摘要
结合多年实际经验,就压裂气井不同流动阶段的划分依据和曲线特征、渗流特征及数学模型的建立完善及产能评价方法进行分析探讨,得到不同流动阶段的实用气井产能方程。研究发现,压裂气井的产能方程仍可用二项式表示,由于压裂气井的渗流特征与均质气井不同,在不同的流动阶段,对应着不同的产能方程系数,主要体现在产能方程系数A发生变化;对于压裂气井来说,要想获得可靠的产能方程及绝对无阻流量,在进行产能测试时,必须使气井的流动达到拟径向流阶段,否则确定的气并绝对无阻流量将偏大。
Combined many years of field experiences, the paper discusses partition basis of fractured gas well at different flowing period and curves property, percolation characteristics and foundation of mathematical model and the method of potential evaluation to get practical gas well production potential equation for various flowing stages. It is found by study that in despite of using binomial in production potential equation of fractured gas well, different coefficients is corresponding different flowing stages for various percolation and homogen gas well which mainly materializes at change of coefficient of A. For fractured gas well, to reach reliable potential equation and absolute open flow, pseudo radial flow stage should be get at well testing period, or deflection to determine absolute open flow is much big.
出处
《油气井测试》
EI
2006年第2期14-17,共4页
Well Testing
关键词
气井
压裂
产能
方法
研究
数学模型
Fracturing (oil wells)
Mathematical models
Oil well testing
Percolation (fluids)
