摘要
单点试井方法在预测气井产能时较多点回压试井、等时试井、修正等时试井简单快捷,受到油田现场的广泛采用。但目前常用的三种一点法产能公式,在预测具体气藏无阻流量时存在一定的局限性,计算结果与二项式结果偏差较大。文章基于锦州20-2异常高压凝析气田丰富的系统试井资料,对一点法产能公式进行了改进,建立了体现该气藏地质油藏特征的产能公式。实例计算表明,新产能公式简便易行,计算结果可靠。
Compared to multiple-point backpressure well testing,isochronal flow testing and modified isochronal flow testing,the single-point method is easier and more rapid during the gas well productivity prediction.Thus,this method is applied widely to oilfields.However,for the three kinds of single-point productivity equation in common use,there exists a certain limitation in predicting open-flow potential of gas reservoirs.Moreover,there exists a larger deviation between calculated result and binomial result.JZ 20-2 belongs to an abnormal high-pressure condensate gas field.Based on abundant and systematic well testing data of JZ 20-2,this paper improves the single-point productivity equation and establishes another productivity equation embodying the geological and engineering characteristic.Case calculation indicates that the new productivity equation,with reasonable calculation result,is very simple.
出处
《天然气勘探与开发》
2008年第1期12-14,共3页
Natural Gas Exploration and Development
关键词
异常高压
凝析气藏
产能公式
无阻流量
单点测试
abnormal high pressure,condensate gas reservoir,productivity equation,open flow potential,single point test
