METHOD TO APPLY ACTION TO WELL ENVIRONMENT OF PRODUCTIVE RESERVOIR Russian patent published in 2006 - IPC E21B43/32 

FIELD: treatment of well drilled in productive reservoir, which is at later operation stage.

SUBSTANCE: method involves injecting polymeric compositions in reservoir; lowering hydroacoustic generator in well; applying hydroacoustic waves to polymeric compositions and to flushed reservoir interval; preparing inflow stimulation and stimulating well inflow. Polymeric compositions or solid dispersed filler in hydrocarbon liquid are injected in productive formation. Hydroacoustic generator is connected to flow string to be lowered in perforation zone. Polymeric composition or dispersed filler mixed with hydrocarbon liquid treatment is carried out when above materials are delivered to perforation interval and during injection thereof in reservoir. Before inflow stimulation hydroacoustic generator is installed in productive non-worked out reservoir interval and the interval is cleaned by applying hydroacoustic action to it. To apply above hydroacoustic action spectrum of acoustic wave with 0.2-16 kHz frequency and 1.5-6.0 MPa amplitude is generated. Then one spectrum frequency resonance is provided, wherein frequency is equal to that of self-oscillation of particles, which clog productive reservoir cracks and pores during primary opening thereof. Pressure drawdown is simultaneously created in well. Inflow stimulation and well development is carried out with the use of downhole vortex pump.

EFFECT: increased production well output along with water influx restriction, improved isolation quality and reduced repair costs.