Abstract: Numerical simulation of careful parallel arithmetic of oil resources migration-accumulation of Tanhai Region(three-layer) was done.Careful parallel operator splitting-up implicit iterative scheme, parallel arithmetic program, parallel arithmetic information and alternating-direction mesh subdivision were put forward. Parallel arithmetic and analysis of different CPU combinations were done. This numerical simulation test and the actual conditions are basically coincident. The convergence estimation of the model problem has successfully solved the difficult problem in the fields of permeation fluid mechanics, computational mathematics and petroleum geology.

Key words: migration-accumulation, Tanhai region, careful numerical simulation, parallel arithmetic program, numerical analysis