水驱油田油井分类新方法及分类油井调控对策

New classification method and control countermeasures of production well in water-flooding oilfield

均质油田储集层分布稳定,油层水驱前缘均匀,油井间开采差异小,注水开发效果好,因此,将油田单井平均产油量和产水量作为参考值,利用单井产油量偏差累加生成和产水量偏差累加生成,可以建立二维油井新分类方法——累计偏差系数法。若油田储集层非均质性较强,不同物性的储集层水驱效率存在较大差异,则需在均质油田油井分类方法的基础上对偏差进行物性校正,建立非均质油田油井分类方法——累计非均质系数法。利用油井新的分类方法能将油井划分为不同生产特征的4类井,也能连续性地展现单井的产状变化过程。油井分类新方法改变参考值为单井配产或上年末油井产量,可跟踪检查油井配产执行情况和老井调整效果评价,而且划分的4类油井生产特征差异突出,易于对生产不利因素形成调控对策。经玉果油田应用,效果较好,值得其他油田借鉴。

Homogeneous oilfield has the characteristics of stable reservoir, uniform frontal edge of water-flooding, little difference between oil wells and good effect of water-flooding. Therefore, regarding the average oil and water production as reference value, and using single well production deviation accumulation and water production deviation accumulation, a new two-dimensional oil well classification method, the cumulated deviation coefficient method, was created. Due to the strong heterogeneity of reservoirs, the water-flooding efficiencies of reservoirs with different properties are quite different. Based on the oil well classification method of the homogeneous oilfield, it is necessary to calibrate the deviation by physical properties to form cumulative heterogeneity coefficient method. The new classification method can not only divide the oil wells into four kinds of wells with different production characteristics but also show the change process of single well continuously. With the new classification method, taking the well production allocation or oil production at the end of la st year as reference value, oil well production performance and the effectiveness of adjustment were followed up or evaluated. The four types of oil wells were distinguished by prominent difference of production features and it is easy to control the unfavorable factors of production to form countermeasures. The application in Yuguo Oilfield has good effect and is useful for other oilfields.