多组分复合解堵降压增注技术在安塞油田的应用

Application of multi-component composite technology for plugging relief and increasing water injection in Ansai oilfield

针对造成安塞低渗透油田储层堵塞的原因,提出了多组分复合解堵降压增注技术,通过室内实验模拟了本技术在安塞低渗透油田的适应性。酸质解堵处理剂对低渗储层岩心改善效果显著,氧化剂起到了降低腐蚀速率和保护钢材的作用。在安塞油田现场的试验表明,油井产液、产油上升较快,含水平稳,增油效果明显;注水井的注水量在能达到配注要求的同时,注水压力下降明显,降压增注效果较好。

In order to solve the problems of low permeability reservoir blocked reasons in Ansai oilfield, the multi-component composite plugging relief and injection gain technology is proposed in this paper, through laboratory experiments simulating the adaptability of this technology in Ansai low permeability oilfield. Acid treatment of plugging solution has a sig- nificant effect to improve the low permeability reservoir core and oxidants play a lower corrosion rate and the protection of steel. The tests in Ansai oilfield show that fluid and oil production increased rapidly but water smooth in oil wells ,the effect of increasing oil is obvious; water injection can achieve inJection allocation requirements at me same tlIIle, tilt; injection pressure significantly decreased, long period of validity, the effect on decreasing injection pressure and improved injection capacity are satisfactory.