摘要
综合分析滑脱效应、启动压力梯度效应和高速非达西效应,依据渗流力学原理建立稳定渗流条件下综合考虑三种效应影响的低渗透气藏产能方程。应用该方程对不同滑脱系数和不同启动压力梯度下的流入动态曲线进行比较。在相同井底流压下,随着滑脱效应影响因子的增大,气井产能逐渐增大;随着启动压力梯度的增大,气井产能逐渐减小。
In response to the gas reservoirs with slippage effect,threshold pressure gradient and high-speed non-Darcy effect,based on analyzing synthetically those three effects,a new productivity formulae is deduced according to the fundamental principle of seepage mechanic in porous medium.In flow performance curves are comparatively analyzed under different slippage effects and threshold pressure gradients.Under the same downhole flowing pressure,the productivity is higher with the influence factor of the slippage effect increasing and the productivity is lower with the threshold pressure gradient increasing.
出处
《重庆科技学院学报（自然科学版）》
CAS
2012年第2期96-98,共3页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
国家重大专项"复杂结构井优化设计与控制关键技术"(2009ZX05009-005)
关键词
低渗透气藏
滑脱效应
启动压力梯度
高速非达西效应
产能方程
low-permeability gas reservoir
slippage effect
threshold pressure gradient
high-speed non-Darcy effect
productivity formula
