INVESTIGATION OF OPERATION OF A LOW VOLTAGE SHOCK GENERATOR IN AN ELECTROHYDRAULIC DEVICE FOR SEISMIC EXPLORATION AT SMALL DEPTH

• Main Authors: Sergey V. Pustynnikov, Gennady V. Nosov, Wei Han, Mariya G. Nosova
• Format: Article
• Language: Russian
• Published: Tomsk Polytechnic University 2019-04-01
• Series: Известия Томского политехнического университета: Инжиниринг георесурсов
• Subjects: shock generator; electrohydraulic source; moving electrodes; mathematical model; oscillogram; seismic survey
• Online Access: http://izvestiya.tpu.ru/archive/article/view/195/115

The relevance of the study is caused by the need to develop new sources of powerful current pulses for operation in an electrohydraulic device with moving electrodes that can be used to excite seismic waves in non-explosive seismic surveys. The aim of the research is to carry out computational and experimental studies of operation of a low-voltage shock generator on an arc in water, initiated by moving electrodes in the mode of single pulses and in production of a series of pressure pulses. Optimization of the parameters of the shock generator and the electrohydraulic radiator, in order to obtain the maximum pressure pulse. Objects: low-voltage shock generator, made in the dimensions of the crane asynchronous motor MTН-612, connected to an electrohydraulic source with moving electrodes. Methods: matching parameters of a shock generator and an arc discharge by the method of experiment planning using a mathematical model. Results. The authors have carried out the laboratory studies of operation of a low-voltage shock generator on an arc in water initiated by moving electrodes in the regime of single pulses and in the generation of a series of pulses. Using the method of experiment planning, the authors obtained the mathematical model of the shock generator operation on an arc in water, initiated by moving electrodes in the regime of single pulses; the regression equations are obtained for output parameters of the arc discharge. Optimization of the parameters of the shock generator and the electrohydraulic source was carried out, which allows obtaining the maximum pressure pulse for seismic exploration at shallow depth. The obtained amplitude-frequency spectrum of the pressure pulse showed that the main energy of the pressure pulse lies in the low-frequency range from 0 to 180 Hz, which provides a high seismic efficiency for seismic exploration at shallow depth.