永宁采油厂徐庄联合站注水系统腐蚀结垢原因分析与防腐防垢方法研究

发布时间：2018-05-24 20:11

本文选题：注水系统 + 腐蚀结垢　；参考：《西安石油大学》2015年硕士论文

【摘要】：随着油田开发进入中高含水期后,油井含水不断上升,产出水矿化度急剧升高,同时伴有大量的侵蚀性物质,这些因素及其交互作用使得油气生产系统遭到严重的腐蚀与结垢。油水井不断发生油管腐蚀刺漏、抽油杆断脱事故,造成平均检泵周期大大缩短,油井作业频繁,原油生产成本逐年上升,严重影响了油田系统的正常运转。本文对永宁采油厂徐庄联合站生产系统腐蚀结垢现状,及污水处理站内设施、注水系统的腐蚀结垢现状进行调查研究,该注水系统腐蚀的因素主要有:1.含有腐蚀性较强的酸性成分CO2与H2S,降低pH并协同腐蚀;2.细菌含量高:繁殖过程产生H2S,生成硫化铁,沉积导致垢下点腐蚀加剧;3.工艺流程不完善、管理不到位,处理剂效果差。通过对该站污水处理与注水系统防腐防垢方法研究,建议做如下改造:(1)大罐排污:各沉降罐、除油罐、调节罐、储水罐设置排污装置,进行防腐处理,必要时加阴极保护;(2)完善加药系统:共9套加药装置,其中氧化剂与无机净水剂的加药装置要求耐蚀材质,加药泵要求耐腐蚀计量泵;(3)更换滤料:对于污染严重的滤料必须更换。(4)污泥处理:配套建设污泥池与污泥处理设施,减缓排污矛盾;(5)进行管线清洗,注意对H2S泄漏的防护。
[Abstract]:With the development of oil field entering the middle and high water cut period, the water cut of oil well increases continuously, the salinity of produced water increases sharply, and a large amount of erosive material is accompanied by these factors and their interaction make the oil and gas production system suffer serious corrosion and scaling. Tubing corrosion and leakage occur continuously in oil-water wells, which results in the shortening of average pump inspection period, frequent oil well operation and increasing crude oil production cost, which seriously affect the normal operation of oil field system. In this paper, the present situation of corrosion and scaling in the production system of Xuzhuang United Station of Yongning Oil production Plant, as well as the present situation of corrosion and scaling in sewage treatment station and water injection system are investigated and studied. The main corrosion factors of this water injection system are: 1: 1. CO2 and H _ 2S, which contain more corrosive acid components, reduce pH and cooperate with corrosion of H _ 2SO _ 2. High bacterial content: the reproduction process produced H _ 2S, forming iron sulfide, deposition caused by corrosion under the dirt intensified. The process is not perfect, the management is not in place, and the effect of the treatment agent is poor. Through the research on the anti-corrosion and anti-scaling method of sewage treatment and water injection system in this station, it is suggested that the sewage discharge of the large tank should be reformed as follows: each settling tank, oil removing tank, regulating tank, water storage tank setting up sewage device, and carrying on anticorrosion treatment, When necessary, add cathodic protection to improve the dosing system: a total of 9 dosing devices, in which oxidants and inorganic water purifiers require corrosion resistant materials, The dosing pump requires the corrosion resistant metering pump to replace the filter material: for the seriously polluted filter material, the sludge treatment must be changed. The supporting construction of sludge pool and sludge treatment facilities, the reduction of the sewage contradiction (5), the pipeline cleaning, and the prevention of H 2S leakage are paid attention to.
【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】：TE983

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