Mitigating Asphaltene Deposition in CO 2 Flooding with Carbon Quantum Dots

Qi Liu (), Yangwen Zhu, Hang Ye, Haiying Liao, Quanqi Dai, Michelle Tiong, Chenggang Xian and Dan Luo ()
Additional contact information
Qi Liu: State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development, Beijing 102206, China
Yangwen Zhu: State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development, Beijing 102206, China
Hang Ye: Unconventional Petroleum Research Institute, China University of Petroleum-Beijing, Beijing 102249, China
Haiying Liao: State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development, Beijing 102206, China
Quanqi Dai: State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Efficient Development, Beijing 102206, China
Michelle Tiong: Unconventional Petroleum Research Institute, China University of Petroleum-Beijing, Beijing 102249, China
Chenggang Xian: Unconventional Petroleum Research Institute, China University of Petroleum-Beijing, Beijing 102249, China
Dan Luo: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China

Energies, 2024, vol. 17, issue 11, 1-11

Abstract: Carbon capture, utilization, and storage (CCUS) technology has emerged as a pivotal measure in mitigating global climate change. Notably, CO 2 -EOR is esteemed for its dual function of sequestering CO 2 and enhancing oil recovery. However, this process presents challenges related to asphaltene deposition during CO 2 flooding, leading to reservoir damage, such as pore plugging. This study systematically manipulated the factors inducing CO 2 -induced asphaltene deposition, elucidating the mechanisms and magnitudes of asphaltene precipitation. Additionally, the study investigated the efficacy of carbon quantum dots (CQDs) in mitigating asphaltene deposition. Experimental findings indicated a positive correlation between asphaltene deposition and level of asphaltene content, CO 2 injection ratio, and temperature. Moreover, with an increase in experimental pressure, the asphaltene deposition rate demonstrated an initial increase followed by a subsequent decline. Leveraging their favorable compatibility with asphaltene, CQDs effectively suppressed the aggregation behavior of asphaltene. In the presence of CQDs, the onset of asphaltene precipitation was delayed from 45 V% to 55 V%, with the highest inhibition rate reaching approximately 36% at an optimal CQD concentration of 20 mg/L. This study proposes a novel approach to address asphaltene deposition issues in CO 2 -EOR processes, contributing to the enhancement of recovery rates in low-permeability reservoirs.

Keywords: CCUS; CO 2 -EOR; asphaltene deposition; carbon quantum dots; inhibition (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/17/11/2758/pdf (application/pdf)
https://www.mdpi.com/1996-1073/17/11/2758/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:17:y:2024:i:11:p:2758-:d:1408961

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().