Self-adaptive underground working fluid level real-time monitoring device

The invention relates to the technical field of oil well oil extraction, in particular to a self-adaptive underground working fluid level real-time monitoring device which comprises a high-pressure nitrogen tank, a low-pressure buffer gas tank and a pressure reducing valve connected between the high-pressure nitrogen tank and the low-pressure buffer gas tank in series. The compression pipe is communicated with the low-pressure buffer gas tank, a one-way valve used for enabling gas in the low-pressure buffer gas tank to flow into the compression pipe in a one-way mode is connected between the compression pipe and the low-pressure buffer gas tank in series, and a compression piece used for changing the internal volume of the compression pipe is arranged at the compression pipe; one end of the release pipe is communicated with the compression pipe, the other end of the release pipe is communicated with a sleeve used for releasing high-pressure gas to the underground, a control piece used for controlling the rele