This paper takes the X1012-X1011 well group in LH Oilfield D84 block as the research area.The characteristics of heavy oil reservoirs after steam stimulation are analyzed.It is found that after multiple cycles of conventional steam stimulation,the reservoir exhibits characteristics such as small heating radius,rapid pressure decline and low utilization degree.Then,aiming at these problems,numerical simulation studies on non-condensable gas assisted steam stimulation were conducted.The results show that non-condensable gases(CO2,N2,flue gas)assisted steam stimulation can effectively improve the development effect of heavy oil reservoirs,increase oil production and oil-gas ratio,among which CO2 has the best effect,worthy of application and promotion.
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