Tubular column device used for oil-gas well and method used for finding production volume of oil-gas well

The invention relates to a tubular column device used for an oil-gas well and a method used for finding the production volume of the oil-gas well. The tubular column device comprises a testing tubular column, an ejector and a containing part. The ejector is fixed to the testing tubular column and used for perforation and fracturing. The containing part is provided with a containing hole allowing a swab of a suction device used for testing and production volume finding to move to achieve suction. The containing part is constructed to make the swab enter the containing hole via a tubular column hole of the testing tubular column, and the cross sectional area of the containing hole is smaller than the cross sectional area of the tubular column hole where the swab needs to pass. According to the tubular column device used for the oil-gas well and the method used for finding the production volume of the oil-gas well, perforation, fracturing, testing and production volume finding can be completed by placing downwar