Abstract: Reinjection in the Guantao geothermal reservoir was carried out at first and most frequently in the Tianjin area.However,at every time the reinjection rate rapidly declines after a few hours or days.The air-logged influence of reinjection liquids is mostly considered as the reason for the reinjection attenuation.Based on the test data,the major affecting factors are examined.The results show that a series of obstruction due to the reaction of reinjection liquids and reservoir in the course of co...