连续冲砂工艺技术的开发与应用

针对传统水力冲砂施工过程中 ,停泵接单根易造成砂卡冲砂管柱事故以及从油井中返出的冲砂液不能循环使用的问题 ,开发了高效无污染的连续冲砂工艺技术。该技术通过连续冲砂装置和多级除砂装置的配套使用 ,实现了不停泵连续冲砂和冲砂返出液有效除砂后的循环使用 ,有效地避免了卡井事故的发生 ,解决了冲砂作业时造成的地面污染问题 ,提高了冲砂效率 ,减轻了操作者的劳动强度。 2 0 0 3年现场应用 5 0余井次 ,未发生砂卡冲砂管柱事故 ,油井的冲砂作业时间平均缩短 2 0 % ,单井平均排砂量 0 8m3,单井回收原油 1 2m3。

Development and application of continuous sand washing technology

In the light of the shortcomings of the traditional sand washing technology, a high-efficiency non-pollution continuous sand washing technology is developed.The technology can realize sand washing without stopping the pump and reuse of the returning fluid with sand removed by using the continuous sand washing device along witll the multiple-stage sand removal device.By means of this technology,sand stick of the string can be avoided and pollution problem in the sand washing operation can be solved.Application of the technology on 50 wells shows that,no sand stick occurred,and the time for the sand washing is reduced by 20% averagely.