The software adopts a non-structure PEBI grid, a black oil model is adopted
for water flooding, a component model is adopted for the chemical flooding and polymer
flooding, a control volume method is used to disperse, the black oil model can provide
single-phase, two-phase and three-phase oil-gas water flowing simulation work, The complex
cases such as bubble point, inter-formation heterogeneity, formation crossflow and so on are
also considered; The software has the function of loading geological body data, supporting
the function of geological coordinates and phase controlled modelling. The main technologies
are as follows:
Grid intelligent division technology: On different blocks of oil
reservoir simulation area, different grid and coordinate system are used by combining fluid
flow characteristics. Rectangular, hexagonal and variable scale unstructured PEBI grids are
provided by software. Intelligent grid uses different streamlines in different well patterns
to optimize the number of grids to reduce the number of grids under the condition of
ensuring the accuracy of the solution.
Matrix pre-processing technology: Algebra multigrid and GMRES are
used to pre-process and solve the matrix, and the calculation speed is improved on the
premise of ensuring the accuracy of the solution.
Calculation of over bubble point of gas bearing phase: With the
decrease or increase of pressure, gas spills from oil or dissolves into oil, which brings
the complexity of calculation, thus, the pressure and saturation of the bubble point grid
Visualization of calculation: The calculation results are
displayed intuitively in the form of two-dimensional and three-dimensional graphics.