Selective chemical water plugging method

The invention discloses a selective chemical water plugging method, and belongs to the technical field of oilfield development drilling. The selective chemical water plugging method comprises the following steps that a temporary plugging agent and a water plugging agent are provided; the temporary plugging agent is injected into an oil sleeve annulus of an oil well; after first setting waiting time, the temporary plugging agent is cured and coagulated; in the curing period of the temporary plugging agent, the water plugging agent is injected into the oil sleeve annulus; well shut-in operation is carried out on the oil well; and after the second setting waiting time, the water plugging agent is solidified and coagulated. According to the selective chemical water plugging method, before the water plugging agent is injected into the oil sleeve annulus, an oil outlet layer is protected by the temporary plugging agent, and the temporary plugging agent can be degraded and recover the infiltration capacity of the oi