牛心坨油田降粘降凝工艺转换方式的研究

发布时间：2018-06-04 14:06

本文选题：高凝稠油 + 牛心坨　；参考：《东北石油大学》2017年硕士论文

【摘要】：牛心坨油田隶属于高升采油厂,为高凝稠油油田,黏度高、含蜡高、凝固点高,采用闭式热水循环为主体工艺,为注水开发油田。但闭式热水循环工艺有着管柱密封性差等缺点,同时,高温热水的长期循环使用致使套管、管网锈蚀损害以及井下管网结垢情况非常严重,再加上这种工艺需要天然气供给量十分巨大而老区的天然气产量已无法满足现实需要,因此此工艺已经严重制约油田正常生产开发。而随着维护管理费用的不断增加,且管理难度越来越大,热水循环工艺呈现出难以维持的局面。所以,展开牛心坨油田举升工艺转换方式的研究在有效开发和稳产上都具有非常重要的意义。本文以举升工艺为基本出发点,并结合实验室与现场的实验情况,对井筒电加热降粘、化学药剂降粘、掺稀油降粘等举升工并在此基础上对空心杆电加热参数进行了改造。最后决定使用空心杆电加热工艺来取代之前的主体工艺,即在空心杆内下入专用电缆,利用集肤效应提高油管内原油的温度,而且可避免管壁结蜡、降粘等目的,同时由于电缆输出功率可根据不同的井况进行调整从而达到所需温度,因此大大提高了油井控制的自动化程度。
[Abstract]:Niuxintuo Oilfield belongs to Gaosheng Oil production Plant, which is a heavy oil field with high viscosity, high wax content and high freezing point. However, the closed hot water circulation process has some disadvantages, such as poor sealing property of pipe string. At the same time, the use of high temperature hot water for a long time causes casing, pipe network corrosion damage and downhole pipe network scaling. In addition, this process requires a very large amount of natural gas supply and the natural gas production in the old area can no longer meet the actual needs, so this process has seriously restricted the normal production and development of oil fields. With the increasing cost of maintenance and management, the hot water circulation process is difficult to maintain. Therefore, it is very important to study the transformation of lifting process in Niuxintuo Oilfield for effective development and stable production. In this paper, the lifting technology is taken as the basic starting point, and combined with the laboratory and field experiments, the electrical heating viscosity reduction, the chemical agent viscosity reduction and the dilute oil viscosity reduction of the wellbore are studied and the electrical heating parameters of the hollow rod are reformed. Finally, it was decided to use the hollow rod electric heating process instead of the previous main process, that is, to enter a special cable in the hollow rod, to use the skin effect to raise the temperature of crude oil in the tubing, and to avoid wax deposition and viscosity reduction on the pipe wall. At the same time, the output power of the cable can be adjusted according to different well conditions to achieve the required temperature, so the automation of well control is greatly 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】：TE355

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