METHOD OF TREATMENT OF BOTTOM-HOLE FORMATION ZONE Russian patent published in 2001 - IPC

FIELD: oil producing industry, more specifically, methods of treatment of bottom-hole formation zones with use of bottom-hole devices of impact-wave and implosive action. SUBSTANCE: method includes lowering into well of implosive device and its location within interval of treated formation; preliminary injection to bottom-hole zone of treating composition; subsequent forcing of treating composition into formation; cleaning of bottom-hole zone with multiple implosive action. Before and after treatment of bottom-hole formation zone, dynamic level in casing-wellbore annular space is determined in process of hydrodynamic researches. After forcing of treating composition into formation, it is left to stay in formation. Multiple implosive action is performed with building up of differential pressure on bottom hole by reducing pressure to values less than formation pressure value by method of reduction of fluid level in casing-wellbore annular space. Multiple implosive action is carried out up to stabilization of dynamic level in casing- wellbore annular space. EFFECT: higher efficiency of cleaning of bottom-hole formation zone to provide for proportional increase of well productivity, bringing of wells out of shutdown and attaining of profitability of well operation. 2 tbl, 1 ex