Oleophylic inert material for leaking stoppage of oil-based drilling fluid and preparation method of oleophylic inert material

The invention provides a preparation method of an oleophylic inert material for leaking stoppage of oil-based drilling fluid, which comprises the following steps: mixing an inert leaking stoppage material with an oleophylic thermoplastic high polymer, adsorbing the high polymer by the leaking stoppage material at high temperature, and cooling, processing and forming to obtain the surface oleophylic leaking stoppage material. An inert plugging material has strong hydrophilicity, is not easy to reside in an oil-based drilling fluid, has poor stability of a plugging layer and has a non-ideal plugging effect. According to the modified inert material prepared by the invention, on the premise of keeping the original plugging performance, the surface high polymer absorbs oil and expands, has cohesiveness, can bond leakage layer rocks and auxiliary plugging materials, improves the residence property of the plugging material and the stability of a plugging layer, solves the problems of flowback, re-leakage and the lik