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Advanced Transport in Porous Media for CO2 Storage and EOR

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "B3: Carbon Emission and Utilization".

Deadline for manuscript submissions: closed (31 January 2025) | Viewed by 894

Special Issue Editor


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Guest Editor
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Interests: reservoir geophysics; oil field development geology; theory and method of EOR; CCUS (carbon capture, utilization, and storage)

Special Issue Information

Dear Colleagues,

Carbon reduction has become the main issue facing the development of human society at present. Massive emissions of CO2, as a kind of greenhouse gas, will increase the greenhouse effect in the atmosphere, leading to the further deterioration of the environment that humans rely on for survival. Therefore, the effective storage of CO2 is an important measure to address global climate change. Carbon dioxide capture, utilization, and storage (CCUS) technology is an industrial process that separates CO2 from industry, energy utilization, or the atmosphere and directly utilizes or injects it into geological formations to reduce CO2 emissions. It is widely recognized as the most cost-effective measure to reduce greenhouse gas emissions in the international community today, and is expected to contribute to about one-third of carbon emission reduction by 2050. Previous research results have shown that oil and gas reservoirs are the best places for carbon utilization and storage. In the past 40 years, approximately 1 billion tons of CO2 have been injected into oil and gas reservoirs worldwide through CCUS technology, which not only enhances the oil recovery of depleted reservoirs, but also achieves the permanent geological storage of CO2, with extremely high social and economic benefits. Based on the above analysis, it can be seen that the CCUS technology in the oil and gas industry can effectively enhance the final oil recovery of oil and gas reservoirs and can increase oil and gas production to provide sustainable energy security for social development. Moreover, it can efficiently sequester CO2 from different sources and can reduce carbon emissions to provide a geological basis for the achievement of carbon peaking and carbon neutrality goals. Its research has a dual role in the industrial utilization and strategic storage of CO2, with broad market application prospects, and is also an important trend for the efficient and green development of unconventional oil and gas reservoirs.

This Special Issue aims to present and disseminate the most recent advances related to the theory, mechanism, modelling, method, technology, application, and influence factor of CO2 storage and EOR in porous media of oil and gas reservoir.

Dr. Fengqi Tan
Guest Editor

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Keywords

  • CO2 storage mechanism
  • quantitative calculation of CO2 storage capacity
  • numerical simulation of CO2 storage characteristics
  • microscopic pore structure of reservoir
  • seepage system of pores and throats
  • CO2 oil displacement mechanism
  • enhanced oil recovery
  • CO2 miscible displacement
  • Carbon capture, utilization, and storage (CCUS)
  • Type and capacity of CO2 storage
  • Chemical and physical storage mechanisms
  • Monitoring technology of CO2 storage safety
  • Numerical simulation of CO2 storage potential
  • CO2 oil displacement mechanism
  • CCUS-enhanced oil recovery
  • CO2 miscible conditions
  • Seepage system of micro pores and throats
  • Characteristics of unconventional oil and gas reservoirs
  • Interaction of rock–water–crude oil -CO2 in porous media
  • CO2 emission reduction and environmental effect

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Published Papers (1 paper)

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Research

15 pages, 8142 KiB  
Article
Study on the Propagation Law of CO2 Displacement in Tight Conglomerate Reservoirs in the Mahu Depression, Xinjiang, China
by Long Tan, Jigang Zhang, Jing Zhang, Ruihai Jiang, Jianhua Qin, Yan Dong, Zhenlong Deng, Ping Song, Chenguang Cui, Wenya Zhai and Fengqi Tan
Energies 2025, 18(4), 990; https://doi.org/10.3390/en18040990 - 18 Feb 2025
Viewed by 420
Abstract
To achieve the efficient utilization of low-permeability tight sand and gravel reservoirs with strong heterogeneity in the Mahu oil area of Xinjiang, CO2 injection is used to improve oil recovery. The sweep pattern of the injected gas is closely related to the [...] Read more.
To achieve the efficient utilization of low-permeability tight sand and gravel reservoirs with strong heterogeneity in the Mahu oil area of Xinjiang, CO2 injection is used to improve oil recovery. The sweep pattern of the injected gas is closely related to the development of reservoir pores and throats. Firstly, a three-dimensional model of the average pore-throat radius was established based on complete two-dimensional nuclear magnetic resonance scanning data of the target layer’s full-diameter core in the Wuerhe Formation. Subsequently, an online NMR injection CO2 continuous oil displacement experiment was conducted using tight conglomerate rock cores to clarify the rules of CO2 oil displacement in each pore-throat interval. Finally, the three-dimensional pore-throat model was combined with microscopic utilization patterns to quantitatively characterize the reservoir utilization rate of the CO2 displacement oil and guide on-site dynamic analysis. The research results indicate that the reservoir space of the Wuerhe Formation is mainly composed of residual intergranular pores, accounting for 40.9% of the pores, followed by intragranular dissolution pores and shrinkage pores. The proportion of pore-throat coordination numbers less than 1 is relatively high, reaching 86.3%. The average pore-throat radius calculation model, established using online NMR data from the continuous coring of full-diameter cores, elucidates the characteristics of the average pore-throat radius in the Wuerhe Formation reservoir. Based on gas displacement experiments that explored the pore-throat behavior at the microscale, the calibrated CO2 injection oil recovery rate was determined to be 43.9%, and the proportion of reserves utilized within the main range during CO2 displacement amounted to 60.77%. The injection pressure is negatively correlated with the maximum pore-throat radius of the gas injection well group, and negatively correlated with the proportion of the 0.9~2 μm distribution of large pore throats in each gas injection well group. Full article
(This article belongs to the Special Issue Advanced Transport in Porous Media for CO2 Storage and EOR)
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