垦利原油管道蜡沉积规律及防蜡剂研究

发布时间：2018-05-13 05:03

  本文选题：垦利原油 + 管道　； 参考：《西南石油大学》2015年硕士论文

【摘要】：垦利3-2油田群位于渤海海域南部,所处海域平均水深大约在20米。主要生产设施包括7个海上平台和一个陆上石油处理终端。其中包括BZ35-2CEPA和KL3-2CEPA(简称KL3-2)两座中心平台,本文主要针对KL3-2到陆上终端管线进行结蜡研究,预测蜡层厚度,为清管周期的确定提供依据,同时为管内输送原油筛选防蜡剂。主要内容如下： (1)对目前原油蜡沉积机理、影响因素、蜡沉积实验装置和蜡沉积数学模型等相关情况进行调研。 (2)选取KL3-2中心平台输出的混合原油为实验油样(命名为垦利原油),通过室内实验对所选油样进行物性研究,包括原油含蜡量测定、凝点测定、密度测定、粘度测定和比热容测定。 (3)根据文献调研,选用黄启玉蜡沉积模型。利用Fluent软件和普适性结蜡模型计算出在中国石油大学(北京)环道实验装置测试段内垦利原油的蜡沉积速率,并验证了该方法的可行性。 (4)根据不同流量和不同油壁温差条件下,中国石油大学(北京)环道实验装置测试段内得到的蜡沉积速率,研究了油温、油壁温差以及流速对蜡沉积速率的影响规律。回归出了垦利原油的蜡沉积模型。 (5)对KL3-2至陆上终端管线内蜡沉积厚度进行了研究。根据已知条件,运用Matlab编写了程序,预测该管线内不同输量、不同季节条件下不同位置处蜡沉积厚度随时间的变化情况,为清管周期的确定提供依据。 (6)通过市场调研,针对垦利原油的性质选出了4种防蜡剂,对这4种防蜡剂进行室内结蜡实验。结果表明：防蜡剂FJ-1101A效果最好,当加剂温度为80℃,防蜡剂添加量为500mg/L时,其最佳防蜡率能达到63%,垦利原油析蜡点降幅能达到15℃。
[Abstract]:Kenli 3-2 oilfield group is located in the south of Bohai Sea with an average water depth of about 20 meters. The main production facilities include 7 offshore platforms and 1 onshore oil processing terminal. There are two central platforms of BZ35-2CEPA and KL3-2CEPA (KL3-2 for short). In this paper, the wax deposit from KL3-2 to land-based pipeline is studied, and the thickness of wax layer is predicted, which provides the basis for determining the period of pipe-cleaning, and at the same time, it provides a basis for the selection of wax-proof agent for transporting crude oil inside the pipeline. The main contents are as follows: 1) the mechanism, influencing factors, experimental equipment and mathematical model of wax deposition in crude oil were investigated. The mixed crude oil from the KL3-2 central platform was selected as the experimental oil sample (named Kenli crude oil). The physical properties of the selected oil samples were studied through laboratory experiments, including the determination of the wax content of crude oil, the determination of freezing point, and the determination of density. Viscosity measurement and specific heat capacity measurement. According to the literature investigation, Huang Qi-yu wax deposition model was selected. The wax deposition rate of Kenli crude oil was calculated by using Fluent software and universal wax deposition model in the test section of the ring channel experimental facility of China University of Petroleum (Beijing), and the feasibility of the method was verified. According to different flow rate and different oil wall temperature difference, the effects of oil temperature, oil wall temperature difference and flow velocity on wax deposition rate are studied. The wax deposition model of Kenli crude oil was regressed. The wax deposit thickness in the pipeline from KL3-2 to land terminal is studied. According to the known conditions, a program has been compiled by Matlab to predict the variation of wax deposition thickness with time at different positions and in different seasons in the pipeline, which provides a basis for determining the pipe-clearing period. 6) through market research, four kinds of waxproof agents were selected according to the properties of Kenli crude oil, and the wax deposition experiments were carried out on these four kinds of waxproof agents. The results show that FJ-1101A has the best effect. When the temperature is 80 鈩，

本文编号：1881758