Test method of improving positive sequence and correcting isochronal well testing for low permeability tight gas reservoir

The invention discloses a test method of improving positive sequence and correcting isochronal well testing for a low permeability tight gas reservoir. The test method comprises the following steps that data of drilling and completion, well logging and coring of a low permeability tight gas reservoir exploration producing test target well are collected and sorted, and the data is comprehensively analyzed to obtain basic parameters of the gas reservoir and the gas well; exploration producing test work is carried out on the target well by adopting a five-open five-shut-in improved positive sequence test mode, wherein the size of a well opening air tap is enlarged step by step to obtain the gas testing production, which is increased step-by-step, of a well opening gas well; and during the well opening time and the well shut-in time of the improved positive sequence test, the shut-in time of one-shut-in is greater than the well opening time of one-open, the rest well shut-in time is the same as the well opening t