萨北开发区聚驱油井清防蜡技术现场试验研究

发布时间：2018-02-03 13:18

本文关键词： 聚合物驱采出井清防蜡数值模拟　出处：《东北石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：目前聚合物驱替在我国大多数油藏规模化开展,由于驱替方式的改变,导致采出液的物理化学性质产生了质的改变,尤其是随采出液见聚浓度逐年上升,清防蜡困难的影响日益严重。分析油井的结蜡成因与影响因素,我们不难发现蜡是原油开采中的必然产物,由于开采过程中,埋深程度不同会有一定程度的温差与压差,这必然使得原油中的轻质低碳链组分不断溢出,最后结晶并且大量聚集,堵塞管径。水驱与聚合物驱最显著的区别是由于驱替液的浓粘程度不同,聚合物驱导致油井结蜡周期大幅度缩短,如果沿用水驱的采出井清蜡周期,将无法配合聚合物驱的生产情势,终将对采出程度造成不可避免的影响。因此不能继续应用水驱条件下的清防蜡措施。新型高效的清防蜡技术的现场试验研究变得愈发重要,也日渐成为石油工作者的研究热点。本文以萨北开发区为例,针对聚合物驱油井结蜡的实际情况有效分析并开展现场试验。1)对采油C厂与采油E厂开展试验区对比实验,分析方案实施效果,有的放矢的对比多方法的工艺适应性。2)对比分析聚合物驱与水驱条件下采出液与蜡质样本。3)总结油井结蜡规律,分析结蜡影响因素。4)对井筒蜡蜡沉积剖面数值模拟:结果表明,在相同产量、含水及时间条件下,随着含聚浓度的上升,结蜡厚度也随之增加,结蜡位置也相应下移,结蜡状况更为严重。5)研发DPW型聚驱降粘防蜡剂和旋转式冲击机械刮蜡器,并开展其适应性分析。
[Abstract]:At present, polymer flooding has been carried out on a large scale in most reservoirs in China. Because of the change of displacement mode, the physical and chemical properties of the produced liquid have changed qualitatively, especially the concentration of polymer has been increasing year by year. It is easy to find that wax is an inevitable product in crude oil extraction, because of the process of exploitation, it is easy to find out that wax is the inevitable product of crude oil production by analyzing the causes and influencing factors of wax deposit in oil wells. Different buried depth will have a certain degree of temperature difference and pressure difference, which will inevitably make the light low carbon chain components in the crude oil continue to overflow, and finally crystallize and a large number of aggregates. The most significant difference between water flooding and polymer flooding is that the waxing period of oil wells is greatly shortened due to the different degree of viscosity of flooding fluids. Will not be able to match the production situation of polymer flooding. It will inevitably affect the degree of recovery. Therefore, the application of wax removal and control measures under the condition of water flooding can not be continued. The field test study of new and efficient wax removal and prevention technology becomes more and more important. This paper takes the Sabei Development Zone as an example. According to the actual situation of polymer flooding oil well wax deposit, effective analysis and field test. 1) to oil production C plant and oil recovery E plant to carry out a comparative experiment in the test area, analysis of the implementation of the program. Comparative analysis of production fluid and wax samples under the conditions of polymer flooding and water flooding. 3) summarize the waxing law of oil wells. Numerical simulation of wax deposition profile in wellbore: the results show that under the same production rate, water content and time, the wax deposition thickness increases with the increase of concentration. The position of wax deposit is also shifted down, and the wax deposit is more serious. 5) DPW type polymer flooding wax reducer and rotary impact mechanical wax scraper are developed, and their adaptability analysis is carried out.
【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】：TE358.2

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