Abstract:

A large number of high-temperature produced water was generated in the development of Misan Oilfield. To meet the requirements of the oilfield production and environmental protection, it is necessary to build a produced water treatment system with a treatment scale of 20 000 m³/d. The oil, suspended substance and H₂S in the water from the crude oil dewatering system are less than or equal to 1 000 mg/L, 500 mg/L and 200 mg/L, respectively. In view of the physical properties of the produced water, the treatment process adopts the pressure process, which consists of regulating storage buffer, coagulation deoiling, coagulation sedimentation, gas stripping desulfurization and two-stage filtration. After treatment, the purified water reaches the standards for the oilfield water injection. The project has been put into operation for more than two years, and its operation results are stable, which shows a good engineering reference.

Key words: produced water treatment, coalescence deoiling, coagulation sedimentation, gas extraction desulfurization, water injection

摘要：

米桑油田开发产生大量的高温采出水，为满足油田生产和环保要求，需配套建设采出水处理系统，处理规模为2万m³/d。原油脱水系统来水含油量≤ 1 000 mg/L、悬浮物≤ 500 mg/L、硫化氢≤ 200 mg/L。针对采出水物性，工艺采用"调储缓冲+聚结除油+混凝沉降+气提脱硫+两级过滤"压力式流程对采出水进行处理，全流程密闭隔氧，处理后净化水达标用于油田注水。项目投产运行两年多，装置运行效果稳定，具有很好的工程借鉴意义。

关键词: 采出水处理, 聚结除油, 混凝沉降, 气提脱硫, 注水

CLC Number: 

• X703