In recent years

the shock waves generated by water discharge are used to deblock and increase production of oil and gas wells

and it has attracted more and more attention due to its environmentally friendly

remarkable effect of increasing production and low cost. Based on the practical application of oil and gas well deblocking technology

this paper establishes a complete underwater discharge experimental platform. The experimental platform is mainly composed of a voltage regulator

a step-up transformer

a storage capacitor

a gas switch

and an underwater load

wherein the storage capacitor is 50～250 μF

and the charging voltage is 2～10 kV. Based on the above experimental platform

the experimental study and analysis of the discharge characteristics in water were carried out. By adjusting the charging voltage

liquid conductivity

electrode spacing

and other experimental factors to discharge in water at different levels

the current

voltage and shock waves were measured and analyzed during the discharge process

and the influence of various factors on the discharge in water was summarized. In the heating process of the water channel

the factors affecting the heating time and the leakage energy are mainly the electric field intensity around the electrode

the water channel distance

and the ion concentration. The optimal gap distance and the optimal water conductivity size make the shock wave amplitude and energy to reach maximums

and the shock wave energy will be saturated with the increase of voltage and capacitance.