Supramolecular gel-low-temperature high-strength gel casing damage sand consolidation plugging method

The invention discloses a supramolecular gel-low-temperature high-strength gel casing damage sand consolidation and leakage stoppage method which comprises the following steps: performing sand washing and drilling to the bottom of a casing damage point, cleaning a borehole, sequentially injecting prepad fluid, spacer fluid, post-cleaning fluid and clear water into the well, and standing; preparing low-temperature high-strength gel plugging slurry, injecting the low-temperature high-strength gel plugging slurry into the well for sand consolidation and plugging, finally cleaning each construction device, and observing the sealing effect after the low-temperature high-strength gel plugging slurry waits for setting. The supramolecular gel is directly squeezed and injected to react with formation water, high-concentration and high-strength gel is formed under the action of airflow disturbance, the high-concentration and high-strength gel can be coalesced and detained near casing damage, better detention and water