摘要
排水采气是气藏生产中后期维持气井生产的重要措施之一,其工艺较多,对于产水量小于100m3/d、产层深度小于3000m的低压气藏,机抽排水采气具有不增加对地层回压、理论上可将气采至枯竭等独特优点,但由于常规有杆泵排水采气工艺存在泵挂深度浅、泵效低、检泵周期短等问题,限制了机抽排水采气的应用。通过对机抽排水采气配套的防腐防气整筒式金属柱塞陶瓷泵阀泵、组合式井下高效多相分离器、抽油泵承载阀等配套装备的研发和对整个机抽排水采气系统的优化设计,使泵效与检泵周期得到了较大提高。针对宋8井机抽排水采气存在的主要问题,提出了合理的配套技术方案与措施。结果表明,应用新的配套技术后泵效在70%以上、检泵周期超过4个月,明显高于常规机抽排水采气技术水平,较好地满足了机抽排水采气的需要。
Drainage gas production is one of the most important measures to maintain gas reservoir production in middle and late period.Since it has many technologies,drainage gas production by pumping has unique advantage of not increasing formation back pressure and developing gas reservoir until exhausted for low pressure gas reservoir with water production less than 100 m3 /d and reservoir depth less than 3000 m while gas drainage recovery by conventional sucker rod pump has shortcomings such as shallow pump setting,low pump efficiency and short pump inspection period etc.,thus its application is restricted.Through developing matching equipment of drainage gas production by pumping including anti-corrosion and anti-gas one piece metal column ceramic pump valve,high efficiency combined downhole multiphase separator and biased valve of sucker rod pump and optimistically designing the whole system for drainage gas recovery by pumping,as a result,pump efficiency and pump inspection period are relatively enhanced.In view of the main problems existed in drainage gas recovery of the well Song-8 by pump,the reasonable matching technique programs and measures are put forward.The result shows that pump efficiency is increased to above 70% and pump inspection period is above 4 months,obviously higher than that of conventional gas drainage recovery by pump,which meets the demand of gas drainage recovery.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2009年第5期85-88,共4页
Natural Gas Industry
关键词
排水采气
配套
技术
泵效
深度
周期
gas drainage recovery,matching,technique,pump efficiency,depth,circle
