existing fissures or channels in down-hole zone having hydraulic connection with well. Well liquid is investigated and its density and compressibility are determined. Elastic vibrations are applied in interval of perforations at resonance frequency calculated according to summary of aforesaid parameters depending on packer location depth, well diameter and its depth. Application of this method increases depth of wave penetration into oil bed being treated due to extended effective radius of source. Efficiency of treatment is enhanced due to improved spacious and power distribution of elastic vibration field in oil bed and also due to improved vibration characteristics of down-hole zone connected with new character of radiation of vibration energy that is creation of resonance intensive pulsing of flow rate in passages or fissures. EFFECT: high efficiency.