大庆原油管输结蜡规律与清管周期的确定

doi:10.7623/syxb201205023

石油学报 ›› 2012, Vol. 33 ›› Issue (5): 892-987.DOI: 10.7623/syxb201205023

大庆原油管输结蜡规律与清管周期的确定

刘　扬 1　王志华 1　成庆林 1　李玉春 1,2

1　东北石油大学提高油气采收率教育部重点实验室　黑龙江大庆　163318；2　大庆油田工程建设有限公司　黑龙江大庆　163000

收稿日期:2012-03-27 修回日期:2012-07-04 出版日期:2012-09-25 发布日期:2012-11-27
通讯作者: 刘　扬
作者简介:刘　扬，男，1957年11月生，1988年获大连理工大学工学博士学位，现为东北石油大学教授、博士生导师，主要从事石油工程领域的优化、节能及安全评估等方面的研究。
基金资助:
国家自然科学基金项目(No.51174042，No.51051002，No.51106020)和高等学校博士学科点专项科研基金项目（20102322110002）资助。

The study of pipeline wax deposition law and pigging period for Daqing waxy crude oil

LIU Yang 1　WANG Zhihua 1　CHENG Qinglin 1　LI Yuchun 1,2

Received:2012-03-27 Revised:2012-07-04 Online:2012-09-25 Published:2012-11-27

摘要/Abstract

摘要：

在确定不同流态区管壁处剪切应力、蜡晶溶解度系数、径向温度梯度及管道沿线温降分布的基础上，回归建立了适用于描述大庆油田某两联合站间输油管道蜡沉积的结蜡模型。根据差压法原理，建立了研究原油管输结蜡过程室内模拟试验装置，并覆盖该输油管道的典型工况条件开展了管输原油结蜡模拟试验。相对偏差分析表明，结蜡模型预测结果与试验值的适配性良好。进而在预测运行时间对该输油管道结蜡影响的基础上，结合结蜡层厚度对管道轴向温降及压降的作用，确定了年季节最高与最低土壤温度期的清管作业周期分别为4个月和3个月。

关键词: 含蜡原油, 结蜡速率, 结蜡模型, 蜡沉积倾向系数, 清管周期

Abstract:

Based on the determination of pipe wall shearing stress,the wax molecular concentration gradient at pipe wall,the radial temperature gradient and the temperature drop distribution along pipeline for different flow pattern,the wax deposition model of the crude oil pipeline is established and applied to the oil pipeline between some two united stations in Daqing oilfield. According to the principle of differential pressure method,the indoor simulation experiment device is set up in order to study the wax deposition process of the crude oil pipeline. And the wax deposition experiment of oil transferring pipeline is developed which covers all the typical working conditions of the Daqing waxy crude oil pipeline. Then we analysis the suitability comparisons between the prediction results of the wax deposition model and the experimental data. The wax deposition influence of operation time on the pipeline is forecasted,and the pigging period of four months and three months for seasonal highest and lowest soil temperature is optimized respectively combined with the impact of the wax deposition thickness on pipeline axial temperature and pressure drop.

Key words: waxy crude oil, wax deposition rate, wax deposition model, wax deposition inclination coefficient, pigging period

刘　扬　王志华　成庆林　李玉春. 大庆原油管输结蜡规律与清管周期的确定[J]. 石油学报, 2012, 33(5): 892-987.

LIU Yang　WANG Zhihua　CHENG Qinglin　LI Yuchun. The study of pipeline wax deposition law and pigging period for Daqing waxy crude oil[J]. Editorial office of ACTA PETROLEI SINICA, 2012, 33(5): 892-987.

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大庆原油管输结蜡规律与清管周期的确定

The study of pipeline wax deposition law and pigging period for Daqing waxy crude oil

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