杏北区块油田污水处理问题分析及处理方法

发布时间：2018-02-28 03:06

本文关键词： 含油污水回注水水质工艺流程变化规律　出处：《东北石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：大庆油田杏北区块经过四十多年注水开发,各类油层都已不同程度水淹。该区块属于特低渗透油田,在采出石油的过程中会产生大量含油污水,同时为提高原油采出率还需要大量合格回注水回注地下。本文以大庆油田杏北区块关键节点油田污水作为研究对象,通过探讨大庆油田杏北区块含油污水的成因及来源,在分析油田污水站污水处理工艺流程的基础上,研究油田回注污水水质影响因素及变化规律。通过测定污水处理站各分节点污水中的主要污染物,研究影响油田污水水质的主要因素,主要包括含油量、悬浮固体颗粒含量、结垢和细菌等。为改善水质,对油田水处理过程起到促进作用,提出优化的技术方案:可考虑间歇性提温冲洗或适当提高来水温度;筛选药剂并优化调整加药浓度;调整反冲洗参数;对管线进行清垢;投加不同类型杀菌剂,监测不同作用时间对细菌的抑制作用,阻断细菌的代谢途径。
[Abstract]:After more than 40 years of waterflooding in Xingbei block of Daqing Oilfield, all kinds of reservoirs have been flooded to varying degrees. The block belongs to an ultra-low permeability oilfield and will produce a large amount of oily sewage in the process of producing oil. At the same time, in order to improve the recovery rate of crude oil, a large number of qualified water reinjections are required to be injected underground. In this paper, the sewage of the key node oilfield in Xingbei block of Daqing Oilfield is taken as the research object, and the cause and source of oily sewage in Xingbei Block of Daqing Oilfield are discussed. On the basis of analyzing the wastewater treatment process of oilfield sewage station, the influencing factors and changing law of oilfield wastewater quality are studied. The main pollutants in sewage of each sub-node of sewage treatment station are determined. The main factors affecting oilfield wastewater quality are studied, including oil content, suspended solid particle content, scaling and bacteria, etc. In order to improve the water quality, it can promote the process of oilfield water treatment. The optimized technical scheme can be considered as follows: intermittent warming and washing or properly increasing the temperature of incoming water; screening and optimizing the dosing concentration; adjusting backwashing parameters; cleaning the pipeline; adding different types of fungicides, To monitor the inhibitory effect of different action time on bacteria and block the metabolic pathway of bacteria.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X741

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