Crude oil and oil layers, like groundwater, is ejected upwards along the borehole once the holes are drilled, owing to the oppression of the oil itself by the huge energy of the reservoir (dissolved air, the top of the gas). According to this principle, the exploitation of crude oil in the oil field development is a primary oil recovery and this time the wells are from the well. Along with the continuous recovery of crude oil, the original energy of the reservoir gradually depleted, crude oil cannot be ejected. The recovery rate of a single oil recovery is generally only around 15%. It is called secondary oil recovery when the reservoir water or non-mixed gas to add oil layer energy to promote the oil to move to well, and thus further extraction of crude oil in the oil field could be developed. As the composition of the oil layer of rock particles size is not uniform, irregular shape, resulting in different layers of pore size, permeability heterogeneity. The greater the permeability ...