Capillary tube pressure measuring system and compensation device of capillary tube pressure measuring system

The utility model discloses a capillary tube pressure measuring system and a compensation device of the capillary tube pressure measuring system, and relates to a capillary tube pressure measuring system for underground pressure data collection of an SAGD (Steam Assisted Gravity Drainage) well. The compensation device comprises a first filter amplifier, a second filter amplifier and a data collecting unit, wherein the input end of the first filter amplifier is connected with the well head pressure output end of a pressure transmitter of the capillary tube pressure measuring system; the first filter amplifier is used for carrying out filtering and amplification processing on well head pressure signals; the input end of the second filter amplifier is connected with the underground pressure output end of the pressure transmitter of the capillary tube pressure measuring system; the second filter amplifier is used for carrying out filtering and amplification processing on underground reference pressure signals; the first signal input end and the second signal input end of the data collecting unit are connected with the first filter amplifier and the second filter amplifier; and the data collecting unit is used for collecting the well head pressure signals and the underground pressure signals subjected to the filtering and amplification processing. The capillary tube pressure measuring system and the compensation device have the advantages that the collected pressure data can be subjected to compensation calculation, so that the calculated pressure value in an underground specified position is more precise.