CO2 huff-n-puff process to enhance heavy oil recovery and CO2 storage: An integration study

Xiang Zhou, Xiuluan Li, Dehuang Shen, Lanxiang Shi, Zhien Zhang, Xinge Sun and Qi Jiang

Energy, 2022, vol. 239, issue PB

Abstract: In this study, experimental and mathematical studies were carried out to investigate heavy oil production performance using the carbon dioxide (CO2) huff-n-puff process, as well as the potential of CO2 storage in abundant reservoirs. Five experiments were conducted under different injection pressures and different pressure depletion rates. The components in the produced heavy oil were measured using a gas chromatography-mass spectrometry system to investigate the influence of CO2 extraction under different injection pressures in different cycles. The experimental results indicate that (a) heavy oil recovery factor increases with increasing injection pressure. (b) CO2 extraction of the light/medium components in heavy oil affect heavy oil production. (c) With different pressure depletion rates, an optimized pressure depletion rate can be identified as 4 kPa/min. And (d) the relationship between heavy oil and gas production can be predicted using the developed equation with high agreements. Mathematically, the potential of CO2 storage and CO2 capacity were calculated, and the investigations show that the most significant influences on CO2 capacity are CO2 stored in the available space and dissolving into the remaining heavy oil. An objective function was developed to optimize the heavy oil recovery factor and the CO2 storage factor in the CO2 huff-n-puff process. The influences of weights between heavy oil production and CO2 storage were investigated, and the optimized case with the same weight (0.5) was studied.

Keywords: CO2 huff-n-puff; CO2 storage; Heavy oil; Injection pressure; Integration study (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544221022519
Full text for ScienceDirect subscribers only

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:eee:energy:v:239:y:2022:i:pb:s0360544221022519

DOI: 10.1016/j.energy.2021.122003

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().