DEVICE AND METHOD OF THERMO-GAS-HYDRO-DEPRESSION WAVE FRACTURING OF PRODUCTIVE FORMATIONS FOR DEVELOPMENT OF HARD-TO-RECOVER RESERVES (VERSIONS) Russian patent published in 2016 - IPC E21B43/248 E21B43/263 E21B43/18 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions relates to oil and gas and mining industry and, in particular, to intensification of oil and gas wells and degassing of coal beds. Device includes a logging cable with a cable head and consists of remote control unit with gamma-sensor, an instrument head, adapter, gas-generating charge case and independent registration unit. Gas-generating charge is characterised by high-energy solid-fuel composition of the gas type. It is made up of one-piece blocks in a combination with grains tubular type with more intensive gas formation diameter 36…85 mm in length 200…1,500 mm with internal axial channel diameter 5…28 mm and an electric igniter. Said charge is arranged in case of steel oil pipes, titanium alloys or composite materials with diameter 102 mm with wall thickness 6.5…10 mm and channels for gas outlet area to 70 % of the cylindrical surface of the housing. Such design of charge provides during its combustion rate of increase of pressure in the well is more than 100 Mpa/s to achieve pressure pulse in 3-5 times higher than hydrostatic that provides creation of a single processing zonal branched layering of productive formation cracks in radius to 5-7 m and more. Recording of pressure and temperature dynamics independent digital devices in real time with discreteness 8.0…10.0 thousand measurements per second. To increase stability and gas generator advance emergency in well with zenith angle to 90° and more, a geophysical cable multilayer structure with diameter 8…28 mm with breaking strength 60…250 kN.

EFFECT: technical result is higher efficiency and reliability.

6 cl, 3 dwg