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

被引：18

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

页码：1960 / 1966

页数：7

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