gravitational differentiation वाक्य

In order to improve oil displacement efficiency of infusing agents and precisely to predict the three dimensional distribution about residual oil , taking the sand body of p 2 individual meandering river - channel in putaohuareservior of daqing oilfield as an example , by analyzing the thin interbeds and vertical permeability discrepancy , this paper brings forward the space configuration of the thin interbeds in single sand body , the vertical permeability distribution and gravitational differentiation which control the distribution of residual oil and the vertical multisection model of displacement efficiency in the condition of excluding exploitation factors and identical single sand - body ,