Abstract: Based on the comprehensive analysis of the sedimentary facies, reservoir characteristics and interlayer distribution of Guantao formation in Du 84 block in Shuyi area, it is concluded that Guantao reservoir has the static geological conditions to greatly improve the productivity of single well. By using reservoir engineering calculation and numerical simulation method, through comprehensive analysis, the main controlling factors of the production capacity in single well by steam assisted gravity drainage(SAGD) after steam stimulation were determined, as well as the corresponding technical countermeasures, including the composite flooding-drainage development property drain composite sandwich and flooding development,optimization of steam injection well point, reasonable control operating pressure, steam chamber at mining drainage, etc.