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通过对焉耆盆地低渗透油藏地质、开发特征的分析研究,除应用传统的实际开发资料计算法、数值模拟法对油田合理采油速度进行预测外,还收集整理了全国25个低渗透油田区块的资料,统计回归出采油速度与地层流动系数以及井控面积关系。运用以上方法,针对宝北区块的开发地质现状,对目前并网条件下的合理采油速度进行了预测评价、确定Ⅱ油组和Ⅲ1小层的合理采油速度分别为1.85%和2.50%。
Based on the analysis of the geological and exploitation characteristics of low permeability reservoirs in Yanqi Basin, in addition to using the traditional calculation method of actual development data and numerical simulation to predict the reasonable oil recovery rate of oilfields, 25 low permeability oilfields Of the data, statistical regression oil recovery rate and formation flow coefficient and well control area relationship. Based on the current geological conditions of development in Baobei block, a reasonable prediction of oil production rate under grid-connected conditions is made. The reasonable oil recovery rates of Ⅱ oil group and Ⅲ1 sublayer are 1.85% and 2.50% respectively.