▎ 摘　　要

NOVELTY - Reversible gel temporary plugging agent comprises 35-50 pts. wt. starch, 7-10 pts. wt. acrylic acid, 32-40 pts. wt. acrylamide, 0.8-1.3 pts. wt. chromium acetate, 0.21-0.42 pts. wt. ammonium bisulfite, 0.15-0.18 pts. wt. ammonium persulfate, 0.02-0.10 pts. wt. sodium hydroxide, 0.010-0.021 pts. wt. formaldehyde, 0.012-0.025 pts. wt. graphene particles, 0.01-0.03 pts. wt. walnut shell particles, 0.01-0.02 pts. wt. potassium chloride, 0.010-0.015 pts. wt. lignin, 0.01-0.02 pts. wt. wood fiber, 0.01-0.02 pts. wt. sodium metasilicate, 0.01-0.02 pts. wt. bentonite, 0.001-0.002 pts. wt. stearic acid monoglyceride, 0.01-0.02 pts. wt. epoxy resin, and 0.01-0.015 pts. wt. anhydrous calcium chloride. USE - The reversible gel temporary plugging agent is useful for water injection well. ADVANTAGE - The reversible gel temporary plugging agent has controllable gel forming time and gel breaking time, has the characteristics of absorption and slow release, is fully adapted to the technical requirements of temporary plugging of water injection wells for string checking operations, has fast temporary plugging speed, safety and stability, realizes effect of open well operation. The method detects gel forming time of the configured reversible gel temporary plugging agent, degradation time of the colloid and compressive strength steps of the colloid, screens reversible gel temporary plugging agents suitable for different operation requirements, and improves adaptability of reversible gels. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for temporary-plugging well repairing using reversible gel temporary-plugging agent for water injection well, comprising (i) uniformly mixing reversible gel temporary-plugging agent with clean water, where the mixing ratio of reversible gel temporary-plugging agent and clean water is (0.5-1.0):(99.0-99.5), (ii) detecting the gel forming time, degradation time of the colloid, and the compressive strength of the colloid of the reversible gel temporary plugging agent, (iii) performing pressure testing of the wellhead and pipeline, (iv) detecting the water absorption performance of the water injection well, (v) trying to inject clean water, (vi) extruding polymer gel, (vii) extruding the reversible gel, and (viii) pouring clean water, and reversely injecting clean water.