A low initial adhesion and high plugging performance profile control agent and a preparation method thereof

Abstract

The present application belongs to the technical field of polymer compound composition, and particularly relates to a low-initial-adhesion high-plugging-performance profile control agent and a preparation method thereof. The profile control agent comprises a slow-release main agent, a crosslinking agent, an adjusting agent and water, and the initial base fluid viscosity of the profile control agent is close to that of water. The macromolecular component in the profile control agent can slowly expand and hydrate after entering the deep part of the formation, and high-strength gel is formed by virtue of the chemical crosslinking action of the macromolecule and the crosslinking agent and the physical crosslinking action of the functional groups in the macromolecule. The results of the examples show that the profile control agent has the advantages of low base fluid viscosity, which is beneficial to the ground pumping and flow in the reservoir pores of the profile control agent; and the slow-release performance is strong, which is beneficial to the ground pumping and subsequent migration and plugging in the formation of the profile control agent. The gel formed by the profile control system has large gel strength, can effectively plug the channeling channels in the oil reservoir, and has excellent plugging efficiency, and can efficiently plug the channeling channels.

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