轮南、桑解油田连续清蜡柱塞气举新工艺

随着轮南、桑解油田地层能量不断衰竭，部分新井自喷生产一段时间后井筒逐渐积液，以及部分高凝油井举升过程中随着井筒温度的降低而析出蜡质造成流通通道的堵塞。为了解决这一系列问题，通过室内研究与现场试验，在原有柱塞气举工艺的基础上，创新研发出一套“柱塞内部中空带拉杆结构+柱塞外部密封带刮蜡片结构”的一体化柱塞气举新工艺。该工艺解决了处于临界停喷状态下的高凝油井举升困难的问题，实现了不关井连续生产，现场应用6井次，减少制氮车气举作业73次，减少机械清蜡作业122次，累计增油25 416 t，累计增气1 403×104 m3。连续清蜡柱塞新工艺现场应用效果明显，已在相关油田进行推广应用，初步实现了临界停喷的高凝油井的高效连续生产。

A new continuous paraffin removal plunger gas lift process used in Lunnan and Sangjie Oilfields

In Lunnan and Sangjie Oilfields, wellbore liquid loading occurs in some new wells with the continuous depletion of formation energy after flowing for a while, and paraffin precipitates with the decrease of wellbore temperature in the process of lift in some high pour-point oil wells and blocks flow channels. To solve these problems, a new set of integrated plunger gas lift process of “hollow structure with tie rod inside the plunger + seal structure with paraffin cutter outside the plunger” was innovatively developed on the basis of the original plunger gas lift process by means of laboratory research and field test. This process solves the difficult lift of high pour-point oil wells in the critical state of quit flowing and realizes the continuous production without shutting the well. It has been applied on site 6 well times. Thanks to its application, the gas lift operation of nitrogen producing truck is reduced by 73 times, the mechanical paraffin removing operation is reduced by 122 times, cumulative oil increment is 25 416 t and cumulative gas increment is 1 403×104 m3. The new continuous paraffin removal plunger process presents remarkable field application effect and it has been popularized in the oilfields. And its application realizes the efficient continuous production of the high pour-point oil wells in the critical state of quit flowing.