PROCESS OF GAS-IMPULSIVE TREATMENT OF GAS AND OIL WELLS AND DEVICE FOR IMPLEMENTATION OF PROCESS Russian patent published in 2008 - IPC E21B43/16 

FIELD: mining.

SUBSTANCE: process involves downtake of gas-filled tool with gas exhaust in the productive strata area, with frequency and period of exhaust controlled from the surface in accordance with the resonance properties of the developed area of productive stratum. Geodynamic zonation of well or well group site is conducted and collector capacity is determined preliminarily. Geometrical dimensions of V range tectonic blocks, on which the wells are located, are defined; it means blocks within 200 to 500 meter range. Next, fracture and bed thickness category of the collector stratum and average size of microblocks is defined. At that, gas-impulsive treatment of productive stratum is implemented simultaneously in the whole collector range by pulse vibration with frequency within the resonance frequency range corresponding to the parameters of the blocks. Gas-impulsive oscillator is used as a gas-filled tool, and gas is generated by it directly in the well, while heated flue gas is passed through gas-impulsive oscillator with intensity under 10-6 W/m². The device includes hollow case suspended by load-bearing logging cable, and current lead connected to the power source and made in the form of insulated cable connector. According to the invention, the device case features removable upper and bottom caps. A heater is installed in the case and connected by the current lead to the logging cable. Gas-generation fuel cell is lodged in the upper cavity of the case, connected by gas-conduction holes to reducer controlling outlet gas pressure. Seismoacoustic oscillator in the form of perforated cylinder with adjustable frequency of rotating valve gate at the reducer outlet is installed in the bottom part of the case and connected to the reducer by gas-conduction channel.

EFFECT: improved efficiency of hydrocarbon fluid recovery and lower bottom hole pressure in a well due to the complex effect of productive strata collector on the rock by accounting for the stratum fracture and block structure.

13 cl, 2 dwg