One kind of accident relief wells and wells three electrode system communication with the detection system based on

The present invention relates to a relief well in communication with the well incident detection system based on three-electrode system. The system includes a ground power supply apparatus, terrestrial signal acquisition device, surface relief well accident well communicating detection computing system, the surface electrode, a downhole three-electrode system, a downhole probe; ground power supply apparatus downhole three-electrode system, terrestrial signal collecting device and ground relief wells accident well communicates detecting computing system power supply; ground signal collecting device after the received data is converted format is sent to the calculated surface relief well accident well communicates detecting a computing system, and the form of numbers, text and / or graphically display. The present invention employs a three-electrode system as a downhole current signal transmission source, to ensure that the main electrode current does not flow flowing along the axial direction from the relief wells may be detected directly from the relief well to the downhole well and orientation accident, avoiding the accumulation of errors, applicable to the accident near the wellhead conditions can not close, you can work in deep wells.