三元集输系统除垢技术研究

发布时间：2018-05-19 07:13

  本文选题：三元复合驱 + 集输系统　； 参考：《东北石油大学》2017年硕士论文

【摘要】：随着杏北油田进入特高含水期,三次采油工艺的不断扩大,三元复合驱集输系统见剂浓度的不断升高,在实际生产运行过程中主要存在以下三方面的问题:一是集输工艺淤积结垢问题比较突出;二是部分环节不能清垢问题;三是部分工艺清垢工作程序复杂。目前在防垢方面所用的技术有电子防垢仪、超声波防垢仪以及化学药剂防垢技术等,但这些防垢技术的在实际应用中效果不是特别的明显。转油站内、计量间内部U型汇管尚没有形成适合空穴射流操作的工艺技术。针对原工艺流程不能很好的满足生产实际需求,从三元集输系统容易形成垢淤的关键节点入手,形成了一套适应于三元复合驱的清垢工作快捷、运行效率高的工艺技术。主要研究内容:(1)优化了机械式自动除垢加热炉运行模式及合理的刮垢周期,刮垢周期为3次/天,能够保证其在高效状态下运行,避免了钢刷频繁刮垢造成的磨损及对油水界面的扰动问题。(2)完善了机械式自动除垢加热炉配套工艺,通过对分体炉的最上层换热体增设60目过滤网,实现对刮垢钢刷刮掉的垢质进行截留,悬浮物去除率达到51.6%,有效防止刮掉的垢质进入下游掺水管道。(3)明确了在线大排量冲洗参数,通过现场试验摸索出单井管道长度600米,用71℃热水,压力2.85MPa冲洗1.5h;管道长度≥600米,用71℃热水,压力2.85MPa冲洗2.0h,能够满足三元开发前期淤积物以蜡为主的管道冲洗要求。(4)形成了集输管道清淤除垢措施模版,根据井口不同回压等级及含剂浓度,通过调大掺水量、在线高压冲洗、集输管道空穴射流等措施保证集输管道通畅。
[Abstract]:With the Xingbei Oilfield entering the extremely high water cut period and the continuous expansion of the tertiary oil recovery process, the concentration of the agent in the ASP flooding gathering and transportation system is increasing. There are three main problems in the actual production and operation: first, the deposition and scaling problem of gathering and transportation process is more prominent; second, some links can not clear the scale; third, the working procedure of partial process cleaning is complex. At present, the technologies used in scale control include electronic scale inhibitor, ultrasonic scale inhibitor and chemical agent scale control, etc. However, the effect of these anti-scaling techniques in practical application is not very obvious. In the transfer station, the U-shaped manifold in the metering room has not yet formed the technology suitable for cavitation jet operation. In view of the fact that the original technological process can not meet the actual demand of production well, starting from the key node of ternary gathering and transportation system which is easy to form scale and silt, a set of rapid scale removal and high operation efficiency technology suitable for ASP flooding has been formed. The main research contents are as follows: (1) the operation mode and reasonable scaling cycle of the mechanical automatic scale removal heating furnace are optimized. The scaling cycle is 3 times per day, which can ensure its operation under high efficiency. The wear caused by frequent scaling of steel brushes and disturbance of oil-water interface are avoided. The matching process of mechanical automatic scale removal furnace is improved. By adding 60 mesh filter net to the upper heat exchanger of split furnace, The removal rate of suspended solids reaches 51.6 and effectively prevents the scraped material from entering the downstream water mixing pipeline. (3) the on-line large discharge flushing parameters are defined, and the length of single well pipe is found out through field tests, and the length of single well pipe is 600 meters. With hot water at 71 鈩，

本文编号：1909190