Method for evaluating water trap damage of dense carbonate rock gas reservoir

The invention belongs to the technical field of petroleum and natural gas exploration and development, and particularly relates to a method for evaluating dense carbonate gas reservoir water entrapment damage, which comprises the following steps: carrying out capillary self-absorption experiment on a core sample of a dense carbonate gas reservoir to be evaluated, and calculating the water entrapment damage of the dense carbonate gas reservoir according to the ratio of the accumulated self-absorption volume to the pore volume of the collected core sample. The method comprises the following steps: acquiring the relative self-absorption amount of a rock core sample at corresponding time, acquiring the self-absorption rate of the rock core sample according to the ratio of the variable quantity of the relative self-absorption amount at a corresponding time interval to the interval time, and evaluating the aggravation or weakening of the dense carbonate gas reservoir water-phase trap damage according to the change