Experimental study on the mechanism of carbon dioxide removing formation paraffin deposits

被引：8

作者：

Sun, Xue ^{[1
]}

Ni, Hongjian ^{[1
]}

Qiao, Hongshi ^{[2
]}

Wang, Xueying ^{[3
]}

Ma, Bo ^{[3
]}

Wang, Ruihe ^{[3
]}

Shen, Zhonghou ^{[1
]}

Zhao, Mengyun ^{[4
]}

机构：

[1] China Univ Petr, Res Inst Unconvent Oil & Gas & New Energy, Qingdao 266580, Peoples R China

[2] CNPC Bohai Direct Drilling Serv Co, Tianjin 300280, Peoples R China

[3] China Univ Petr, Sch Petr Engn, Qingdao 266580, Peoples R China

[4] SINOPEC Explorat & Prod Res Inst, Res Inst Prod Engn, Beijing 100083, Peoples R China

来源：

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING | 2016年 / 32卷

关键词：

Carbon dioxide; Formation paraffin deposits removal; Adsorption-induced swelling; Experiment; CO2; COAL;

D O I：

10.1016/j.jngse.2016.03.073

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Formation paraffin deposits cause serious productivity damage during, the process of oil production. As an effective, economical and environmentally friendly organic solvent, CO2 has many advantages in removing formation paraffin deposits. In this paper, the mechanism of action for CO2-mediated removal of formation paraffin deposits is analysed. An indoor simulation of CO2-mediated removal of formation paraffin deposits is conducted. The feasibility of removing formation paraffin deposits by CO2 is investigated and the effect of injection parameters on plug removal efficiency is discussed. The experimental results show that CO2 adsorption-induced swelling and paraffin thermal expansion are the main factors that facilitate CO2-mediated removal of formation paraffin deposits. Plug removal using CO2 requires a long injection time. As the injection temperature increases, plug removal efficiency increases. As the injection pressure increases, plug removal efficiency first increases and then decreases, which allows for determination of the optimal injection pressure. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：59 / 65

页数：7

共 23 条

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