ENVIRONMENTALLY FRIENDLY PULSE POWER CONTROLLABLE SHOCK WAVE INCREASED PERMEABILITY IN OILFIELD RESERVOIRS

As the oil field production time increases, oil seepage channel plugging will occur near the well-bore. The chemical deblocking method has high cost and short deblocking effective period, causing secondary damage to oil wells, and easily causing prominent problems such as environmental pollution. The permeability enhancement technology of pulse power controllable shock wave is a technology for oil layer treatment through the high-pressure discharge in downhole fluid. It uses the strong nonline-arity controllable shock wave generated by the hydroelectric effect explosion to cause directional propagation of pressure pulse in the formation, which generates strong shock and vibration force on various media in the formation and pores. Under the action of the shock wave, micro-fracture is generated on the reservoir, which can relieve the plugging and increase the injection. Compared with other physical and chemical unplugging technologies, the technology has the advantages of simple construction process, low operation cost and controllable energy.