驱排剂解堵工艺的研究与应用

吐哈温米油田属于低孔、低渗、低产能油藏,原油含蜡量、沥青质较高,油井的近井地带结垢严重。文章介绍了驱排剂的解堵作用原理、酸化工作液配方、驱排剂解堵工艺技术和现场应用效果。研究结果表明,驱排剂解堵工艺技术对解除油井的堵塞具有良好的效果,对提高油井的产液能力有重要作用,同时又是低渗透油田增产的一种新工艺。从2004年7月份开始,温米油田利用驱排剂解堵后油井平均单井日增油量3.0t,日增液量21.0t,动液面平均上升400.00m,平均单井有效生产期为90天以上。

Research and Application of Displacing Agent for Blocking Removal Technology

The reservoir of Wenmi Oilfield in Tuha area is characterized by low porosity, low permeability and low productivity, as well as high wax and high asphalt in crude oil. The region near oil well was scaled seriously. A blocking removal technology using displacement agent is proposed. The blocking removal mechanism of displacement agent, formulation of acidified fluid, blocking removal technology and the field application of displacement agent are investigated. The result indicates that the blocking removal technology using displacement agent has the good effects to relieve the blocking of oil well and to increase fluid productivity. This method is suitable to increase the production of low-permeability oilfield. The displacement agent has been applied in Wenmi Oilfield since July, 2004. Up to now, the average oil production of single well has increased by 3.0 tons per day, and the fluid productivity increased by 21.0 tons per day. The working fluid level increases by 400m averagely. The average production term of single well is above 90 days.