摘要：

新疆风城超稠油油田采用反渗透工艺对采出水进行降盐处理，在生产低盐水过程中同时产生浓盐水，即RO浓水。针对RO浓水回注乌36稀油井区展开了实验研究。结果表明：RO浓水满足乌36井区注水指标，对储层的损害弱，是良好的注水水源。RO浓水几乎无硬度，稳定性好，与乌36地层水配伍性好，在注水生产过程中不会发生结垢问题。RO浓水水温较高，可降低原油黏度，有助于提高原油采收率。使用RO浓水代替清水回注，可减少废水排放量，节约清水资源。

关键词: 反渗透, 油田注入水, 地层损害, 配伍性

Abstract:

The produced water was desalted by reverse osmosis(RO) process in Xinjiang's Fengcheng ultra-heavy oil field, and the concentrated salt water(namely RO concentrated water) was obtained simultaneously during the production of low salt water. Experiments were carried out by re-injecting RO concentrated water into Wu 36 thin oil well area. Results showed that the RO concentrated water met the water injection index of Wu 36 well area and had weak damage to the reservoir, indicating it was a good injection water source. RO concentrated water had almost no hardness, favorable stability, and good compatibility with Wu 36 formation water. No scaling occurred during the production process of water injection. RO concentrated water had a high temperature which enables to reduce the viscosity of crude oil and enhance oil recovery. The use of RO concentrated water rather than clean water re-injection can reduce wastewater discharge and save clean water resources.

Key words: reverse osmosis, oilfield injection water, formation damage, compatibility

中图分类号: 

• X703

• TE345