The invention discloses a curing agent
sustained release capsule for gas injection channeling prevention, a channeling prevention agent and a preparation method of the curing agent
sustained release capsule. The curing agent
sustained release capsule is prepared from the following components in parts by weight, 20-40 parts of a resin curing agent, 5-35 parts of a density
regulator and 45-75 partsof a
coating agent, the resin curing agent is sealed in the
coating agent, and the density of the curing agent sustained release
capsule is 0.66-0.8 g / cm<3>. The preparation method of the curing agentsustained release
capsule comprises the following steps that all the components are evenly mixed at the high temperature according to a certain proportion, cooling is conducted to the
room temperature, crushing and
granulation are conducted, and thus the curing agent sustained release
capsule can be obtained. The density of the curing agent sustained release capsule prepared through the preparation method is between the density of water and the density of injected
nitrogen, and is closer to the density of the
nitrogen, thus the curing agent sustained release capsule can flow along with a gasinjection channel after being mixed with a resin material, the curing agent sustained release capsule has excellent
wellbore injectivity and meanwhile has the sustained
release action, a curing reaction is generated only when the curing agent sustained release capsule enters the deep part of an oil reservoir, and the excellent plugging property is achieved.