Stratification phenomenon and laws of wax deposits of waxy oil triggered by asphaltene addition

LI Chuanxian; CAI Jinyang; CHENG Liang; YANG Fei; ZHANG Haoruo; ZHANG Ying

doi:10.11949/j.issn.0438-1157.20151723

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Stratification phenomenon and laws of wax deposits of waxy oil triggered by asphaltene addition

更新时间：2025-11-26

- Stratification phenomenon and laws of wax deposits of waxy oil triggered by asphaltene addition
- CIESC Journal Issue 6, Pages: 2426-2432(2016)
- 作者机构：
  
  1. 中国石油大学储运与建筑工程学院,山东,青岛,266555
  2. 中国石油天然气集团公司管道局,河北,廊坊,065000
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20151723
  CLC： E832
- Online First：05 June 2016，
  
  Published：05 June 2016
- 稿件说明：
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LI Chuanxian, CAI Jinyang, CHENG Liang, et al. Stratification phenomenon and laws of wax deposits of waxy oil triggered by asphaltene addition[J]. CIESC Journal, 2016, (6): 2426-2432.
DOI：

LI Chuanxian, CAI Jinyang, CHENG Liang, et al. Stratification phenomenon and laws of wax deposits of waxy oil triggered by asphaltene addition[J]. CIESC Journal, 2016, (6): 2426-2432. DOI： 10.11949/j.issn.0438-1157.20151723.

摘要

利用自主研发的Couette结蜡装置

对蜡含量相同的油样1(不含沥青质)和油样2[含0.75%(质量分数)沥青质]进行结蜡实验

并研究其结蜡层的分层现象和分层规律。通过对油样1和油样2结蜡表层和底层的宏观形貌、DSC放热、析蜡量、蜡晶微观形貌的分析发现:油样1结蜡层无明显分层现象

而油样2结蜡层分层现象明显

沥青质的加入导致了结蜡层的分层。与结蜡表层相比

油样2结蜡底层的析蜡点、蜡含量与沥青质含量显著升高

蜡晶形貌发展为致密的类球状大蜡晶。油样2结蜡表层沉积量随壁温的升高、油壁温差和转速的增大而减小;结蜡底层沉积量随壁温升高而减小

随油壁温差和转速的增大而增大;总的蜡沉积量随壁温的升高和转速的增大而减小

随油壁温差的增大先增大后减小。

Abstract

Stratification phenomenon and laws of wax deposits were studied for oil samples 1 (without asphaltene) and 2 (0.75%(mass) asphaltene) with the same wax content using the Couette wax deposition device. In the study of stratification phenomenon of wax deposits

the macroscopic morphology

DSC curves

amount of precipitated wax and wax crystal microcosmic morphology of the outer and inner deposits of oil samples 1 and 2 were analyzed. It was found that the deposit of oil sample 1 had no obvious stratification while that of oil sample 2 had obvious stratification

proving that the asphaltene led to the stratification of wax deposit. Compared with outer deposit

the WAT

amount of precipitated wax and asphaltene content of inner deposit of oil sample 2 increased significantly. It was found in the study of stratification laws of wax deposits that the outer wax deposition mass decreased with the increase of the temperature of wax deposition barrel

the temperature difference of oil and wax deposition barrel and the rotate speed of oil sample barrel

while the inner one deceased with the increase of the temperature of wax deposition barrel and increased with the temperature difference of oil and wax deposition barrel and the rotate speed of oil sample barrel. The total wax deposition mass deceased with the increase of the temperature of wax deposition barrel and the rotate speed of oil sample barrel

and increased firstly then decreased with the increase of the temperature difference of oil and wax deposition barrel.

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