Nitrogen Foam Profile Control for Heavy Oil Reservoir
In view of the character of heavy oil reservoir in Shengli oilfield under thermal production, the analysis that heterogeneity of oil reservoir, viscosity of crude oil, oil thickness, recovery efficiency of recoverable reserves and distance to the oil-water boundary affect the effectiveness of nitrogen foam profile control was made by reservoir numerical simulation and statistical interpretation of production effect of some wells which had being implemented nitrogen foam profile control. On that basis, a prediction model of nitrogen foam profile control technology was founded by means of the fuzzy comprehensive evaluation, and the reservoir conditions which adapt to nitrogen foam profile are presented. The results The adaptive research of nitrogen foam profile control in steam stimulation reservoir can enhance the pertinence and effectiveness of nitrogen foam profile control technology and improve the efficiency of multi-round steam stimulation in heavy oil reservoir.
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