FRACTURE CAVE-TYPE RESERVOIR OIL/WATER SELECTIVE SELF-EXPANDING RUBBER PLUGGING AGENT, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF

摘要

A fracture cave-type reservoir oil/water selective self-expanding rubber plugging agent, a preparation method therefor, and an application thereof. The plugging agent comprises the following raw materials, in parts by weight: 100 parts of nitrile rubber, 50-110 parts of a water-absorbing resin, 5-15 parts of an oil-swelling resin, 15-30 parts of a reinforcing agent, 0.5-2 parts of a softening agent, 2-5 parts of an accelerant, 3-6 parts of zinc oxide, and 0.5-3.5 parts of a vulcanising agent. The plugging agent can be applied to high-temperature high-salt high-mineralisation fracture cave-type carbonate rock reservoir deep plugging.