Oil-based drilling fluid as well as thermal adhesion plugging material and preparation method thereof

The invention provides an oil-based drilling fluid as well as a thermal adhesion plugging material and a preparation method thereof. The preparation method of the thermal adhesion plugging material comprises the following steps: adding propyl-2-methyl-2-acrylate, styrene, hydroxypropyl acrylate, an amino ionic monomer and acrylonitrile into deionized water, and uniformly mixing to obtain a first mixed solution; adjusting the pH value of the first mixed solution to 7-8, and adding a cross-linking agent while stirring to obtain a second mixed solution; putting the second mixed solution into a constant-temperature water bath, adding potassium persulfate, introducing inert gas, uniformly stirring the solution, heating to 60-100 DEG C, and reacting for 6-12 hours to obtain a polymerization product; and drying and crushing the polymerization product to obtain the thermal adhesion plugging material. The preparation method adopts an aqueous solution polymerization mode for synthesis, and the method ...