头台油田油井结垢规律与防垢措施研究

发布时间：2018-07-03 03:19

  本文选题：碳酸钙垢 + 阻垢率　； 参考：《东北石油大学》2017年硕士论文

【摘要】：大庆头台部分油田的油、水井管道已经产生了严重的腐蚀结垢问题,这无形中的增重检泵任务,同时增高了注水入压力,严重时甚至会阻碍了油、水井的正常运行,造成一定的经济损失。为解决头台油田的结垢问题,应采取有力的阻垢措施,有效的防止金属设备、管道和注水设施结垢。所以研究头台油田油井结垢规律和有效的防垢措施发迫在眉睫。本文调研了头台油田茂区的结垢现状,采集具有代表性的出水水样及结垢样品进行详细分析。运用仪器分析手段如X射线衍射(XRD)和电子扫描电镜(SEM)研究结垢样品构成元素及晶体类型。结合现有理论知识总结油井结垢规律是油井容易产生大量的碳酸钙垢和铁化合物垢,导致油井结垢的主要成因是水中含有大量的结垢离子如钙镁离子、碳酸根离子、碳酸氢根离子、腐蚀细菌等。本文实验主要研究七种常用油田阻垢剂的阻垢性能,总结实验结果优选出两种高效同时阻垢效果稳定的阻垢剂HEDP与HEDPNa2进行复配实验,研究发现HEDP与HEDPNa2在使用浓度比为3:2时,其阻垢率最高且阻垢效果稳定。本文实验研究了复配阻垢剂阻碳酸钙垢性能,实验结果表明该复配阻垢剂阻碳酸钙垢性能稳定,而且具有良好的协同性能。复配阻垢剂的阻垢率远高于使用单剂。另外本文还研究了复配阻垢剂的阻垢性能,总结复配阻垢剂与使用浓度、反应温度、反应时间、碱度、钙离子浓度的变化规律。最终实验结果表明复配阻垢剂在低使用浓度下阻碳酸钙垢性能较好。同时复配阻垢剂的抗钙离子能力、耐碱度、耐高温、有效时长都有所增强。
[Abstract]:The oil and well pipes in part of Daqing's Toutai oil field have already caused serious corrosion and scaling problems. This invisible task of increasing the weight of the pump and increasing the injection pressure will even hinder the normal operation of the oil and wells. Causing certain economic losses. In order to solve the scaling problem in Toutai Oilfield, effective scale inhibition measures should be taken to effectively prevent the scaling of metal equipment, pipelines and water injection facilities. Therefore, it is urgent to study the scaling law and effective scale prevention measures in Toutai Oilfield. In this paper, the present situation of scaling in Mao area of Toutai Oilfield is investigated, and representative effluent water and scaling samples are collected and analyzed in detail. The constituent elements and crystal types of scaling samples were studied by means of instrumental analysis such as X-ray diffraction (XRD) and electron scanning electron microscopy (SEM). Combining with the existing theoretical knowledge, it is concluded that the oil well scale is easy to produce a large amount of calcium carbonate scale and iron compound scale, and the main cause of the oil well scaling is the existence of a large number of scaling ions such as calcium and magnesium ions and carbonate ions in the water. Bicarbonate ions, corrosion bacteria, etc. In this paper, the scale inhibition performance of seven kinds of commonly used oil field scale inhibitors is studied, and two kinds of scale inhibitor HEDP and HEDPNa2, which have stable scale inhibition effect and high efficiency, are selected from the experimental results. It is found that the ratio of HEDP to HEDPNa2 is 3:2, and the experimental results show that the ratio of HEDP to HEDPNa2 is 3:2. The scale inhibition rate is the highest and the scale inhibition effect is stable. In this paper, the scale inhibition performance of the compound scale inhibitor calcium carbonate is studied experimentally. The experimental results show that the scale inhibition agent is stable and has good synergistic performance. The scale inhibition rate of compound scale inhibitor is much higher than that of single agent. In addition, the scale inhibition performance of the compound scale inhibitor was studied, and the variation law of the compound scale inhibitor and its concentration, reaction temperature, reaction time, alkalinity and calcium ion concentration was summarized. The final experimental results show that the compound scale inhibitor has good scale inhibition performance at low application concentration. At the same time, the calcium ion resistance, alkali resistance, high temperature resistance and effective time of the compound scale inhibitor are improved.
【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】：TE358.5
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本文编号：2092163