苏里格气田苏6井区老井生产分类研究

Classified research on the production of old gas wells in Su 6th area of Sulige gas field

苏里格气田属低渗透、低丰度气藏,气井普遍具有低压、低产、小水量、含凝析油的特点,气井生产中后期,气体滑脱损失大,井筒压力损失增大导致气井携液能力变差。针对苏里格气田最早开发的28口老井压力与产量变化关系,分析了井筒压力梯度分布规律及气井生产情况,在对大量生产数据跟踪分析的基础上,研究了苏6井区老井生产规律,提出了苏里格气井生产所要经历的三个时期(连续平稳生产期、自然间喷生产期、间歇生产期)并对气井三个生产时期的特征进行了分析和研究。

The Sulige gas field is a low- pressure and low-abundance gas reservoir.The gas wells are generally characteristic of low -pressure,low production,poor water and low condensate oil.When the production of the gas wells steps intermediary and later stage,the intensification of the slip phenomenon and the pressure loss diminishes the capability of gas wells unloading liquid.According to the history of pressure and production of 28 old wells in the Sulige gas field,the change of wellbore pressure gradient and the situation of production are both analysed.On the basis of mass analytical data,the article discusses about the history of these old gas wells in su L area,describes 3 production periods of the Sulige gas wells（continuous and constant production period,instinct heading period,intermittent production period）,and explores the characteristics of 3 production periods.