The present application belongs to the technical field of
oil field chemistry, and particularly relates to a slow-release gel breaker, an intelligent controllable temperature-resistant temporary plugging agent and a preparation method thereof. The raw materials of the slow-release gel breaker include the following components in parts by weight: silver salt and a complexing agent, wherein the complexing agent is
ammonia or 1,4-dicyanobenzene; the raw materials of the intelligent controllable temperature-resistant temporary plugging agent include the following components in parts by weight: the slow-release gel breaker, a
thickening agent, an initiator and a crosslinking agent. The preparation method includes mixing and reacting the silver salt and the complexing agent to obtain the gel breaker, dissolving the
thickening agent in water, adding the initiator, the crosslinking agent and the gel breaker, mixing and reacting to obtain the product. Compared with the existing temporary plugging agent technology, the present application has the advantages of low
viscosity before injection, one-time injection into the formation, arbitrary control of gel breaking time, plugging rate greater than 90%, good plugging property, reduced cost and time of secondary injection of the gel breaker, and important significance for
oil field measures such as profile control, water plugging and acidizing fracturing.