The invention discloses an environment-friendly high strength profile control water shut-off agent and a preparation method thereof, and aims to solve the problems that conventional water shut-off agents are
pollutant, and long-term use of the conventional water shut-off agent will pollute the environment and harm the
human body. The water shut-off agent is composed of high polymers, a cross-linking agent, a catalyst, an
antioxidant, and water. Through the organic cooperation among high polymers, a cross-linking agent, and a catalyst, a high strength, environment-friendly, and non-toxic profile control water shut-off agent is prepared, and the water shut-off agent can be widely applied to water shut-off operations of various oil reservoir profile controls.
Polyaziridine is taken as the cross-linking agent, and the prepared gel has the advantages of deeper
processing ground layer, higher strength, better stability, environment-friendliness, and no
toxicity. Experiment results have proven that the water shut-off agent can well improve the profile performance and the water shut-off performance, is capable of being applied to the oil fields, and can improve the development effect of
oil field water injection. The water shut-off agent is compounded by high polymers, a cross-linking agent, an
antioxidant, and the like, and can be widely applied to water shut-off operations of various oil reservoir profile controls.