Well cementation cement sheath first interface fluid channeling rule numerical simulation method and device

The invention provides a well cementation cement sheath first interface fluid channeling law numerical simulation method and device. The method comprises the steps that well cementation data of a well cementation cement sheath to be detected are obtained; establishing a fluid channeling model of a first interface of a well cementation cement sheath according to the well cementation data, wherein the fluid channeling model comprises a geometric model and a grid model; determining a fluid channeling law theoretical formula of a fluid channeling model according to the geometric model; performing mesh number division on the mesh model and setting fluid channeling conditions of the fluid channeling model; and obtaining a numerical simulation result of a first interface fluid channeling height change rule according to the fluid channeling model. The fluid channeling model of the first interface of the well cementation cement sheath is constructed, the geometric model is used for simulating all structures of the wel