Investigation of asphaltene deposition mechanisms during CO2 huff-n-puff injection in Eagle Ford shale

被引：17
|
作者：
Shen, Ziqi [1 ]
Sheng, James J. [1 ]
机构：
[1] Texas Tech Univ, Dept Petr Engn, POB 43111, Lubbock, TX 79409 USA
来源：
PETROLEUM SCIENCE AND TECHNOLOGY | 2017年 / 35卷 / 20期
关键词：
shale oil; asphaltene deposition; permeability reduction; CO2; injection; huff-n-puff injection; enhanced oil recovery; POROUS-MEDIA; ADSORPTION;
D O I：
10.1080/10916466.2017.1374403
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：
In this study, laboratory tests were conducted to investigate the asphaltene deposition mechanisms during CO2 huff-n-puff injection in an Eagle Ford shale core using Wolfcamp shale oil. The permeability reduction due to asphaltene deposition by mechanical plugging and adsorption mechanisms were determined using the n-Heptane and toluene reverse flooding, respectively. The results showed that 83% of the total permeability reduction is due to asphaltene deposition by mechanical plugging mechanism, while 17% of the total permeability reduction is due to asphaltene deposition by adsorption mechanism. The critical interstitial velocity for entrainment of asphaltene deposition was around 0.0008 cm/sec.
引用
收藏
页码：1960 / 1966
页数：7
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