首页|Influence of glycol ether additive with low molecular weight on the interactions between CO2 and oil:Applications for enhanced shale oil recovery

Influence of glycol ether additive with low molecular weight on the interactions between CO2 and oil:Applications for enhanced shale oil recovery

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The high-efficient development of shale oil is one of the urgent problems in the petroleum industry.The technology of CO2 enhanced oil recovery(EOR)has shown significant effects in developing shale oil.The effects of several glycol ether additives with low molecular weight on the interactions between CO2 and oil were investigated here.The solubility of glycol ether additive in CO2 was firstly characterized.Then,the effects of glycol ether additives on the interfacial tension(IFT)between CO2 and hexadecane and the volume expansion and extraction performance between CO2 and hexadecane under different pressures was investigated.The experimental results show that diethylene glycol dimethyl ether(DEG),triethylene glycol dimethyl ether(TEG),and tetraethylene glycol dimethyl ether(TTEG)all have low cloud point pressure and high affinity with CO2.Under the same mass fraction,DGE has the best effect to reduce the IFT between hexadecane and CO2 by more than 30.0％,while an overall reduction of 20.0％-30.0％for TEG and 10.0％-20.0％for TTEG.A new method to measure the extraction and expansion rates has been established and can calculate the swelling factor accurately.After adding 1.0％DEG,the expansion and extraction amounts of CO2 for hexadecane are respectively increased to 1.75 times and 2.25 times.The results show that glycol ether additives assisted CO2 have potential application for EOR.This study can provide theoretical guidance for the optimization of CO2 composite systems for oil displacement.

Glycol ether additiveCloud point pressureInterfacial tensionExtractionExpansion

Huan Zhang、Hou-Jian Gong、Wei Lv、Ji-Wei Lv、Miao-Miao Gao、Shang-Lin Wu、Hai Sun、Long Xu、Ming-Zhe Dong

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Key Laboratory of Unconventional Oil & Gas Development(China University of Petroleum(East China)),Ministry of Education,Qingdao,266580,Shandong,China

Shool of Petroleum Engineering,China University of Petroleum(East China),Qingdao,266580,Shandong,China

Department of Chemical and Petroleum Engineering,University of Calgary,Calgary,Alberta,T2N 1N4,Canada

2024

10.1016/j.petsci.2024.06.004

石油科学(英文版)
中国石油大学（北京）

石油科学(英文版)

EI
影响因子：0.88
ISSN：1672-5107
年,卷(期)：2024.21(5)