The invention belongs to the field of
polymer hydrogel, and particularly relates to water plugging gel and a preparation method and application thereof.The water plugging gel is prepared from 110 parts of
acrylamide monomer, 5-35 parts of
tannic acid, 5 parts of
polyvinyl alcohol, 0.2 part of cross-linking agent, 0.15 part of initiator, 2-6 parts of functional additive
dry weight and water, and the final water plugging gel is 400 parts through the addition amount of water. The
tannic acid can provide multiple key sites and multiple interactions, such as
hydrogen bonds, ionic bonds, coordination bonds, and hydrophobic interactions. TA is added into a
polymer solution of the hydrogel, the
physical property of the hydrogel can be enhanced through interaction with functional groups of TA,
tannic acid and
acrylamide serve as base materials, the price is low, water
solubility is good, the use concentration is low,
nitrogen protection is not needed in the reaction process, and good field adaptability is achieved.