摘要
油井转注后,随着注入水将井底附近的油驱走,注水井吸水指数不断增加,然而这一变化规律并无准确的计算公式。文中以平面径向流等饱和度面移动方程和经典的达西径向流公式为基础,结合含水率随含水饱和度变化曲线,推导出注水井米吸水指数随米累积注水量的变化规律。最后利用油田实例进行分析计算来验证公式的正确性,为未来注水井米吸水指数的计算和水井的配注提供理论依据。
When a production well adjusted to an injection well, the water injectivity index of the well will keep increasing with the oil near the well bottom being droved away by the injected water. However, there is no accurate formula to describe the law so far. Based on the Buckley-Leverett equation and the classical Darcy equation, combined with the relationship curve of water cut and water saturation, the relationship formula of the injectivity index per meter and cumulative water injection per meter was deduced. Finally, the field data was used to analyze and verify the validity of the formula. This formula provides a theoretical basis for the future calculation of injectivity index per meter and the well injection allocation.
出处
《岩性油气藏》
CSCD
2012年第1期112-116,共5页
Lithologic Reservoirs
基金
国家科技重大专项"十二五"项目"大型油气田及煤层气开发"(编号:2011ZX05057-001)
关键词
吸水指数
米吸水指数
米累积注水量
注水开发
injectivity index
injectivity index per meter
cumulative water injected per meter
waterflood
