METHOD FOR PRODUCTION OF OIL WITH HELP OF ELASTIC VIBRATION ENERGY AND FACILITY FOR ITS IMPLEMENTATION Russian patent published in 2010 - IPC E21B43/16 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to production of oil, in particular - to production of oil with the help of elastic vibrations. The method involves placement of a downhole apparatus in the well at an operational depth which apparatus is connected to a ground-based power supply source of an industrial frequency and contains an ultrasonic transducer that provides for generation of high frequency elastic vibration, excitation of varied frequency elastic vibrations and subsequent recurrent impact of varied frequency elastic vibrations onto the oil reservoir. The impact is performed by high and/or low frequency vibrations. For generation of high and low frequency elastic vibrations two independent vibration sources are used. One of them is represented by at least a single radiating ultrasonic, mainly - magnetostrictional transducer while the second one is made as based on an electropulse device that provides for generation of low frequency elastic vibrations and is connected to the ground-based power supply source of an industrial frequency and includes, electrically interconnected, a charger, a unit of reservoir capacitors, a discharge unit equipped with electrodes and two switching devices with one of them providing for composition of individual reservoir capacitors to form a unified unit while the second performs switchover of the reservoir capacitors from one type of electrical connection to another connection type. High frequency elastic vibrations impact proceeds in the low frequency ultrasonic range, mainly - at a frequency of 18-44 kHz and in the constant and/or impulse mode with an intensity within the range of 1-5 W/cm². Low frequency elastic vibrations impact proceeds at a discharge pulse repetition rate equal to 0.2-0.01 Hz and a discharge unit pulse energy equal to 100-800 joule. Supplied to the charger from the power supply source is a direct voltage whose value is set within the range of 300-150 V. Before reservoir capacitors unit charge one performs their composition to form a unified unit; the reservoir capacitors charging proceeds mainly with the capacitors connected in parallel and mainly during 20 sec till the required voltage value, the maximum threshold thereof assumed to be 20-27 kV. Before discharge of the reservoir capacitors unit providing for supply of its output voltage to the discharge unit electrodes all the reservoir capacitors or a part thereof are switched over to cascade electrical connection. At the same time high frequency elastic vibration impact proceeds under varying electrical and acoustic characteristics of the ground-based and/or downhole equipment and technological parameters of the oil production process.

EFFECT: improved efficiency due to an impact on the stratum being treated with performance of successive and/or alternating treatment of the hole-bottom zone and the active well zone with high and low frequency elastic vibrations.

31 cl, 7 dwg