Abstract: By using traditional calculation methods with practical field development data and numerical simulation method, reasonable oil production rate was predicted for the oil field. Based on data of low-permeability fields across the country,the correlation of oil recovery rate, formation flow coefficient and well spacing density was Obtained and oil-recovery rate prediction chart was plotted. With these methods,we compared the reasonable oil recovery rate in Baobei area in Yanqi basin and concluded that, under the current well spacing conditions, the reasonable oil recovery rate of Ⅱ formation and Ⅲ₁ subzone in Baobei Block should be 2% and 2.5% respectively.

Key words: Yanji, low permeability reservoir, oil recovery rate, prediction, evaluation