Abstract: In order to better achieve the equilibrium effect of fluid for horizontal wells in bottom water reservoir,in view of variable density screen with blind pipe curtains on well completion technology,the matching curtains on parameters optimization method have been discussed,the coupling model describing the curtains on process has been established.By using the infinitesimal section method,considering the curtains on completion string for various influence of coupling flow,the quantitative calculation scheme has been given.Example calculation shows that the variable density screen with blind pipe of well completion technology of curtains on adjusting the amplitude of the differential pressure oil well production profile can be above 80%.The flow rate distribution profile shows the characteristics of similar infinite diversion in the horizontal wellbore,regulating effect is better.Variable density screen throttling action results in lower average net horizontal well production pressure difference.Under the condition of actual situation,it can improve the total production pressure differential output.