The invention relates to the technical field of numerical
simulation, in particular to a grid model generation method for the fluid displacement process of well cementation
engineering. The method comprises the following steps: acquiring geological data of a well cementation
project area, and constructing an initial geological model; well cementation
engineering design data are obtained, well cementation
engineering topological structure modeling is carried out, and a well cementation engineering topological structure model is obtained; according to the initial geologic model and the well cementation engineering topological structure model, fluid
dynamic simulation is carried out, and a fluid
characteristic matrix is obtained; performing fluid displacement
process simulation according to the fluid
characteristic matrix to obtain fluid displacement process data; performing fluid displacement
process optimization on the well cementation engineering
design data based on the fluid displacement process data to obtain optimized fluid displacement process data, and performing
resource allocation redistribution on the well cementation engineering
design data according to the optimized fluid displacement process data to obtain optimized well cementation engineering design data. According to the invention, the accuracy of fluid displacement
simulation can be improved.