冯坪集输站含油污水回注处理技术研究

发布时间：2018-02-27 15:16

本文关键词： 川口采油厂冯坪集输站采油污水回注处理　出处：《西安石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：目前我国大多数油田都到了开发的中后期,采出液中的综合含水率为70-80%,有的甚至高达90%,大量的地层水被采出,经破乳脱油后形成油田污水。冯坪集输站日产油田污水1000m3左右,油田污水具有含油量高、悬浮物含量高、腐蚀速率大、细菌含量高等特点。如果不经处理直接排放,不仅会造成土壤、水源的污染,有时甚至会引起污油着火事故,威胁人们的生命与财产安全,势必造成油田与国家的经济损失；反之,如果对油田污水进行处理,并用于回注,不仅可以满足油田开采过程中注水量日益增长的要求,同时也可以节省水资源,减少环境污染,还可使油层压力保持稳定或者上升,确保油井高产稳产,有利于油田的可持续发展。注水开发是提高油田最终采收率和开发效益的主要方式,因此采出污水处理后回注是实现油田高效开发的关键。本文针对冯坪集输站储油罐乳化严重、脱出水油含量高设计相应破乳剂,通过油质分析、单剂筛选与复配,确定YC-P01复合破乳剂,加量200mg/L,满足现场破乳要求。采用化学氧化／絮凝沉降处理工艺,通过对pH值、除硫剂、絮凝剂、助凝剂进行优选,确定适合该站污水回注达标的工艺参数。实验结果表明：当pH值为7.5、除硫剂加量15mg/L、PAC加量80mg/L、PAM(1200万)加量1.0mg/L,先加PAC后加PAM,加药间隔20-30s时,处理后水悬浮物含量0.5mg/L,含油量0.54mg/L,平均腐蚀速率、结垢量、细菌含量分别为0.036mm/a、2.6mg/L、10个/mL,达到油田回注水水质标准,并提出具体改造方案。
[Abstract]:Most of our oil field to the late stage of development, the comprehensive recovery rate of 70-80% in aqueous solution, some even as high as 90%, a large number of formation water is collected, by breaking off the oil after the formation of oilfield wastewater. Feng Ping gathering station of Nissan 1000m3 oilfield wastewater, oil pollution water with oil content high, high suspended solids content, corrosion rate, high content of bacteria. If discharged directly without treatment, will not only cause soil, water pollution, sometimes even cause the oil fire accident threatens people's life and property safety, will inevitably result in oil field and national economic losses; on the other hand, if processing the oil field sewage for reinjection, can not only meet the growing process of water injection in oilfield development requirements, but also can save the water resources, reduce environmental pollution, but also can make the reservoir pressure keep stable or rise, ensure high oil wells Stable yield, conducive to the sustainable development of oilfield. Water flooding is the main way to improve the oil recovery and development benefit, thus produced water injected after treatment is the key to realize the efficient development of oil field. According to Feng Ping gathering station of oil storage tank severe emulsification, high oil content of dehydrated water designed by oil demulsifier. The analysis, selection and combination of single agent, YC-P01 composite demulsifier dosage 200mg/L, meet the site requirements. Demulsification by chemical oxidation / flocculation process, based on the pH value, sulfur removal agent, flocculant, coagulant optimization, process parameters for the station sewage reinjection standards. The experiment results show that when the the pH value is 7.5, the sulfur removal agent dosage, 15mg/L dosage, PAC 80mg/L, PAM (12 million) and the amount of 1.0mg/L, the first after the addition of PAC plus PAM, dosing interval 20-30s, 0.5mg/L aqueous suspension content after treatment, the oil content of 0.54mg/L, the average corrosion The rate, scale and bacteria content are 0.036mm/a, 2.6mg/L and 10 /mL respectively. The water quality standard of the reinjection water in oil field is reached, and the concrete reform scheme is put forward.

【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.6

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