METHOD OF TREATMENT OF WELL BOTTOMHOLE ZONE WITH LOW BED PRESSURE Russian patent published in 2008 - IPC E21B43/25 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to mining and can be used for development and rejuvenation of producing wells yield, reduced as a result of mudding of a bottomhole zone with asphalt-tar-paraffin formations and mechanical additives. The method of treatment of a bottomhole of a well with a low bed pressure includes formation of a depressive pressure drop between the bottomhole zone and a reservoir of the well. Fluid is pumped into the well reservoir up to a process acceptable pressure. A shock wave, traveling in the well reservoir, creates recurrent pressure impulses in the bottomhole zone; the said wave occurs with alternate opening of the well reservoir at the mouth of the well for well fluid under pressure flowing out, and with its closing by means of valves. One of these - the fluid discharge valve - connects the well reservoir with a discharge reservoir; the second - the fluid refill valve - connects the well reservoir with the fluid source under pressure. The discharge reservoir is connected with a pump compressor pipe through the fluid discharge valve. The fluid source under pressure is connected with the annular space via the fluid refill valve. Pumping of fluid into the well up to a process acceptable level is performed through the annular space within time intervals between operations for creating the shock wave transfer in the well reservoir. The technical result is avoiding of mudding sediments penetration into the bed at rising of well pressure, required for creating the shock wave traveling in the well reservoir.

EFFECT: efficient method of treatment of a well bottomhole zone with low bed pressure by means of avoiding of mudding sediments penetration into the bed at rise of well pressure.