A mathematical model is established based on previous
migration and accumulation mechanism of petroleum. By
quantifYing geologic model it is transformed into a
computer model, which contains results of geologic analysis,
buoyancy model and fluid fill model. Also all kinds of
geologic factor and geologic process are considered such as
fluid potential, fracture, surface of unconformity and
inhomogeneity of passage stratum in order to make up the
disadvantage of non-adopting Darcy's law and overcomesome disadvantages of general migration and accumulation
simulation, which can not describe discontinuous medium
well