Bio-enzyme degradable temporary plugging material and preparation method and application thereof

A process of applying a bio-enzyme degradable temporary plugging material in a well when drilling natural gas in sea areas comprising the following steps:

• (1) preparing a modified ceramsite by:
• mixing ceramsite with an aqueous solution of 3-aminopropyl trimethoxysilane, stirring, and drying to obtain the modified ceramsite;
• (2) preparing a bio-enzyme degradable temporary plugging material by:
• fully dispersing the modified ceramsite, ethyl cellulose, and an epoxy resin in dichloromethane to obtain an oil phase;
• adding the oil phase into a gelatin aqueous solution and mixing uniformly;
• stirring, evaporating the dichoromethane, filtering, washing, drying, and obtaining the bio-enzyme degradable temporary plugging material, wherein
• a mass ratio of the modified ceramsite, the ethyl cellulose, and the epoxy resin is (1-4):1:1;
• (3) plugging a reservoir during drilling of the reservoir by applying the bio-enzyme degradable temporary plugging material into the reservoir to maintain stability of well walls;
• and
• (4) contacting the bio-enzyme degradable temporary plugging material in the reservoir with a bio-enzyme when the drilling is completed to degrade the bio-enzyme degradable temporary plugging material.