摘要
特低渗透油藏产能低,开发难度大已成为共识。为了对特低渗透油藏油井产能和油藏产量进行准确的预测,本文在达西公式的基础上,考虑到特低渗透油藏的渗流受到启动压力梯度的影响,推导出了具有启动压力梯度的间歇式生产的油井产能的预测模型,得出油井间歇式生产过程中采油量与时间存在指数递减关系;还推导得出油井关井时间段井底压力变化的数学模型,分析出其井底压力变化与采油时间段的采油速度有关,并给出了进行计算机迭代运算的求解方法和计算步骤。
It is consensus that ultra-low permeability reservoir is low deliverability and difficult to develop. In order to predict oil well deliverability and reservoir production of ultra-low permeability reservoir accurately, a deliverability prediction model in intermittent production was presented based on Darcy law. The effect of the threshold pressure gradient on the percolation laws was taken into account in this model. There was an index decline relationship between oil production and time within the slot of extracting oil in the oil production. A model of variation in the bottom hole flow pressure was presented between the production downtime. Variation in the bottom hole flow pressure is in connection with oil production rate at the slot of extracting oil was analyzed. The solution method and calculation steps used computer were given in this paper.
出处
《价值工程》
2015年第12期117-119,共3页
Value Engineering
基金
安塞油田精细注采调控数值模拟研究及应用(项目编号:201210719033)
关键词
特低渗透油气藏
启动压力梯度
产能预测
间歇式生产
ultra-low permeability reservoir, threshold pressure gradient
prediction
intermittent production
