METHOD FOR ACTING ON A BOTTOM-HOLE ZONE

The invention relates to the oil industry and can be used for performing an action on a bottom-hole zone with the view to increasing the well production performance. The inventive method for producing an action on a bottom-hole zone consists in carrying out impact action on a bottom by means of a falling weight, in simultaneously pumping a fluid in the well, in lifting the weight with the aid of a plunger by using the hydraulic energy of the fluid flow pumped into the well, in producing, after each weight drop, an additional impact action on the bottom by the plunged falling through the weight, simultaneously with the impacts produced by theweight and the piston on the well bottom, in treating the bottom hole zone, by means of a hydraulic pressure pulses and in pumping chemical reagents into the bottom-hole zone, thereby increasing the production efficiency thereof. The other variant of the method consists, after pumping the solution of chemical reagents into the bottom-hole zone, in flowing the fluid in the well, in simultaneously producing impacts on the well bottom by the weight and the piston and in carrying out an action on the bottom-hole zone by hydraulic pressure pulses during the whole period of reaction in the bottom-hole zone. The two variant of the method also consist, the reaction in the bottom-hole zone being over, in developing the well by substituting the fluid flowing in the well with a less-density medium, in simultaneously producing impacts on the well bottom by means of the weight and the piston, in acting on the bottom-hole zone with hydraulic pressure pulses and in developing the well by means of an aerated fluid. La présente invention relève de l'industrie pétrolière et peut servir à stimuler une zone de fond de puits de façon à augmenter le rendement d'un forage. L'invention concerne un procédé de stimulation d'une zone de fond de puits, qui consiste : à appliquer des impacts sur le fond d'un puits à l'aide d'une masse tombante, tout en pompant un liquide dans le puits et en levant la masse au moyen d'un piston grâce à l'utilisation de l'énergie hydraulique de l'écoulement de liquide pompé dans le puits, un impact supplémentaire étant appliqué sur le fond, après chaque impact de la masse, au moyen du piston tombant à travers la masse. Afin d'améliorer l'efficacité, le procédé selon l'invention consiste, simultanément à l'application d'impacts à l'aide de la masse et du piston sur le fond du puits, à traiter la zone de fond de puits