摘要
在低渗气藏开发过程中,储层应力敏感效应、气体滑脱效应以及产水是影响气井产能的重要因素。基于平面径向渗流原理,考虑储层应力敏感、气体滑脱效应以及气井产水,通过定义气水两相拟压力,推导出了低渗气藏中综合考虑储层应力敏感、气体滑脱效应以及产水条件下气井二项式产能公式。实例分析表明,产水以及储层应力敏感效应均使气井产能大大降低,而滑脱效应使气井产能增大,但影响较小。
During developing the low permeability gas reservoir, stress sensitivity and gas slip- page effect and producing water will be important factors which can affect productivity of gas well.Based on the theory of radial seepage near the vertical wellbore, the author considered the effect of stress sensitivity,slippage effect and water production on gas well productivity, defined the pseudo-pressure of two phases, deduced the binomial productivity formula of gas-water well to calculate the productivity under every factor.Case study shows as the in- creasing of stress sensitivity and water-gas volume ratio,the absolute open flow will become more and more smaller, while as the increasing of slippage factor, the absolute open flow will become more and more big, but the effect is verv small.
出处
《石油化工应用》
CAS
2015年第9期65-67,共3页
Petrochemical Industry Application
关键词
低渗气藏
产水
应力敏感
滑脱效应
气水两相拟压力
low permeability gas reservoir
water producing
stress sensitivity
slippage effect
pseudo-pressure of two phases
