采油井液面恢复指数计算方法及应用

在油藏动态分析中 ,目前还没有一种综合油井产液量与液面资料的定量评价指标。参考注水井PI值求取方法 ,利用采油井停产后液面恢复数值 ,可以计算出油井的液面恢复指数LSI ,其大小是油井生产层出液状况的综合反应 ,包括出液极差型、一般型、极好型 3种。LSI指数可用来进行单井、井组或单元的定量分析 ,不受油井生产层位、泵效等因素影响。现场应用表明 ,该指数能很好地满足开发需要 ,使动态分析向定量化迈进一步

The Calculation Method and Its Application of LSI Index about Production Well

At present,there isn't a integrative quantitative index that combines the production and liquid surface. After the oil well is shutted off, the liquid surface rises as the production formation continues extravasating. Resembling the PI index calculation method of injection well, we can get the oil well's LSI index making use of its liquid surface build up curve. The LSI index is a kind of integrative reaction about extravasate ability of oil well. It has the poor type, the normal and good type. The LSI index can be used to analyse quantitatively for single well, well group or production unit. The spot practice indicates that LSI index can satisfy the need for oil field production well.