Bionic polyvinyl alcohol plugging gel for bionic drilling stopping pressure-bearing plugging drilling fluid

The invention relates to the field of oil and gas well drilling, in particular to bionic polyvinyl alcohol plugging gel for bionic drilling stopping pressure-bearing plugging drilling fluid. The polyvinyl alcohol plugging gel contains modified polyvinyl alcohol and a tackifier, wherein the modified polyvinyl alcohol is crosslinked by a boron crosslinking agent, and the modified polyvinyl alcohol is dihydroxy benzaldehyde modified polyvinyl alcohol. On the basis of underwater adhesion performance shown by creatures such as mussels in nature, bionic strong adhesion groups are introduced to molecular chains of the plugging gel, so that the capacity of the plugging gel for adhering and bridging a plugging agent and a crack wall surface in a water wetting environment is improved, the plugging gel is effectively prevented from being dispersed and collapsed by formation water or drilling fluid, the organic gel retention capacity is improved, and the plugging effect is improved. 本发明涉及油气井钻井领域，具体涉及仿生停钻承压堵漏钻井液用仿生聚乙烯醇堵漏凝