| abstract |
The invention discloses a ternary composite temporary plugging agent for well killing and a construction method for well killing and temporary plugging. The particulate temporary plugging agent is prepared by dissolving dispersant, sodium chloride, xanthan gum, calcium chloride dihydrate, sodium sulfite and sodium molybdate in formation water; the temporary plugging agent for supramolecular swelling body is a copolymer of acrylic acid and acrylamide. The low-density killing fluid is an aqueous solution of polyacrylamide with a molecular weight of 10 million to 15 million with a molecular weight of 1 wt.‰. The temporary plugging agent, displacement fluid and well-killing fluid are completed; the temporary plugging agent and the temporary plugging construction method can effectively seal the reservoir and large fractures. |