Well killing method using absorbent resin to protect low pressure oil and gas reservoir

The invention discloses a well killing method for protecting a low-pressure oil-gas layer by utilization of water absorbent resin, which is characterized by comprising the following steps: firstly, clear water or salt water with the well killing design flow is prepared; secondly, the water absorbent resin material is added, and the mixture is fully and uniformly stirred to form granular water; thirdly, the granular water is pumped into a pit shaft by a mud pump or a fracturing truck through normal circulation or inverse circulation; fourthly, the granular water is circulated for a circle after well killing, and after observing for 48 hours, the granular water is circulated for more than one circle after the inside of a well is stable, and a well mouth is opened for underground construction; and fifthly, the granular water in the pit shaft is exhausted by means of pumping, air lifting and so on, and the well is put into production. Because the granular water formed by the well killing method has good fluidity